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<title>Configuration ยท NATS</title>
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<li class="chapter " data-level="1.1" data-path="../">
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<a href="../">
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Introduction
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<li class="chapter " data-level="1.2" data-path="../whats_new/whats_new_20.html">
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What's New in 2.0
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FAQ
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<a target="_blank" href="https://nats.io">
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nats.io
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<li class="header">Concepts</li>
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<li class="chapter " data-level="2.1" data-path="../developer/concepts/intro.html">
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<a href="../developer/concepts/intro.html">
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What is NATS
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</a>
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Subject-Based Messaging
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Publish-Subscribe
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</a>
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<li class="chapter " data-level="2.4" data-path="../developer/concepts/reqreply.html">
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<a href="../developer/concepts/reqreply.html">
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Request-Reply
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</a>
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</li>
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<li class="chapter " data-level="2.5" data-path="../developer/concepts/queue.html">
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<a href="../developer/concepts/queue.html">
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Queue Groups
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</a>
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</li>
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<li class="chapter " data-level="2.6" data-path="../developer/concepts/acks.html">
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<a href="../developer/concepts/acks.html">
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Acknowledgements
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</a>
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</li>
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<li class="chapter " data-level="2.7" data-path="../developer/concepts/seq_num.html">
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<a href="../developer/concepts/seq_num.html">
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Sequence Numbers
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</a>
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</li>
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<li class="header">Developing With NATS</li>
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<li class="chapter " data-level="3.1" data-path="../developer/">
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<a href="../developer/">
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Introduction
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</a>
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</li>
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<li class="chapter " data-level="3.2" data-path="../developer/connecting/intro.html">
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<a href="../developer/connecting/intro.html">
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Connecting
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.2.1" data-path="../developer/connecting/default_server.html">
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<a href="../developer/connecting/default_server.html">
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Connecting to the Default Server
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</a>
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</li>
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<li class="chapter " data-level="3.2.2" data-path="../developer/connecting/specific_server.html">
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<a href="../developer/connecting/specific_server.html">
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Connecting to a Specific Server
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</a>
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</li>
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<li class="chapter " data-level="3.2.3" data-path="../developer/connecting/cluster.html">
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<a href="../developer/connecting/cluster.html">
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Connecting to a Cluster
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</a>
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</li>
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<li class="chapter " data-level="3.2.4" data-path="../developer/connecting/connect_timeout.html">
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<a href="../developer/connecting/connect_timeout.html">
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Setting a Connect Timeout
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</a>
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</li>
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<li class="chapter " data-level="3.2.5" data-path="../developer/connecting/pingpong.html">
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<a href="../developer/connecting/pingpong.html">
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Ping/Pong Protocol
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</a>
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</li>
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<li class="chapter " data-level="3.2.6" data-path="../developer/connecting/protocol.html">
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<a href="../developer/connecting/protocol.html">
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Controlling the Client/Server Protocol
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</a>
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</li>
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<li class="chapter " data-level="3.2.7" data-path="../developer/connecting/noecho.html">
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<a href="../developer/connecting/noecho.html">
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Turning Off Echo'd Messages
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.3" data-path="../developer/reconnect/intro.html">
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<a href="../developer/reconnect/intro.html">
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Automatic Reconnections
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.3.1" data-path="../developer/reconnect/disable.html">
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<a href="../developer/reconnect/disable.html">
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Disabling Reconnect
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</a>
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</li>
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<li class="chapter " data-level="3.3.2" data-path="../developer/reconnect/max.html">
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<a href="../developer/reconnect/max.html">
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Set the Number of Reconnect Attempts
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</a>
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</li>
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<li class="chapter " data-level="3.3.3" data-path="../developer/reconnect/wait.html">
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<a href="../developer/reconnect/wait.html">
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Pausing Between Reconnect Attempts
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</a>
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</li>
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<li class="chapter " data-level="3.3.4" data-path="../developer/reconnect/random.html">
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<a href="../developer/reconnect/random.html">
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Avoiding the Thundering Herd
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</a>
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</li>
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<li class="chapter " data-level="3.3.5" data-path="../developer/reconnect/events.html">
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<a href="../developer/reconnect/events.html">
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Listening for Reconnect Events
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</a>
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</li>
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<li class="chapter " data-level="3.3.6" data-path="../developer/reconnect/buffer.html">
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<a href="../developer/reconnect/buffer.html">
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Buffering Messages During Reconnect Attempts
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.4" data-path="../developer/security/intro.html">
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<a href="../developer/security/intro.html">
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Securing Connections
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.4.1" data-path="../developer/security/userpass.html">
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<a href="../developer/security/userpass.html">
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Authenticating with a User and Password
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</a>
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</li>
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<li class="chapter " data-level="3.4.2" data-path="../developer/security/token.html">
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<a href="../developer/security/token.html">
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Authenticating with a Token
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</a>
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</li>
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<li class="chapter " data-level="3.4.3" data-path="../developer/security/nkey.html">
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<a href="../developer/security/nkey.html">
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Authenticating with an NKey
