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Introduction
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What's New in 2.0
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FAQ
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<li class="header">Concepts</li>
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What is NATS
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Subject-Based Messaging
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Publish-Subscribe
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Request-Reply
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Queue Groups
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Acknowledgements
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Sequence Numbers
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Introduction
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Connecting
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Connecting to the Default Server
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Connecting to a Specific Server
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Connecting to a Cluster
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Setting a Connect Timeout
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Ping/Pong Protocol
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Controlling the Client/Server Protocol
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Turning Off Echo'd Messages
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Automatic Reconnections
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Disabling Reconnect
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Set the Number of Reconnect Attempts
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Pausing Between Reconnect Attempts
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Avoiding the Thundering Herd
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Listening for Reconnect Events
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Buffering Messages During Reconnect Attempts
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Securing Connections
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Authenticating with a User and Password
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Authenticating with a Token
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Authenticating with an NKey
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Authenticating with a Credentials File
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Encrypting Connections with TLS
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Receiving Messages
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Synchronous Subscriptions
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Asynchronous Subscriptions
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Unsubscribing
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Unsubscribing After N Messages
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Replying to a Message
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Wildcard Subscriptions
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Queue Subscriptions
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Draining Messages Before Disconnect
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Structured Data
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Sending Messages
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Including a Reply Subject
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<a href="../../developer/sending/request_reply.html">
Request-Reply Semantics
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Caches, Flush and Ping
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Sending Structured Data
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</ul>
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<li class="chapter " data-level="3.7" data-path="../../developer/events/intro.html">
<a href="../../developer/events/intro.html">
Monitoring the Connection
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<li class="chapter " data-level="3.7.1" data-path="../../developer/events/events.html">
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Listen for Connection Events
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Slow Consumers
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Tutorials
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<a href="../../developer/tutorials/pubsub.html">
Explore NATS Pub/Sub
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<a href="../../developer/tutorials/reqreply.html">
Explore NATS Request/Reply
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<a href="../../developer/tutorials/queues.html">
Explore NATS Queueing
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Advanced Connect and Custom Dialer in Go
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<li class="header">NATS Server</li>
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Installing
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Running
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Window Service
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Clients
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Flags
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Configuration
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Securing NATS
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<a href="../../nats_server/tls.html">
Enabling TLS
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Authentication
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Tokens
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Username/Password
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<a href="../../nats_server/tls_mutual_auth.html">
TLS Authentication
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<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
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<a href="../../nats_server/accounts.html">
Accounts
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<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="../../sys_accounts/">
<a href="../../sys_accounts/">
System Accounts
</a>
<ul class="articles">
<li class="chapter " data-level="4.6.4.1" data-path="../../sys_accounts/sys_accounts.html">
<a href="../../sys_accounts/sys_accounts.html">
Configuration
</a>
</li>
</ul>
</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="../mkpasswd.html">
<a href="../mkpasswd.html">
mkpasswd
</a>
</li>
<li class="chapter " data-level="5.2" data-path="../nk.html">
<a href="../nk.html">
nk
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<li class="chapter " data-level="5.3" data-path="../nsc/">
<a href="../nsc/">
nsc
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<ul class="articles">
<li class="chapter " data-level="5.3.1" data-path="../nsc/nsc.html">
<a href="../nsc/nsc.html">
Basics
</a>
</li>
<li class="chapter " data-level="5.3.2" data-path="../nsc/streams.html">
<a href="../nsc/streams.html">
Streams
</a>
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<li class="chapter " data-level="5.3.3" data-path="../nsc/services.html">
<a href="../nsc/services.html">
Services
</a>
</li>
<li class="chapter " data-level="5.3.4" data-path="../nsc/signing_keys.html">
<a href="../nsc/signing_keys.html">
Signing Keys
</a>
</li>
<li class="chapter " data-level="5.3.5" data-path="../nsc/revocation.html">
<a href="../nsc/revocation.html">
Revocation
</a>
</li>
<li class="chapter " data-level="5.3.6" data-path="../nsc/managed.html">
<a href="../nsc/managed.html">
Managed Operators
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.4" data-path="./">
<a href="./">
nats-account-server
</a>
<ul class="articles">
<li class="chapter " data-level="5.4.1" data-path="nas_conf.html">
<a href="nas_conf.html">
Basics
</a>
</li>
<li class="chapter " data-level="5.4.2" data-path="inspecting_jwts.html">
<a href="inspecting_jwts.html">
Inspecting JWTs
</a>
</li>
<li class="chapter " data-level="5.4.3" data-path="dir_store.html">
<a href="dir_store.html">
Directory Store
</a>
</li>
<li class="chapter " data-level="5.4.4" data-path="notifications.html">
<a href="notifications.html">
Update Notifications
</a>
</li>
<li class="chapter active" data-level="5.4.5" data-path="mem_resolver.html">
<a href="mem_resolver.html">
Memory Resolver
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.5" data-path="../nats_top/">
<a href="../nats_top/">
nats-top
</a>
<ul class="articles">
<li class="chapter " data-level="5.5.1" data-path="../nats_top/nats-top-tutorial.html">
<a href="../nats_top/nats-top-tutorial.html">
Tutorial
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.6" data-path="../natsbench.html">
<a href="../natsbench.html">
nats-bench
</a>
</li>
<li class="header">NATS Streaming Concepts</li>
<li class="chapter " data-level="6.1" data-path="../../nats_streaming/intro.html">
<a href="../../nats_streaming/intro.html">
Introduction
</a>
</li>
<li class="chapter " data-level="6.2" data-path="../../nats_streaming/relation-to-nats.html">
<a href="../../nats_streaming/relation-to-nats.html">
Relation to NATS
</a>
</li>
<li class="chapter " data-level="6.3" data-path="../../nats_streaming/client-connections.html">
<a href="../../nats_streaming/client-connections.html">
Client Connections
</a>
</li>
<li class="chapter " data-level="6.4" data-path="../../nats_streaming/channels/channels.html">
<a href="../../nats_streaming/channels/channels.html">
Channels
</a>
<ul class="articles">
<li class="chapter " data-level="6.4.1" data-path="../../nats_streaming/channels/message-log.html">
<a href="../../nats_streaming/channels/message-log.html">
Message Log
</a>
</li>
<li class="chapter " data-level="6.4.2" data-path="../../nats_streaming/channels/subscriptions/subscriptions.html">
<a href="../../nats_streaming/channels/subscriptions/subscriptions.html">
Subscriptions
</a>
<ul class="articles">
<li class="chapter " data-level="6.4.2.1" data-path="../../nats_streaming/channels/subscriptions/regular.html">
<a href="../../nats_streaming/channels/subscriptions/regular.html">
Regular
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</li>
<li class="chapter " data-level="6.4.2.2" data-path="../../nats_streaming/channels/subscriptions/durable.html">
<a href="../../nats_streaming/channels/subscriptions/durable.html">