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</a>
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</li>
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<li class="chapter " data-level="3.4.4" data-path="../developer/security/creds.html">
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<a href="../developer/security/creds.html">
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Authenticating with a Credentials File
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</a>
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</li>
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<li class="chapter " data-level="3.4.5" data-path="../developer/security/tls.html">
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<a href="../developer/security/tls.html">
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Encrypting Connections with TLS
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.5" data-path="../developer/receiving/intro.html">
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<a href="../developer/receiving/intro.html">
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Receiving Messages
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.5.1" data-path="../developer/receiving/sync.html">
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<a href="../developer/receiving/sync.html">
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Synchronous Subscriptions
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</a>
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</li>
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<li class="chapter " data-level="3.5.2" data-path="../developer/receiving/async.html">
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<a href="../developer/receiving/async.html">
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Asynchronous Subscriptions
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</a>
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</li>
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<li class="chapter " data-level="3.5.3" data-path="../developer/receiving/unsubscribing.html">
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<a href="../developer/receiving/unsubscribing.html">
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Unsubscribing
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</a>
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</li>
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<li class="chapter " data-level="3.5.4" data-path="../developer/receiving/unsub_after.html">
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<a href="../developer/receiving/unsub_after.html">
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Unsubscribing After N Messages
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</a>
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</li>
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<li class="chapter " data-level="3.5.5" data-path="../developer/receiving/reply.html">
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<a href="../developer/receiving/reply.html">
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Replying to a Message
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</a>
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</li>
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<li class="chapter " data-level="3.5.6" data-path="../developer/receiving/wildcards.html">
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<a href="../developer/receiving/wildcards.html">
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Wildcard Subscriptions
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</a>
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</li>
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<li class="chapter " data-level="3.5.7" data-path="../developer/receiving/queues.html">
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<a href="../developer/receiving/queues.html">
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Queue Subscriptions
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</a>
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</li>
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<li class="chapter " data-level="3.5.8" data-path="../developer/receiving/drain.html">
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<a href="../developer/receiving/drain.html">
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Draining Messages Before Disconnect
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</a>
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</li>
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<li class="chapter " data-level="3.5.9" data-path="../developer/receiving/structure.html">
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<a href="../developer/receiving/structure.html">
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Structured Data
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.6" data-path="../developer/sending/intro.html">
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<a href="../developer/sending/intro.html">
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Sending Messages
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.6.1" data-path="../developer/sending/replyto.html">
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<a href="../developer/sending/replyto.html">
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Including a Reply Subject
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</a>
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</li>
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<li class="chapter " data-level="3.6.2" data-path="../developer/sending/request_reply.html">
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<a href="../developer/sending/request_reply.html">
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Request-Reply Semantics
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</a>
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</li>
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<li class="chapter " data-level="3.6.3" data-path="../developer/sending/caches.html">
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<a href="../developer/sending/caches.html">
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Caches, Flush and Ping
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</a>
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</li>
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<li class="chapter " data-level="3.6.4" data-path="../developer/sending/structure.html">
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<a href="../developer/sending/structure.html">
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Sending Structured Data
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.7" data-path="../developer/events/intro.html">
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<a href="../developer/events/intro.html">
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Monitoring the Connection
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.7.1" data-path="../developer/events/events.html">
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<a href="../developer/events/events.html">
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Listen for Connection Events
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</a>
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</li>
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<li class="chapter " data-level="3.7.2" data-path="../developer/events/slow.html">
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<a href="../developer/events/slow.html">
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Slow Consumers
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="3.8" data-path="../developer/tutorials/intro.html">
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<a href="../developer/tutorials/intro.html">
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Tutorials
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</a>
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<ul class="articles">
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<li class="chapter " data-level="3.8.1" data-path="../developer/tutorials/pubsub.html">
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<a href="../developer/tutorials/pubsub.html">
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Explore NATS Pub/Sub
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</a>
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</li>
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<li class="chapter " data-level="3.8.2" data-path="../developer/tutorials/reqreply.html">
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<a href="../developer/tutorials/reqreply.html">
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Explore NATS Request/Reply
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</a>
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</li>
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|
<li class="chapter " data-level="3.8.3" data-path="../developer/tutorials/queues.html">
|
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<a href="../developer/tutorials/queues.html">
|
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|
|
Explore NATS Queueing
|
|
|
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</a>
|
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</li>
|
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|
<li class="chapter " data-level="3.8.4" data-path="../developer/tutorials/custom_dialer.html">
|
|
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|
<a href="../developer/tutorials/custom_dialer.html">
|
|
|
|
|
|
Advanced Connect and Custom Dialer in Go
|
|
|
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</a>
|
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</li>
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</ul>
|
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</li>
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|
|
<li class="header">NATS Server</li>
|
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|
|
|
|
|
<li class="chapter " data-level="4.1" data-path="../nats_server/installation.html">
|
|
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|
<a href="../nats_server/installation.html">
|
|
|
|
|
|
Installing
|
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</a>
|
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|
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</li>
|
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|
<li class="chapter " data-level="4.2" data-path="../nats_server/running.html">
|
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|
<a href="../nats_server/running.html">
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|
Running
|
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</a>
|
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<ul class="articles">
|
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|
|