Durable
</a>
</li>
<li class="chapter " data-level="6.4.2.3" data-path="../../nats_streaming/channels/subscriptions/queue-group.html">
<a href="../../nats_streaming/channels/subscriptions/queue-group.html">
Queue Group
</a>
</li>
<li class="chapter " data-level="6.4.2.4" data-path="../../nats_streaming/channels/subscriptions/redelivery.html">
<a href="../../nats_streaming/channels/subscriptions/redelivery.html">
Redelivery
</a>
</li>
</ul>
</li>
</ul>
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<li class="chapter " data-level="6.5" data-path="../../nats_streaming/store-interface.html">
<a href="../../nats_streaming/store-interface.html">
Store Interface
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</li>
<li class="chapter " data-level="6.6" data-path="../../nats_streaming/store-encryption.html">
<a href="../../nats_streaming/store-encryption.html">
Store Encryption
</a>
</li>
<li class="chapter " data-level="6.7" data-path="../../nats_streaming/clustering/clustering.html">
<a href="../../nats_streaming/clustering/clustering.html">
Clustering
</a>
<ul class="articles">
<li class="chapter " data-level="6.7.1" data-path="../../nats_streaming/clustering/supported-stores.html">
<a href="../../nats_streaming/clustering/supported-stores.html">
Supported Stores
</a>
</li>
<li class="chapter " data-level="6.7.2" data-path="../../nats_streaming/clustering/configuration.html">
<a href="../../nats_streaming/clustering/configuration.html">
Configuration
</a>
</li>
<li class="chapter " data-level="6.7.3" data-path="../../nats_streaming/clustering/auto-configuration.html">
<a href="../../nats_streaming/clustering/auto-configuration.html">
Auto Configuration
</a>
</li>
<li class="chapter " data-level="6.7.4" data-path="../../nats_streaming/clustering/containers.html">
<a href="../../nats_streaming/clustering/containers.html">
Containers
</a>
</li>
</ul>
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<li class="chapter " data-level="6.8" data-path="../../nats_streaming/fault-tolerance/ft.html">
<a href="../../nats_streaming/fault-tolerance/ft.html">
Fault Tolerance
</a>
<ul class="articles">
<li class="chapter " data-level="6.8.1" data-path="../../nats_streaming/fault-tolerance/active-server.html">
<a href="../../nats_streaming/fault-tolerance/active-server.html">
Active Server
</a>
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<li class="chapter " data-level="6.8.2" data-path="../../nats_streaming/fault-tolerance/standby-server.html">
<a href="../../nats_streaming/fault-tolerance/standby-server.html">
Standby Servers
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<li class="chapter " data-level="6.8.3" data-path="../../nats_streaming/fault-tolerance/shared-state.html">
<a href="../../nats_streaming/fault-tolerance/shared-state.html">
Shared State
</a>
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<a href="../../nats_streaming/fault-tolerance/failover.html">
Failover
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</li>
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<a href="../../nats_streaming/partitioning.html">
Partitioning
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<li class="chapter " data-level="6.10" data-path="../../nats_streaming/monitoring/monitoring.html">
<a href="../../nats_streaming/monitoring/monitoring.html">
Monitoring
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<ul class="articles">
<li class="chapter " data-level="6.10.1" data-path="../../nats_streaming/monitoring/endpoints.html">
<a href="../../nats_streaming/monitoring/endpoints.html">
Endpoints
</a>
</li>
</ul>
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<li class="header">Developing With NATS Streaming</li>
<li class="chapter " data-level="7.1" data-path="../../developer/streaming/">
<a href="../../developer/streaming/">
Introduction
</a>
</li>
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<a href="../../developer/streaming/connecting.html">
Connecting to NATS Streaming
</a>
</li>
<li class="chapter " data-level="7.3" data-path="../../developer/streaming/publishing.html">
<a href="../../developer/streaming/publishing.html">
Publishing to a Channel
</a>
</li>
<li class="chapter " data-level="7.4" data-path="../../developer/streaming/receiving.html">
<a href="../../developer/streaming/receiving.html">
Receiving Messages from a Channel
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</li>
<li class="chapter " data-level="7.5" data-path="../../developer/streaming/durables.html">
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Durable Subscriptions
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<a href="../../developer/streaming/queues.html">
Queue Subscriptions
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</li>
<li class="chapter " data-level="7.7" data-path="../../developer/streaming/acks.html">
<a href="../../developer/streaming/acks.html">
Acknowledgements
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<a href="../../developer/streaming/protocol.html">
The Streaming Protocol
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<li class="header">NATS Streaming Server</li>
<li class="chapter " data-level="8.1" data-path="../../nats_streaming/gettingstarted/changes.html">
<a href="../../nats_streaming/gettingstarted/changes.html">
Important Changes
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<a href="../../nats_streaming/gettingstarted/install.html">
Installing
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<a href="../../nats_streaming/gettingstarted/run.html">
Running
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<li class="chapter " data-level="8.4" data-path="../../nats_streaming/configuring/configuring.html">
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Configuring
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Command line arguments
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<a href="../../nats_streaming/configuring/cfgfile.html">
Configuration file
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<a href="../../nats_streaming/configuring/storelimits.html">
Store Limits
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<a href="../../nats_streaming/configuring/storelimits.html#limits-inheritance">
Limits inheritance
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Persistence
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File Store
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Options
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Recovery Errors
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SQL Store
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Read and Write Timeouts
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Options
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Securing
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Authenticating Users
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TLS
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Process Signaling
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<h1>
<i class="fa fa-circle-o-notch fa-spin"></i>
<a href="../.." >Memory Resolver</a>
</h1>
</div>
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<div class="page-inner">
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<section class="normal markdown-section">
<h2 id="memory-resolver"><a name="memory-resolver" class="plugin-anchor" href="#memory-resolver"><i class="fa fa-link" aria-hidden="true"></i></a>Memory Resolver</h2>
<p>The <code>MEMORY</code> resolver is a built-in resolver for JWTs. It is mostly used by test setups but can be used to test the simplest of environments where there is one or very few accounts, and the account JWTs don&apos;t change often.</p>
<p>The basic configuration for the server requires:</p>
<ul>
<li>The operator JWT</li>
<li><code>resolver</code> set to <code>MEMORY</code></li>
<li><code>resolver_preload</code> set to an object where account public keys are mapped to account JWTs.</li>
</ul>
<h3 id="create-required-entities"><a name="create-required-entities" class="plugin-anchor" href="#create-required-entities"><i class="fa fa-link" aria-hidden="true"></i></a>Create Required Entities</h3>
<p>Let&apos;s create the setup:</p>
<pre class="language-"><code class="lang-text">&gt; nsc add operator -n memory
Generated operator key - private key stored &quot;~/.nkeys/memory/memory.nk&quot;
Success! - added operator &quot;memory&quot;
&gt; nsc add account --name A
Generated account key - private key stored &quot;~/.nkeys/memory/accounts/A/A.nk&quot;
Success! - added account &quot;A&quot;
&gt; nsc describe account -W
&#x256D;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x256E;
&#x2502; Account Details &#x2502;
&#x251C;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x252C;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2524;
&#x2502; Name &#x2502; A &#x2502;
&#x2502; Account ID &#x2502; ACSU3Q6LTLBVLGAQUONAGXJHVNWGSKKAUA7IY5TB4Z7PLEKSR5O6JTGR &#x2502;
&#x2502; Issuer ID &#x2502; ODWZJ2KAPF76WOWMPCJF6BY4QIPLTUIY4JIBLU4K3YDG3GHIWBVWBHUZ &#x2502;
&#x2502; Issued &#x2502; 2019-04-30 20:21:34 UTC &#x2502;
&#x2502; Expires &#x2502; &#x2502;
&#x251C;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x253C;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2524;
&#x2502; Max Connections &#x2502; Unlimited &#x2502;
&#x2502; Max Leaf Node Connections &#x2502; Unlimited &#x2502;
&#x2502; Max Data &#x2502; Unlimited &#x2502;
&#x2502; Max Exports &#x2502; Unlimited &#x2502;
&#x2502; Max Imports &#x2502; Unlimited &#x2502;
&#x2502; Max Msg Payload &#x2502; Unlimited &#x2502;
&#x2502; Max Subscriptions &#x2502; Unlimited &#x2502;
&#x2502; Exports Allows Wildcards &#x2502; True &#x2502;
&#x251C;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x253C;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2524;
&#x2502; Imports &#x2502; None &#x2502;
&#x2502; Exports &#x2502; None &#x2502;
&#x2570;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2534;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x2500;&#x256F;
&gt; nsc add user --name TA
Generated user key - private key stored &quot;~/.nkeys/memory/accounts/A/users/TA.nk&quot;
Generated user creds file &quot;~/.nkeys/memory/accounts/A/users/TA.creds&quot;
Success! - added user &quot;TA&quot; to &quot;A&quot;
</code></pre>