<li class="chapter " data-level="4.2.1" data-path="../nats_server/windows_srv.html">
|
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|
<a href="../nats_server/windows_srv.html">
|
|
|
|
|
|
Window Service
|
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|
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</a>
|
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</li>
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</ul>
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</li>
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|
<li class="chapter " data-level="4.3" data-path="../nats_server/clients.html">
|
|
|
|
<a href="../nats_server/clients.html">
|
|
|
|
|
|
Clients
|
|
|
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</a>
|
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</li>
|
|
|
|
<li class="chapter " data-level="4.4" data-path="../nats_server/flags.html">
|
|
|
|
<a href="../nats_server/flags.html">
|
|
|
|
|
|
Flags
|
|
|
|
</a>
|
|
|
|
|
|
|
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</li>
|
|
|
|
<li class="chapter " data-level="4.5" data-path="../nats_server/configuration.html">
|
|
|
|
<a href="../nats_server/configuration.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
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|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.5.1" data-path="../nats_server/securing_nats.html">
|
|
|
|
<a href="../nats_server/securing_nats.html">
|
|
|
|
|
|
Securing NATS
|
|
|
|
</a>
|
|
|
|
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|
<ul class="articles">
|
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|
|
<li class="chapter " data-level="4.5.1.1" data-path="../nats_server/tls.html">
|
|
|
|
<a href="../nats_server/tls.html">
|
|
|
|
|
|
Enabling TLS
|
|
|
|
</a>
|
|
|
|
|
|
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</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2" data-path="../nats_server/auth_intro.html">
|
|
|
|
<a href="../nats_server/auth_intro.html">
|
|
|
|
|
|
Authentication
|
|
|
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</a>
|
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|
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<ul class="articles">
|
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|
|
<li class="chapter " data-level="4.5.1.2.1" data-path="../nats_server/tokens.html">
|
|
|
|
<a href="../nats_server/tokens.html">
|
|
|
|
|
|
Tokens
|
|
|
|
</a>
|
|
|
|
|
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</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.2" data-path="../nats_server/username_password.html">
|
|
|
|
<a href="../nats_server/username_password.html">
|
|
|
|
|
|
Username/Password
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.3" data-path="../nats_server/tls_mutual_auth.html">
|
|
|
|
<a href="../nats_server/tls_mutual_auth.html">
|
|
|
|
|
|
TLS Authentication
|
|
|
|
</a>
|
|
|
|
|
|
|
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</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.4" data-path="../nats_server/nkey_auth.html">
|
|
|
|
<a href="../nats_server/nkey_auth.html">
|
|
|
|
|
|
NKeys
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.5" data-path="../nats_server/accounts.html">
|
|
|
|
<a href="../nats_server/accounts.html">
|
|
|
|
|
|
Accounts
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.6" data-path="../nats_server/jwt_auth.html">
|
|
|
|
<a href="../nats_server/jwt_auth.html">
|
|
|
|
|
|
JWTs
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.2.7" data-path="../nats_server/auth_timeout.html">
|
|
|
|
<a href="../nats_server/auth_timeout.html">
|
|
|
|
|
|
Authentication Timeout
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.1.3" data-path="../nats_server/authorization.html">
|
|
|
|
<a href="../nats_server/authorization.html">
|
|
|
|
|
|
Authorization
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.2" data-path="../nats_server/clustering.html">
|
|
|
|
<a href="../nats_server/clustering.html">
|
|
|
|
|
|
Clustering
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.5.2.1" data-path="../nats_server/cluster_config.html">
|
|
|
|
<a href="../nats_server/cluster_config.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.2.2" data-path="../nats_server/cluster_tls.html">
|
|
|
|
<a href="../nats_server/cluster_tls.html">
|
|
|
|
|
|
TLS Authentication
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.3" data-path="../gateways/">
|
|
|
|
<a href="../gateways/">
|
|
|
|
|
|
Gateways
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.5.3.1" data-path="../gateways/gateway.html">
|
|
|
|
<a href="../gateways/gateway.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.4" data-path="../leafnodes/">
|
|
|
|
<a href="../leafnodes/">
|
|
|
|
|
|
Leaf Nodes
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.5.4.1" data-path="../leafnodes/leafnode_conf.html">
|
|
|
|
<a href="../leafnodes/leafnode_conf.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.5" data-path="../nats_server/logging.html">
|
|
|
|
<a href="../nats_server/logging.html">
|
|
|
|
|
|
Logging
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.5.6" data-path="../nats_server/monitoring.html">
|
|
|
|
<a href="../nats_server/monitoring.html">
|
|
|
|
|
|
Monitoring
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.6" data-path="../nats_admin/">
|
|
|
|
<a href="../nats_admin/">
|
|
|
|
|
|
Managing A NATS Server
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.6.1" data-path="../nats_admin/upgrading_cluster.html">
|
|
|
|
<a href="../nats_admin/upgrading_cluster.html">
|
|
|
|
|
|
Upgrading a Cluster
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.6.2" data-path="../nats_admin/slow_consumers.html">
|
|
|
|
<a href="../nats_admin/slow_consumers.html">
|
|
|
|
|
|
Slow Consumers
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.6.3" data-path="../nats_admin/signals.html">
|
|
|
|
<a href="../nats_admin/signals.html">
|
|
|
|
|
|
Signals
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.6.4" data-path="./">
|
|
|
|
<a href="./">
|
|
|
|
|
|
System Accounts
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter active" data-level="4.6.4.1" data-path="sys_accounts.html">
|
|
|
|
<a href="sys_accounts.html">
|
|
|
|
|
|
Configuration
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
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|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.7" data-path="../nats_docker/">
|
|
|
|
<a href="../nats_docker/">
|
|
|
|
|
|
NATS and Docker
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="4.7.1" data-path="../nats_docker/nats-docker-tutorial.html">
|
|
|
|
<a href="../nats_docker/nats-docker-tutorial.html">
|
|
|
|
|
|
Tutorial
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="4.7.2" data-path="../nats_docker/docker_swarm.html">
|
|
|
|
<a href="../nats_docker/docker_swarm.html">
|
|
|
|
|
|
Docker Swarm
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
|
|
</ul>
|
|
|
|
</li>
|
|
|
|
|
|
|
|
|
|
<li class="header">NATS Tools</li>
|
|
|
|
|
|
|
|
<li class="chapter " data-level="5.1" data-path="../nats_tools/mkpasswd.html">
|
|
|
|
<a href="../nats_tools/mkpasswd.html">
|
|
|
|
|
|
mkpasswd
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.2" data-path="../nats_tools/nk.html">
|
|
|
|
<a href="../nats_tools/nk.html">
|
|
|
|
|
|
nk
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3" data-path="../nats_tools/nsc/">
|
|
|
|
<a href="../nats_tools/nsc/">
|
|
|
|
|
|
nsc
|
|
|
|
</a>
|
|
|
|
|
|
|
|
<ul class="articles">
|
|
|
|
|
|
<li class="chapter " data-level="5.3.1" data-path="../nats_tools/nsc/nsc.html">
|
|
|
|
<a href="../nats_tools/nsc/nsc.html">
|
|
|
|
|
|
Basics
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3.2" data-path="../nats_tools/nsc/streams.html">
|
|
|
|
<a href="../nats_tools/nsc/streams.html">
|
|
|
|
|
|
Streams
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3.3" data-path="../nats_tools/nsc/services.html">
|
|
|
|
<a href="../nats_tools/nsc/services.html">
|
|
|
|
|
|
Services
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3.4" data-path="../nats_tools/nsc/signing_keys.html">
|
|
|
|
<a href="../nats_tools/nsc/signing_keys.html">
|
|
|
|
|
|
Signing Keys
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3.5" data-path="../nats_tools/nsc/revocation.html">
|
|
|
|
<a href="../nats_tools/nsc/revocation.html">
|
|
|
|
|
|
Revocation
|
|
|
|
</a>
|
|
|
|
|
|
|
|
</li>
|
|
|
|
<li class="chapter " data-level="5.3.6" data-path="../nats_tools/nsc/managed.html">
|
|
|
|
<a href="../nats_tools/nsc/managed.html">
|
|
|
|
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Managed Operators
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="5.4" data-path="../nats_tools/nas/">
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<a href="../nats_tools/nas/">
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nats-account-server
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</a>
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<ul class="articles">
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<li class="chapter " data-level="5.4.1" data-path="../nats_tools/nas/nas_conf.html">
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<a href="../nats_tools/nas/nas_conf.html">
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Basics
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</a>
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</li>
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<li class="chapter " data-level="5.4.2" data-path="../nats_tools/nas/inspecting_jwts.html">
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<a href="../nats_tools/nas/inspecting_jwts.html">
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Inspecting JWTs
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</a>
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</li>
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<li class="chapter " data-level="5.4.3" data-path="../nats_tools/nas/dir_store.html">
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<a href="../nats_tools/nas/dir_store.html">
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Directory Store
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</a>
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</li>
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<li class="chapter " data-level="5.4.4" data-path="../nats_tools/nas/notifications.html">
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<a href="../nats_tools/nas/notifications.html">
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Update Notifications
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</a>
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</li>
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<li class="chapter " data-level="5.4.5" data-path="../nats_tools/nas/mem_resolver.html">
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<a href="../nats_tools/nas/mem_resolver.html">
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Memory Resolver