<h3 id="create-the-server-config"><a name="create-the-server-config" class="plugin-anchor" href="#create-the-server-config"><i class="fa fa-link" aria-hidden="true"></i></a>Create the Server Config</h3>
<p>The <code>nsc</code> tool can generate a configuration file automatically. You provide a path to the server configuration and operator jwt. The <code>nsc</code> tool will copy the operator JWT to the file specified, and generate the server config for you:</p>
<pre class="language-"><code>&gt; nsc generate config --mem-resolver --config-file /tmp/server.conf --operator-jwt /tmp/memory.jwt
Success!! - generated &quot;/tmp/server.conf&quot;
generated &quot;/tmp/memory.jwt&quot;
</code></pre><p>If you require additional settings, you may want to consider using <a href="../../nats_server/configuration.html#include-directive"><code>include</code></a> in your main configuration, to reference the generated files. Otherwise, you can start a server and reference the generated configuration:</p>
<pre class="language-"><code>&gt; nats-server -c /tmp/server.conf
</code></pre><p>You can then <a href="#testing-the-configuration">test it</a>.</p>
<h3 id="manual-server-config"><a name="manual-server-config" class="plugin-anchor" href="#manual-server-config"><i class="fa fa-link" aria-hidden="true"></i></a>Manual Server Config</h3>
<p>While generating a configuration file is easy, you may want to craft one by hand to know the details. With the entities created, and a standard location for the <code>.nsc</code> directory. You can reference the operator JWT and the account JWT in a server configuration. Remember that your configuration will be in <code>$NSC_HOME/nats/<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>operator_name</span><span class="token punctuation">&gt;</span></span>/<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>operator_name</span><span class="token punctuation">&gt;</span></span>.jwt</code> for the operator. The account JWT will be in <code>$NSC_HOME/nats/<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>operator_name</span><span class="token punctuation">&gt;</span></span>/accounts/<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>account_name</span><span class="token punctuation">&gt;</span></span>/<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>account_name</span><span class="token punctuation">&gt;</span></span>.jwt</code></p>
<p>For the configuration you&apos;ll need:</p>
<ul>
<li>The path to the operator JWT</li>
<li>A copy of the contents of the account JWT file</li>
</ul>
<p>The format of the file is:</p>
<pre class="language-"><code>operator: <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>path</span> <span class="token attr-name">to</span> <span class="token attr-name">the</span> <span class="token attr-name">operator</span> <span class="token attr-name">jwt</span><span class="token punctuation">&gt;</span></span>
resolver: MEMORY
resolver_preload: {
<span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>public</span> <span class="token attr-name">key</span> <span class="token attr-name">for</span> <span class="token attr-name">an</span> <span class="token attr-name">account</span><span class="token punctuation">&gt;</span></span>: <span class="token tag"><span class="token tag"><span class="token punctuation">&lt;</span>contents</span> <span class="token attr-name">of</span> <span class="token attr-name">the</span> <span class="token attr-name">account</span> <span class="token attr-name">jwt</span><span class="token punctuation">&gt;</span></span>
### add as many accounts as you want
...
}
</code></pre><p>In this example this translates to:</p>
<pre class="language-"><code class="lang-text">operator: /Users/synadia/.nsc/nats/memory/memory.jwt
resolver: MEMORY
resolver_preload: {
ACSU3Q6LTLBVLGAQUONAGXJHVNWGSKKAUA7IY5TB4Z7PLEKSR5O6JTGR: eyJ0eXAiOiJqd3QiLCJhbGciOiJlZDI1NTE5In0.eyJqdGkiOiJPRFhJSVI2Wlg1Q1AzMlFJTFczWFBENEtTSDYzUFNNSEZHUkpaT05DR1RLVVBISlRLQ0JBIiwiaWF0IjoxNTU2NjU1Njk0LCJpc3MiOiJPRFdaSjJLQVBGNzZXT1dNUENKRjZCWTRRSVBMVFVJWTRKSUJMVTRLM1lERzNHSElXQlZXQkhVWiIsIm5hbWUiOiJBIiwic3ViIjoiQUNTVTNRNkxUTEJWTEdBUVVPTkFHWEpIVk5XR1NLS0FVQTdJWTVUQjRaN1BMRUtTUjVPNkpUR1IiLCJ0eXBlIjoiYWNjb3VudCIsIm5hdHMiOnsibGltaXRzIjp7InN1YnMiOi0xLCJjb25uIjotMSwibGVhZiI6LTEsImltcG9ydHMiOi0xLCJleHBvcnRzIjotMSwiZGF0YSI6LTEsInBheWxvYWQiOi0xLCJ3aWxkY2FyZHMiOnRydWV9fX0._WW5C1triCh8a4jhyBxEZZP8RJ17pINS8qLzz-01o6zbz1uZfTOJGvwSTS6Yv2_849B9iUXSd-8kp1iMXHdoBA
}
</code></pre>
<p>Save the config at server.conf and start the server:</p>
<pre class="language-"><code class="lang-text">&gt; nats-server -c server.conf
</code></pre>
<p>You can then <a href="#testing-the-configuration">test it</a>.</p>
<h3 id="testing-the-configuration"><a name="testing-the-configuration" class="plugin-anchor" href="#testing-the-configuration"><i class="fa fa-link" aria-hidden="true"></i></a>Testing the Configuration</h3>
<p>To test the configuration, simply use one of the standard tools:</p>
<pre class="language-"><code class="lang-text">&gt; nats-pub -creds ~/.nkeys/memory/accounts/A/users/TA.creds hello world
Published [hello] : &apos;world&apos;
</code></pre>
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