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="5.5" data-path="../nats_tools/nats_top/">
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<a href="../nats_tools/nats_top/">
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nats-top
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</a>
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<ul class="articles">
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<li class="chapter " data-level="5.5.1" data-path="../nats_tools/nats_top/nats-top-tutorial.html">
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<a href="../nats_tools/nats_top/nats-top-tutorial.html">
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Tutorial
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="5.6" data-path="../nats_tools/natsbench.html">
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<a href="../nats_tools/natsbench.html">
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nats-bench
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</a>
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</li>
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<li class="header">NATS Streaming Concepts</li>
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<li class="chapter " data-level="6.1" data-path="../nats_streaming/intro.html">
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<a href="../nats_streaming/intro.html">
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Introduction
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</a>
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</li>
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<li class="chapter " data-level="6.2" data-path="../nats_streaming/relation-to-nats.html">
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<a href="../nats_streaming/relation-to-nats.html">
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Relation to NATS
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</a>
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</li>
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<li class="chapter " data-level="6.3" data-path="../nats_streaming/client-connections.html">
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<a href="../nats_streaming/client-connections.html">
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Client Connections
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</a>
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</li>
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<li class="chapter " data-level="6.4" data-path="../nats_streaming/channels/channels.html">
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<a href="../nats_streaming/channels/channels.html">
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Channels
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</a>
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<ul class="articles">
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<li class="chapter " data-level="6.4.1" data-path="../nats_streaming/channels/message-log.html">
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<a href="../nats_streaming/channels/message-log.html">
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Message Log
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</a>
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</li>
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<li class="chapter " data-level="6.4.2" data-path="../nats_streaming/channels/subscriptions/subscriptions.html">
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<a href="../nats_streaming/channels/subscriptions/subscriptions.html">
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Subscriptions
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</a>
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<ul class="articles">
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<li class="chapter " data-level="6.4.2.1" data-path="../nats_streaming/channels/subscriptions/regular.html">
|
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<a href="../nats_streaming/channels/subscriptions/regular.html">
|
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Regular
|
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</a>
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</li>
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<li class="chapter " data-level="6.4.2.2" data-path="../nats_streaming/channels/subscriptions/durable.html">
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<a href="../nats_streaming/channels/subscriptions/durable.html">
|
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Durable
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</a>
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</li>
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<li class="chapter " data-level="6.4.2.3" data-path="../nats_streaming/channels/subscriptions/queue-group.html">
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<a href="../nats_streaming/channels/subscriptions/queue-group.html">
|
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Queue Group
|
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</a>
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</li>
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<li class="chapter " data-level="6.4.2.4" data-path="../nats_streaming/channels/subscriptions/redelivery.html">
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<a href="../nats_streaming/channels/subscriptions/redelivery.html">
|
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Redelivery
|
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</a>
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</li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="6.5" data-path="../nats_streaming/store-interface.html">
|
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|
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<a href="../nats_streaming/store-interface.html">
|
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|
|
|
Store Interface
|
|
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</a>
|
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</li>
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|
<li class="chapter " data-level="6.6" data-path="../nats_streaming/store-encryption.html">
|
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|
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<a href="../nats_streaming/store-encryption.html">
|
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|
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Store Encryption
|
|
|
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</a>
|
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</li>
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|
<li class="chapter " data-level="6.7" data-path="../nats_streaming/clustering/clustering.html">
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|
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<a href="../nats_streaming/clustering/clustering.html">
|
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|
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Clustering
|
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</a>
|
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<ul class="articles">
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<li class="chapter " data-level="6.7.1" data-path="../nats_streaming/clustering/supported-stores.html">
|
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|
|
<a href="../nats_streaming/clustering/supported-stores.html">
|
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|
|
|
Supported Stores
|
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</a>
|
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</li>
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<li class="chapter " data-level="6.7.2" data-path="../nats_streaming/clustering/configuration.html">
|
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|
<a href="../nats_streaming/clustering/configuration.html">
|
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|
|
Configuration
|
|
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</a>
|
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</li>
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<li class="chapter " data-level="6.7.3" data-path="../nats_streaming/clustering/auto-configuration.html">
|
|
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|
<a href="../nats_streaming/clustering/auto-configuration.html">
|
|
|
|
|
|
Auto Configuration
|
|
|
|
</a>
|
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</li>
|
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|
<li class="chapter " data-level="6.7.4" data-path="../nats_streaming/clustering/containers.html">
|
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|
|
<a href="../nats_streaming/clustering/containers.html">
|
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|
|
Containers
|
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</a>
|
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</li>
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</ul>
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</li>
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|
<li class="chapter " data-level="6.8" data-path="../nats_streaming/fault-tolerance/ft.html">
|
|
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|
<a href="../nats_streaming/fault-tolerance/ft.html">
|
|
|
|
|
|
Fault Tolerance
|
|
|
|
</a>
|
|
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<ul class="articles">
|
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<li class="chapter " data-level="6.8.1" data-path="../nats_streaming/fault-tolerance/active-server.html">
|
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|
|
<a href="../nats_streaming/fault-tolerance/active-server.html">
|
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|
|
Active Server
|
|
|
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</a>
|
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</li>
|
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<li class="chapter " data-level="6.8.2" data-path="../nats_streaming/fault-tolerance/standby-server.html">
|
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|
|
<a href="../nats_streaming/fault-tolerance/standby-server.html">
|
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|
|
Standby Servers
|
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|
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</a>
|
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</li>
|
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<li class="chapter " data-level="6.8.3" data-path="../nats_streaming/fault-tolerance/shared-state.html">
|
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|
|
<a href="../nats_streaming/fault-tolerance/shared-state.html">
|
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|
|
Shared State
|
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</a>
|
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</li>
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<li class="chapter " data-level="6.8.4" data-path="../nats_streaming/fault-tolerance/failover.html">
|
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|
|
<a href="../nats_streaming/fault-tolerance/failover.html">
|
|
|
|
|
|
Failover
|
|
|
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</a>
|
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</li>
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</ul>
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</li>
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|
<li class="chapter " data-level="6.9" data-path="../nats_streaming/partitioning.html">
|
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|
|
<a href="../nats_streaming/partitioning.html">
|
|
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|
|
|
Partitioning
|
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</a>
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</li>
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|
<li class="chapter " data-level="6.10" data-path="../nats_streaming/monitoring/monitoring.html">
|
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|
|
<a href="../nats_streaming/monitoring/monitoring.html">
|
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|
|
|
|
Monitoring
|
|
|
|
</a>
|
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<ul class="articles">
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<li class="chapter " data-level="6.10.1" data-path="../nats_streaming/monitoring/endpoints.html">
|
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|
<a href="../nats_streaming/monitoring/endpoints.html">
|
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|
|
|
Endpoints
|
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</a>
|
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</li>
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</ul>
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</li>
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<li class="header">Developing With NATS Streaming</li>
|
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|
<li class="chapter " data-level="7.1" data-path="../developer/streaming/">
|
|
|
|
<a href="../developer/streaming/">
|
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|
|
|
|
Introduction
|
|
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</a>
|
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|
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</li>
|
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|
<li class="chapter " data-level="7.2" data-path="../developer/streaming/connecting.html">
|
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|
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<a href="../developer/streaming/connecting.html">
|
|
|
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|
|
Connecting to NATS Streaming
|
|
|
|
</a>
|
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</li>
|
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|
|
<li class="chapter " data-level="7.3" data-path="../developer/streaming/publishing.html">
|
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|
<a href="../developer/streaming/publishing.html">
|
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|
|
|
|
Publishing to a Channel
|
|
|
|
</a>
|
|
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</li>
|
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|
<li class="chapter " data-level="7.4" data-path="../developer/streaming/receiving.html">
|
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|
<a href="../developer/streaming/receiving.html">
|
|
|
|
|
|
Receiving Messages from a Channel
|
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|
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</a>
|
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</li>
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|
|
<li class="chapter " data-level="7.5" data-path="../developer/streaming/durables.html">
|
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<a href="../developer/streaming/durables.html">
|
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|
|
|
Durable Subscriptions
|
|
|
|
</a>
|
|
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</li>
|
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|
<li class="chapter " data-level="7.6" data-path="../developer/streaming/queues.html">
|
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|
|
<a href="../developer/streaming/queues.html">
|
|
|
|
|
|
Queue Subscriptions
|
|
|
|
</a>
|
|
|
|
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</li>
|
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|
|
<li class="chapter " data-level="7.7" data-path="../developer/streaming/acks.html">
|
|
|
|
<a href="../developer/streaming/acks.html">
|
|
|
|
|
|
Acknowledgements
|
|
|
|
</a>
|
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|
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</li>
|
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|
<li class="chapter " data-level="7.8" data-path="../developer/streaming/protocol.html">
|
|
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|
<a href="../developer/streaming/protocol.html">
|
|
|
|
|
|
The Streaming Protocol
|
|
|
|
</a>
|
|
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|
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</li>
|
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|
|
<li class="header">NATS Streaming Server</li>
|
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|
|
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|
|
<li class="chapter " data-level="8.1" data-path="../nats_streaming/gettingstarted/changes.html">
|
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|
|
<a href="../nats_streaming/gettingstarted/changes.html">
|
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|
|
|
|
Important Changes
|
|
|
|
</a>
|
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|
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</li>
|
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|
|
<li class="chapter " data-level="8.2" data-path="../nats_streaming/gettingstarted/install.html">
|
|
|
|
<a href="../nats_streaming/gettingstarted/install.html">
|
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|
|
|
|
Installing
|
|
|
|
</a>
|
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|
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</li>
|
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|
|
<li class="chapter " data-level="8.3" data-path="../nats_streaming/gettingstarted/run.html">
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|
<a href="../nats_streaming/gettingstarted/run.html">
|
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|
|
|
Running
|
|
|
|
</a>
|
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</li>
|
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|
<li class="chapter " data-level="8.4" data-path="../nats_streaming/configuring/configuring.html">
|
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|
|
<a href="../nats_streaming/configuring/configuring.html">
|
|
|
|
|
|
Configuring
|
|
|
|
</a>
|
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|
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<ul class="articles">
|
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|
<li class="chapter " data-level="8.4.1" data-path="../nats_streaming/configuring/cmdline.html">
|
|
|
|
<a href="../nats_streaming/configuring/cmdline.html">
|
|
|
|
|
|
Command line arguments
|
|
|
|
</a>
|
|
|
|
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</li>
|
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|
|
<li class="chapter " data-level="8.4.2" data-path="../nats_streaming/configuring/cfgfile.html">
|
|
|
|
<a href="../nats_streaming/configuring/cfgfile.html">
|
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|
|
|
|
Configuration file
|
|
|
|
</a>
|
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</li>
|
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<li class="chapter " data-level="8.4.3" data-path="../nats_streaming/configuring/storelimits.html">
|
|
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|
<a href="../nats_streaming/configuring/storelimits.html">
|
|
|
|
|
|
Store Limits
|
|
|
|
</a>
|
|
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|
<ul class="articles">
|
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|
<li class="chapter " data-level="8.4.3.1" data-path="../nats_streaming/configuring/storelimits.html">
|
|
|
|
<a href="../nats_streaming/configuring/storelimits.html#limits-inheritance">
|
|
|
|
|
|
Limits inheritance
|
|
|
|
</a>
|
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</li>
|
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</ul>
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</li>
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<li class="chapter " data-level="8.4.4" data-path="../nats_streaming/configuring/persistence.html">
|
|
|
|
<a href="../nats_streaming/configuring/persistence.html">
|
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Persistence
|
|
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|
</a>
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<ul class="articles">
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<li class="chapter " data-level="8.4.4.1" data-path="../nats_streaming/configuring/filestore.html">
|
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<a href="../nats_streaming/configuring/filestore.html">
|
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|
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File Store
|
|
|
|
</a>
|
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<ul class="articles">
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<li class="chapter " data-level="8.4.4.1.1" data-path="../nats_streaming/configuring/filestore.html">
|
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<a href="../nats_streaming/configuring/filestore.html#options">
|
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Options
|
|
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</a>
|
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</li>
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<li class="chapter " data-level="8.4.4.1.2" data-path="../nats_streaming/configuring/filestore.html">
|
|
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<a href="../nats_streaming/configuring/filestore.html#recovery-errors">
|
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|
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Recovery Errors
|
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="8.4.4.2" data-path="../nats_streaming/configuring/sqlstore.html">
|
|
|
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<a href="../nats_streaming/configuring/sqlstore.html">
|
|
|
|
|
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SQL Store
|
|
|
|
</a>
|
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|
|
|
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|
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<ul class="articles">
|
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<li class="chapter " data-level="8.4.4.2.1" data-path="../nats_streaming/configuring/sqlstore.html">
|
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<a href="../nats_streaming/configuring/sqlstore.html#read-and-write-timeouts">
|
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|
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Read and Write Timeouts
|
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|
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</a>
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</li>
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<li class="chapter " data-level="8.4.4.2.2" data-path="../nats_streaming/configuring/sqlstore.html">
|
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<a href="../nats_streaming/configuring/sqlstore.html#options">
|
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Options
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</a>
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</li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="8.4.5" data-path="../nats_streaming/configuring/tls.html">
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<a href="../nats_streaming/configuring/tls.html">
|
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Securing
|
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</a>
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<ul class="articles">
|
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<li class="chapter " data-level="8.4.5.1" data-path="../nats_streaming/configuring/tls.html">
|
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|
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<a href="../nats_streaming/configuring/tls.html#authenticating-users">
|
|
|
|
|
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Authenticating Users
|
|
|
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</a>
|
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</li>
|
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<li class="chapter " data-level="8.4.5.2" data-path="../nats_streaming/configuring/tls.html">
|
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<a href="../nats_streaming/configuring/tls.html#using-tls">
|
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|
|
|
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TLS
|
|
|
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</a>
|
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</li>
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</ul>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="8.5" data-path="../nats_streaming/gettingstarted/process-signaling.html">
|
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|
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<a href="../nats_streaming/gettingstarted/process-signaling.html">
|
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|
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Process Signaling
|
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|
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</a>
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</li>
|
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|
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<li class="chapter " data-level="8.6" data-path="../nats_streaming/gettingstarted/windows-service.html">
|
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<a href="../nats_streaming/gettingstarted/windows-service.html">
|
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|
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Windows Service
|
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</a>
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</li>
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<li class="chapter " data-level="8.7" data-path="../developer/streaming/embedding.html">
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<a href="../developer/streaming/embedding.html">
|
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Embedding NATS Streaming Server
|
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|
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</a>
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</li>
|
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|
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<li class="chapter " data-level="8.8" data-path="../nats_streaming/swarm.html">
|
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|
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<a href="../nats_streaming/swarm.html">
|
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|
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Docker Swarm
|
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</a>
|
|
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</li>
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|
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<li class="header">NATS Protocol</li>
|
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|
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|
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<li class="chapter " data-level="9.1" data-path="../nats_protocol/nats-protocol-demo.html">
|
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<a href="../nats_protocol/nats-protocol-demo.html">
|
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Protocol Demo
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</a>
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</li>
|
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<li class="chapter " data-level="9.2" data-path="../nats_protocol/nats-protocol.html">
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<a href="../nats_protocol/nats-protocol.html">
|
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Client Protocol
|
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</a>
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<ul class="articles">
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<li class="chapter " data-level="9.2.1" data-path="../nats_protocol/nats-client-dev.html">
|
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<a href="../nats_protocol/nats-client-dev.html">
|
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Developing a Client
|
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="9.3" data-path="../nats_protocol/nats-server-protocol.html">
|
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<a href="../nats_protocol/nats-server-protocol.html">
|
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|
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|
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NATS Cluster Protocol
|
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|
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</a>
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</li>
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<li class="divider"></li>
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<li>
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<a href="https://www.gitbook.com" target="blank" class="gitbook-link">
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Published with GitBook
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</a>
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</li>
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</ul>
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</nav>
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</div>
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<div class="book-body">
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<div class="body-inner">
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<div class="book-header" role="navigation">
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<!-- Title -->
|
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<h1>
|
|
<i class="fa fa-circle-o-notch fa-spin"></i>
|
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<a href=".." >Configuration</a>
|
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</h1>
|
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</div>
|
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<div class="page-wrapper" tabindex="-1" role="main">
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<div class="page-inner">
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<div id="book-search-results">
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<div class="search-noresults">
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<section class="normal markdown-section">
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|
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<h2 id="system-events-tutorial"><a name="system-events-tutorial" class="plugin-anchor" href="#system-events-tutorial"><i class="fa fa-link" aria-hidden="true"></i></a>System Events Tutorial</h2>
|
|
<p>The following is a short tutorial on how you can activate a system account to:</p>
|
|
<ul>
|
|
<li>receive periodic updates from the server</li>
|
|
<li>send requests to the server</li>
|
|
<li>send an account update to the server</li>
|
|
</ul>
|
|
<h3 id="events-and-services"><a name="events-and-services" class="plugin-anchor" href="#events-and-services"><i class="fa fa-link" aria-hidden="true"></i></a>Events and Services</h3>
|
|
<p>The system account publishes messages under well known subject patterns.</p>
|
|
<p>Server initiated events:</p>
|
|
<ul>
|
|
<li><code>$SYS.ACCOUNT.<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>id</span><span class="token punctuation">></span></span>.CONNECT</code> (client connects)</li>
|
|
<li><code>$SYS.ACCOUNT.<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>id</span><span class="token punctuation">></span></span>.DISCONNECT</code> (client disconnects)</li>
|
|
<li><code>$SYS.SERVER.ACCOUNT.<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>id</span><span class="token punctuation">></span></span>.CONNS</code> (connections for an account changed)</li>
|
|
<li><code>$SYS.SERVER.<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>id</span><span class="token punctuation">></span></span>.CLIENT.AUTH.ERR</code> (authentication error)</li>
|
|
<li><code>$SYS.ACCOUNT.<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>id</span><span class="token punctuation">></span></span>.LEAFNODE.CONNECT</code> (leaf node connnects)</li>
|
|
<li><code>$SYS.ACCOUNT.<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>id</span><span class="token punctuation">></span></span>.LEAFNODE.DISCONNECT</code> (leaf node disconnects)</li>
|
|
<li><code>$SYS.SERVER.<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>id</span><span class="token punctuation">></span></span>.STATSZ</code> (stats summary)</li>
|
|
</ul>
|
|
<p>In addition other tools with system account privileges, can initiate requests:</p>
|
|
<ul>
|
|
<li><code>$SYS.REQ.SERVER.<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>id</span><span class="token punctuation">></span></span>.STATSZ</code> (request server stat summary)</li>
|
|
<li><code>$SYS.REQ.SERVER.PING</code> (discover servers - will return multiple messages)</li>
|
|
</ul>
|
|
<p>Servers like <code>nats-account-server</code> publish system account messages when a claim is updated, the nats-server listens for them, and updates its account information accordingly:</p>
|
|
<ul>
|
|
<li><code>$SYS.ACCOUNT.<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>id</span><span class="token punctuation">></span></span>.CLAIMS.UPDATE</code></li>
|
|
</ul>
|
|
<p>With these few messages you can build fairly surprisingly useful monitoring tools:</p>
|
|
<ul>
|
|
<li>health/load of your servers</li>
|
|
<li>client connects/disconnects</li>
|
|
<li>account connections</li>
|
|
<li>authentication errors</li>
|
|
</ul>
|
|
<h3 id="enabling-system-events"><a name="enabling-system-events" class="plugin-anchor" href="#enabling-system-events"><i class="fa fa-link" aria-hidden="true"></i></a>Enabling System Events</h3>
|
|
<p>To enable and access system events, you'll have to:</p>
|
|
<ul>
|
|
<li>Create an Operator, Account and User</li>
|
|
<li>Run a NATS Account Server (or Memory Resolver)</li>
|
|
</ul>
|
|
<h4 id="create-an-operator-account-user"><a name="create-an-operator-account-user" class="plugin-anchor" href="#create-an-operator-account-user"><i class="fa fa-link" aria-hidden="true"></i></a>Create an Operator, Account, User</h4>
|
|
<p>Let's create an operator, system account and system account user:</p>
|
|
<pre class="language-"><code class="lang-text"># Create an operator if you
|
|
> nsc add operator -n SAOP
|
|
Generated operator key - private key stored "~/.nkeys/SAOP/SAOP.nk"
|
|
Success! - added operator "SAOP"
|
|
|
|
# Add the system account
|
|
> nsc add account -n SYS
|
|
Generated account key - private key stored "~/.nkeys/SAOP/accounts/SYS/SYS.nk"
|
|
Success! - added account "SYS"
|
|
|
|
# Add a system account user
|
|
> nsc add user -n SYSU
|
|
Generated user key - private key stored "~/.nkeys/SAOP/accounts/SYS/users/SYSU.nk"
|
|
Generated user creds file "~/.nkeys/SAOP/accounts/SYS/users/SYSU.creds"
|
|
Success! - added user "SYSU" to "SYS"
|
|
</code></pre>
|
|
<p>By default, the operator JWT can be found in <code>~/.nsc/nats/<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>operator_name</span><span class="token punctuation">></span></span>/<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>operator.name</span><span class="token punctuation">></span></span>.jwt</code>.</p>
|
|
<h4 id="nats-account-server"><a name="nats-account-server" class="plugin-anchor" href="#nats-account-server"><i class="fa fa-link" aria-hidden="true"></i></a>Nats-Account-Server</h4>
|
|
<p>To vend the credentials to the nats-server, we'll use a <a href="../nats_tools/nas/">nats-account-server</a>. Let's start a nats-account-server to serve the JWT credentials:</p>
|
|
<pre class="language-"><code class="lang-text">> nats-account-server -nsc ~/.nsc/nats/SAOP
|
|
</code></pre>
|
|
<p>The server will by default vend JWT configurations on the an endpoint at: <code>http(s)://<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>server_url</span><span class="token punctuation">></span></span>/jwt/v1/accounts/</code>.</p>
|
|
<h4 id="nats-server-configuration"><a name="nats-server-configuration" class="plugin-anchor" href="#nats-server-configuration"><i class="fa fa-link" aria-hidden="true"></i></a>NATS Server Configuration</h4>
|
|
<p>The server configuration will need:</p>
|
|
<ul>
|
|
<li>The operator JWT - (<code>~/.nsc/nats/<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>operator_name</span><span class="token punctuation">></span></span>/<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>operator.name</span><span class="token punctuation">></span></span>.jwt</code>)</li>
|
|
<li>The URL where the server can resolve accounts (<code>http://localhost:9090/jwt/v1/accounts/</code>)</li>
|
|
<li>The public key of the <code>system_account</code></li>
|
|
</ul>
|
|
<p>The only thing we don't have handy is the public key for the system account. We can get it easy enough:</p>
|
|
<pre class="language-"><code class="lang-text">> nsc list accounts -W
|
|
╭─────────────────────────────────────────────────────────────────╮
|
|
│ Accounts │
|
|
├──────┬──────────────────────────────────────────────────────────┤
|
|
│ Name │ Public Key │
|
|
├──────┼──────────────────────────────────────────────────────────┤
|
|
│ SYS │ ADWJVSUSEVC2GHL5GRATN2LOEOQOY2E6Z2VXNU3JEIK6BDGPWNIW3AXF │
|
|
╰──────┴──────────────────────────────────────────────────────────╯
|
|
</code></pre>
|
|
<p>Because the server has additional resolver implementations, you need to enclose the server url like: <code>URL(<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>url</span><span class="token punctuation">></span></span>)</code>.</p>
|
|
<p>Let's create server config with the following contents and save it to <code>server.conf</code>:</p>
|
|
<pre class="language-"><code class="lang-text">operator: /Users/synadia/.nsc/nats/SAOP/SAOP.jwt
|
|
system_account: ADWJVSUSEVC2GHL5GRATN2LOEOQOY2E6Z2VXNU3JEIK6BDGPWNIW3AXF
|
|
resolver: URL(http://localhost:9090/jwt/v1/accounts/)
|
|
</code></pre>
|
|
<p>Let's start the nats-server:</p>
|
|
<pre class="language-"><code class="lang-text">> nats-server -c server.conf
|
|
</code></pre>
|
|
<h3 id="inspecting-server-events"><a name="inspecting-server-events" class="plugin-anchor" href="#inspecting-server-events"><i class="fa fa-link" aria-hidden="true"></i></a>Inspecting Server Events</h3>
|
|
<p>Let's add a subscriber for all the events published by the system account:</p>
|
|
<pre class="language-"><code class="lang-text">> nats-sub -creds ~/.nkeys/SAOP/accounts/SYS/users/SYSU.creds ">"
|
|
</code></pre>
|
|
<p>Very quickly we'll start seeing messages from the server as they are published by the NATS server. As should be expected, the messages are just JSON, so they can easily be inspected even if just using a simple <code>nats-sub</code> to read them.</p>
|
|
<p>To see an an account update:</p>
|
|
<pre class="language-"><code class="lang-text">> nats-pub -creds ~/.nkeys/SAOP/accounts/SYS/users/SYSU.creds foo bar
|
|
</code></pre>
|
|
<p>The subscriber will print the connect and disconnect:</p>
|
|
<pre class="language-"><code class="lang-text">[#35] Received on [$SYS.SERVER.ACCOUNT.ADWJVSUSEVC2GHL5GRATN2LOEOQOY2E6Z2VXNU3JEIK6BDGPWNIW3AXF.CONNS]: '{
|
|
"server": {
|
|
"host": "0.0.0.0",
|
|
"id": "NBTGVY3OKDKEAJPUXRHZLKBCRH3LWCKZ6ZXTAJRS2RMYN3PMDRMUZWPR",
|
|
"ver": "2.0.0-RC5",
|
|
"seq": 32,
|
|
"time": "2019-05-03T14:53:15.455266-05:00"
|
|
},
|
|
"acc": "ADWJVSUSEVC2GHL5GRATN2LOEOQOY2E6Z2VXNU3JEIK6BDGPWNIW3AXF",
|
|
"conns": 1,
|
|
"total_conns": 1
|
|
}'
|
|
[#36] Received on [$SYS.ACCOUNT.ADWJVSUSEVC2GHL5GRATN2LOEOQOY2E6Z2VXNU3JEIK6BDGPWNIW3AXF.DISCONNECT]: '{
|
|
"server": {
|
|
"host": "0.0.0.0",
|
|
"id": "NBTGVY3OKDKEAJPUXRHZLKBCRH3LWCKZ6ZXTAJRS2RMYN3PMDRMUZWPR",
|
|
"ver": "2.0.0-RC5",
|
|
"seq": 33,
|
|
"time": "2019-05-03T14:53:15.455304-05:00"
|
|
},
|
|
"client": {
|
|
"start": "2019-05-03T14:53:15.453824-05:00",
|
|
"host": "127.0.0.1",
|
|
"id": 6,
|
|
"acc": "ADWJVSUSEVC2GHL5GRATN2LOEOQOY2E6Z2VXNU3JEIK6BDGPWNIW3AXF",
|
|
"user": "UACPEXCAZEYWZK4O52MEGWGK4BH3OSGYM3P3C3F3LF2NGNZUS24IVG36",
|
|
"name": "NATS Sample Publisher",
|
|
"lang": "go",
|
|
"ver": "1.7.0",
|
|
"stop": "2019-05-03T14:53:15.45526-05:00"
|
|
},
|
|
"sent": {
|
|
"msgs": 1,
|
|
"bytes": 3
|
|
},
|
|
"received": {
|
|
"msgs": 0,
|
|
"bytes": 0
|
|
},
|
|
"reason": "Client Closed"
|
|
}'
|
|
</code></pre>
|
|
<h3 id="sysreqserverping---discovering-servers"><a name="sysreqserverping---discovering-servers" class="plugin-anchor" href="#sysreqserverping---discovering-servers"><i class="fa fa-link" aria-hidden="true"></i></a><code>$SYS.REQ.SERVER.PING</code> - Discovering Servers</h3>
|
|
<p>To discover servers in the cluster, and get a small heath summary, publish a request to <code>$SYS.REQ.SERVER.PING</code>. Note that while the example below uses <code>nats-req</code>, only the first answer for the request will be printed. You can easily modify the example to wait until no additional responses are received for a specific amount of time, thus allowing for all responses to be collected.</p>
|
|
<pre class="language-"><code class="lang-text">> nats-req -creds ~/.nkeys/SAOP/accounts/SYS/users/SYSU.creds \$SYS.REQ.SERVER.PING ""
|
|
Published [$SYS.REQ.SERVER.PING] : ''
|
|
Received [_INBOX.G5mbsf0k7l7nb4eWHa7GTT.omklmvnm] : '{
|
|
"server": {
|
|
"host": "0.0.0.0",
|
|
"id": "NCZQDUX77OSSTGN2ESEOCP4X7GISMARX3H4DBGZBY34VLAI4TQEPK6P6",
|
|
"ver": "2.0.0-RC9",
|
|
"seq": 47,
|
|
"time": "2019-05-02T14:02:46.402166-05:00"
|
|
},
|
|
"statsz": {
|
|
"start": "2019-05-02T13:41:01.113179-05:00",
|
|
"mem": 12922880,
|
|
"cores": 20,
|
|
"cpu": 0,
|
|
"connections": 2,
|
|
"total_connections": 2,
|
|
"active_accounts": 1,
|
|
"subscriptions": 10,
|
|
"sent": {
|
|
"msgs": 7,
|
|
"bytes": 2761
|
|
},
|
|
"received": {
|
|
"msgs": 0,
|
|
"bytes": 0
|
|
},
|
|
"slow_consumers": 0
|
|
}
|
|
}'
|
|
</code></pre>
|
|
<h3 id="sysserveridstatsz---requesting-server-stats-summary"><a name="sysserveridstatsz---requesting-server-stats-summary" class="plugin-anchor" href="#sysserveridstatsz---requesting-server-stats-summary"><i class="fa fa-link" aria-hidden="true"></i></a><code>$SYS.SERVER.<span class="token tag"><span class="token tag"><span class="token punctuation"><</span>id</span><span class="token punctuation">></span></span>.STATSZ</code> - Requesting Server Stats Summary</h3>
|
|
<p>If you know the server id for a particular server (such as from a response to <code>$SYS.REQ.SERVER.PING</code>), you can query the specific server for its health information:</p>
|
|
<pre class="language-"><code class="lang-text">nats-req -creds ~/.nkeys/SAOP/accounts/SYS/users/SYSU.creds \$SYS.REQ.SERVER.NC7AKPQRC6CIZGWRJOTVFIGVSL7VW7WXTQCTUJFNG7HTCMCKQTGE5PUL.STATSZ ""
|
|
Published [$SYS.REQ.SERVER.NC7AKPQRC6CIZGWRJOTVFIGVSL7VW7WXTQCTUJFNG7HTCMCKQTGE5PUL.STATSZ] : ''
|
|
Received [_INBOX.DQD44ugVt0O4Ur3pWIOOD1.WQOBevoq] : '{
|
|
"server": {
|
|
"host": "0.0.0.0",
|
|
"id": "NC7AKPQRC6CIZGWRJOTVFIGVSL7VW7WXTQCTUJFNG7HTCMCKQTGE5PUL",
|
|
"ver": "2.0.0-RC5",
|
|
"seq": 25,
|
|
"time": "2019-05-03T14:34:02.066077-05:00"
|
|
},
|
|
"statsz": {
|
|
"start": "2019-05-03T14:32:19.969037-05:00",
|
|
"mem": 11874304,
|
|
"cores": 20,
|
|
"cpu": 0,
|
|
"connections": 2,
|
|
"total_connections": 4,
|
|
"active_accounts": 1,
|
|
"subscriptions": 10,
|
|
"sent": {
|
|
"msgs": 26,
|
|
"bytes": 9096
|
|
},
|
|
"received": {
|
|
"msgs": 2,
|
|
"bytes": 0
|
|
},
|
|
"slow_consumers": 0
|
|
}
|
|
}'
|
|
</code></pre>
|
|
|
|
|
|
</section>
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var gitbook = gitbook || [];
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gitbook.push(function() {
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gitbook.page.hasChanged({"page":{"title":"Configuration","level":"4.6.4.1","depth":3,"next":{"title":"NATS and Docker","level":"4.7","depth":1,"path":"nats_docker/README.md","ref":"nats_docker/README.md","articles":[{"title":"Tutorial","level":"4.7.1","depth":2,"path":"nats_docker/nats-docker-tutorial.md","ref":"nats_docker/nats-docker-tutorial.md","articles":[]},{"title":"Docker Swarm","level":"4.7.2","depth":2,"path":"nats_docker/docker_swarm.md","ref":"nats_docker/docker_swarm.md","articles":[]}]},"previous":{"title":"System Accounts","level":"4.6.4","depth":2,"path":"sys_accounts/README.md","ref":"sys_accounts/README.md","articles":[{"title":"Configuration","level":"4.6.4.1","depth":3,"path":"sys_accounts/sys_accounts.md","ref":"sys_accounts/sys_accounts.md","articles":[]}]},"dir":"ltr"},"config":{"plugins":["prism","-sharing","-highlight","include-html","toggle-chapters","anchors","edit-link"],"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"pluginsConfig":{"prism":{"lang":{"ascii":"markup","text":"markup"}},"search":{},"lunr":{"maxIndexSize":1000000,"ignoreSpecialCharacters":false},"include-html":{},"fontsettings":{"theme":"white","family":"sans","size":2},"edit-link":{"label":"edit","base":"https://github.com/nats-io/docs/edit/master"},"theme-default":{"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"showLevel":false},"anchors":{},"toggle-chapters":{}},"theme":"default","author":"The NATS Maintainers","pdf":{"pageNumbers":true,"fontSize":12,"fontFamily":"Arial","paperSize":"a4","chapterMark":"pagebreak","pageBreaksBefore":"/","margin":{"right":62,"left":62,"top":56,"bottom":56}},"structure":{"langs":"LANGS.md","readme":"README.md","glossary":"GLOSSARY.md","summary":"SUMMARY.md"},"variables":{},"title":"NATS","gitbook":"*","description":"Administrative, developer and conceptual documentation for the NATS messaging system."},"file":{"path":"sys_accounts/sys_accounts.md","mtime":"2019-09-23T22:49:18.496Z","type":"markdown"},"gitbook":{"version":"3.2.3","time":"2019-09-27T21:13:11.925Z"},"basePath":"..","book":{"language":""}});
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});
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};
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function updateLanguageParameter(value) {
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const param = "lang";
|
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if (window.location.href.indexOf("?") >= 0) {
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const regExp = new RegExp(param + "(.+?)(&|$)", "g");
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const newUrl = window.location.href.replace(regExp, param + "=" + encodeURIComponent(value) + "$2");
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window.history.pushState("", "", newUrl);
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} else {
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const newUrl = window.location.href + "?" + param + "=" + encodeURIComponent(value);
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window.history.pushState("", "", newUrl);
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}
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}
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function getLanguageParameter() {
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var match = RegExp('[?&]lang=([^&]*)').exec(window.location.search);
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return match && decodeURIComponent(match[1].replace(/\+/g, ' '));
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}
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function docReady() {
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window.gitbook.events.bind("page.change", function () {
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});
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}
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}
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function pageChanged() {
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var logos = document.querySelectorAll(".nats");
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if (logos && logos.length == 0) {
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gitbook.toolbar.createButton({
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icon: 'nats',
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label: 'NATS Home Page',
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position: 'right',
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onClick: function () {
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var win = window.open("https://nats.io/", '_blank');
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win.focus();
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}
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document.querySelectorAll('.js-copy').forEach(elem => {
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copyToClipboard(text, el);
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document.querySelectorAll('.api-lang').forEach(elem => {
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elem.addEventListener("click", function () {
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var curLang = sessionStorage.getItem('nats-api-language');
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var lang = this.getAttribute('data-language');
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// Stop the infinite loop
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if (curLang == lang) {
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sessionStorage.setItem('nats-api-language', lang); // So we only do this 1x
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updateLanguageParameter(lang)
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document.querySelectorAll('.api-lang[data-language=' + lang + ']').forEach(elem => {
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elem.click();
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});
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if (sessionStorage) {
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var curLang = sessionStorage.getItem('nats-api-language');
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var queryLang = getLanguageParameter();
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var lang = curLang;
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if (queryLang) { // query takes precedent
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lang = queryLang
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}
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if (lang) {
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document.querySelectorAll('.api-lang[data-language=' + lang + ']').forEach(elem => {
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elem.click();
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setTimeout(function () {
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processGraphVizSections();
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if (document.readyState != 'loading') docReady();
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display: inline-block;
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width: 16px;
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height: 16px;
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background: url(https://nats.io/img/nats-icon-color.svg);
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.tab+label {
|
|
box-shadow: 0 -1px 0 #eee inset;
|
|
border-radius: 6px 6px 0 0;
|
|
cursor: pointer;
|
|
display: block;
|
|
text-decoration: none;
|
|
color: #27aae1;
|
|
flex-grow: 3;
|
|
text-align: center;
|
|
-webkit-user-select: none;
|
|
-moz-user-select: none;
|
|
-ms-user-select: none;
|
|
user-select: none;
|
|
text-align: center;
|
|
transition: 0.3s background-color ease, 0.3s box-shadow ease;
|
|
height: 50px;
|
|
box-sizing: border-box;
|
|
padding: 15px;
|
|
}
|
|
|
|
.tab+label:hover {
|
|
background-color: #f9f9f9;
|
|
box-shadow: 0 1px 0 #f4f4f4 inset;
|
|
}
|
|
|
|
.tab__content {
|
|
padding: 2px 2px;
|
|
background-color: transparent;
|
|
position: absolute;
|
|
width: 100%;
|
|
z-index: -1;
|
|
opacity: 0;
|
|
left: 0;
|
|
-webkit-transform: translateY(-3px);
|
|
transform: translateY(-3px);
|
|
border-radius: 6px;
|
|
}
|
|
|
|
.tab__content pre {
|
|
margin-bottom: 0px !important;
|
|
}
|
|
|
|
.toolbar-icons {
|
|
display: inline-block;
|
|
position: relative;
|
|
padding-left: 4px;
|
|
}
|
|
|
|
a.toolbar-icons {
|
|
text-decoration: none;
|
|
}
|
|
|
|
.toolbar-icons .mdi {
|
|
color: #4183c4;
|
|
}
|
|
|
|
.copy-msg {
|
|
color: #4183c4;
|
|
}
|
|
|
|
.pull-right {
|
|
float: right !important;
|
|
}
|
|
|
|
.pull-left {
|
|
float: left !important;
|
|
}
|
|
</style>
|
|
<!-- Global site tag (gtag.js) - Google Analytics -->
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<script async src="https://www.googletagmanager.com/gtag/js?id=UA-111730698-1"></script>
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<script>
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window.dataLayer = window.dataLayer || [];
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|
function gtag(){dataLayer.push(arguments);}
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|
gtag('js', new Date());
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|
|
|
gtag('config', 'UA-111730698-1');
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|
</script>
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|
|
|
|
|
<script src="../gitbook/gitbook.js"></script>
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|
<script src="../gitbook/theme.js"></script>
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|
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<script src="../gitbook/gitbook-plugin-toggle-chapters/toggle.js"></script>
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|
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<script src="../gitbook/gitbook-plugin-edit-link/plugin.js"></script>
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|
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<script src="../gitbook/gitbook-plugin-search/search-engine.js"></script>
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|
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|
<script src="../gitbook/gitbook-plugin-search/search.js"></script>
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|
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|
<script src="../gitbook/gitbook-plugin-lunr/lunr.min.js"></script>
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|
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|
<script src="../gitbook/gitbook-plugin-lunr/search-lunr.js"></script>
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|
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<script src="../gitbook/gitbook-plugin-fontsettings/fontsettings.js"></script>
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</body>
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|
</html>
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