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<title>Durable Subscriptions ยท NATS</title>
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Introduction
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What's New in 2.0
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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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Enabling TLS
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Authentication
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Tokens
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Username/Password
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TLS Authentication
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NKeys
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Accounts
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Authentication Timeout
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Authorization
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Clustering
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Configuration
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TLS Authentication
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Gateways
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Configuration
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Leaf Nodes
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Configuration
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Logging
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Monitoring
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Managing A NATS Server
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Upgrading a Cluster
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Slow Consumers
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Signals
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System Accounts
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Configuration
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NATS and Docker
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Tutorial
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Docker Swarm
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<li class="header">NATS Streaming Server</li>
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Basics
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Installing
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Securing
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Protocol
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Docker Swarm
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<li class="header">NATS Tools</li>
<li class="chapter " data-level="4.1" data-path="../../nats_tools/mkpasswd.html">
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mkpasswd
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nk
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nsc
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Basics
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<li class="chapter " data-level="4.3.2" data-path="../../nats_tools/nsc/streams.html">
<a href="../../nats_tools/nsc/streams.html">
Streams
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<a href="../../nats_tools/nsc/services.html">
Services
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<li class="chapter " data-level="4.3.4" data-path="../../nats_tools/nsc/signing_keys.html">
<a href="../../nats_tools/nsc/signing_keys.html">
Signing Keys
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="4.4" data-path="../../nats_tools/nas/">
<a href="../../nats_tools/nas/">
nats-account-server
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<li class="chapter " data-level="4.4.1" data-path="../../nats_tools/nas/nas_conf.html">
<a href="../../nats_tools/nas/nas_conf.html">
Basics
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<a href="../../nats_tools/nas/inspecting_jwts.html">
Inspecting JWTs
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Memory Resolver
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<li class="chapter " data-level="4.5" data-path="../../nats_tools/nats_top/">
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nats-top
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Tutorial
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nats-bench
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<li class="header">Developing With NATS</li>
<li class="chapter " data-level="5.1" data-path="../">
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Introduction
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Concepts
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Subject-Based Messaging
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<a href="../concepts/pubsub.html">
Publish-Subscribe
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</li>
<li class="chapter " data-level="5.2.3" data-path="../concepts/reqreply.html">
<a href="../concepts/reqreply.html">
Request-Reply
</a>
</li>
<li class="chapter " data-level="5.2.4" data-path="../concepts/queue.html">
<a href="../concepts/queue.html">
Queue Groups
</a>
</li>
<li class="chapter " data-level="5.2.5" data-path="../concepts/acks.html">
<a href="../concepts/acks.html">
Acknowledgements
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</li>
<li class="chapter " data-level="5.2.6" data-path="../concepts/seq_num.html">
<a href="../concepts/seq_num.html">
Sequence Numbers
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.3" data-path="../connecting/intro.html">
<a href="../connecting/intro.html">
Connecting
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<li class="chapter " data-level="5.3.1" data-path="../connecting/default_server.html">
<a href="../connecting/default_server.html">
Connecting to the Default Server
</a>
</li>
<li class="chapter " data-level="5.3.2" data-path="../connecting/specific_server.html">
<a href="../connecting/specific_server.html">
Connecting to a Specific Server
</a>
</li>
<li class="chapter " data-level="5.3.3" data-path="../connecting/cluster.html">
<a href="../connecting/cluster.html">
Connecting to a Cluster
</a>
</li>
<li class="chapter " data-level="5.3.4" data-path="../connecting/connect_timeout.html">
<a href="../connecting/connect_timeout.html">
Setting a Connect Timeout
</a>
</li>
<li class="chapter " data-level="5.3.5" data-path="../connecting/pingpong.html">
<a href="../connecting/pingpong.html">
Ping/Pong Protocol
</a>
</li>
<li class="chapter " data-level="5.3.6" data-path="../connecting/protocol.html">
<a href="../connecting/protocol.html">
Controlling the Client/Server Protocol
</a>
</li>
<li class="chapter " data-level="5.3.7" data-path="../connecting/noecho.html">
<a href="../connecting/noecho.html">
Turning Off Echo'd Messages
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.4" data-path="../reconnect/intro.html">
<a href="../reconnect/intro.html">
Automatic Reconnections
</a>
<ul class="articles">
<li class="chapter " data-level="5.4.1" data-path="../reconnect/disable.html">
<a href="../reconnect/disable.html">
Disabling Reconnect
</a>
</li>
<li class="chapter " data-level="5.4.2" data-path="../reconnect/max.html">
<a href="../reconnect/max.html">
Set the Number of Reconnect Attempts
</a>
</li>
<li class="chapter " data-level="5.4.3" data-path="../reconnect/wait.html">
<a href="../reconnect/wait.html">
Pausing Between Reconnect Attempts
</a>
</li>
<li class="chapter " data-level="5.4.4" data-path="../reconnect/random.html">
<a href="../reconnect/random.html">
Avoiding the Thundering Herd
</a>
</li>
<li class="chapter " data-level="5.4.5" data-path="../reconnect/events.html">
<a href="../reconnect/events.html">
Listening for Reconnect Events
</a>
</li>
<li class="chapter " data-level="5.4.6" data-path="../reconnect/buffer.html">
<a href="../reconnect/buffer.html">
Buffering Messages During Reconnect Attempts
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.5" data-path="../security/intro.html">
<a href="../security/intro.html">
Securing Connections
</a>
<ul class="articles">
<li class="chapter " data-level="5.5.1" data-path="../security/userpass.html">
<a href="../security/userpass.html">
Authenticating with a User and Password
</a>
</li>
<li class="chapter " data-level="5.5.2" data-path="../security/token.html">
<a href="../security/token.html">
Authenticating with a Token
</a>
</li>
<li class="chapter " data-level="5.5.3" data-path="../security/nkey.html">
<a href="../security/nkey.html">
Authenticating with an NKey
</a>
</li>
<li class="chapter " data-level="5.5.4" data-path="../security/creds.html">
<a href="../security/creds.html">
Authenticating with a Credentials File
</a>
</li>
<li class="chapter " data-level="5.5.5" data-path="../security/tls.html">
<a href="../security/tls.html">
Encrypting Connections with TLS
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.6" data-path="../receiving/intro.html">
<a href="../receiving/intro.html">
Receiving Messages
</a>
<ul class="articles">
<li class="chapter " data-level="5.6.1" data-path="../receiving/sync.html">
<a href="../receiving/sync.html">
Synchronous Subscriptions
</a>
</li>
<li class="chapter " data-level="5.6.2" data-path="../receiving/async.html">
<a href="../receiving/async.html">
Asynchronous Subscriptions
</a>
</li>
<li class="chapter " data-level="5.6.3" data-path="../receiving/unsubscribing.html">
<a href="../receiving/unsubscribing.html">
Unsubscribing
</a>
</li>
<li class="chapter " data-level="5.6.4" data-path="../receiving/unsub_after.html">
<a href="../receiving/unsub_after.html">
Unsubscribing After N Messages
</a>
</li>
<li class="chapter " data-level="5.6.5" data-path="../receiving/reply.html">
<a href="../receiving/reply.html">
Replying to a Message
</a>
</li>
<li class="chapter " data-level="5.6.6" data-path="../receiving/wildcards.html">
<a href="../receiving/wildcards.html">
Wildcard Subscriptions
</a>
</li>
<li class="chapter " data-level="5.6.7" data-path="../receiving/queues.html">
<a href="../receiving/queues.html">
Queue Subscriptions
</a>
</li>
<li class="chapter " data-level="5.6.8" data-path="../receiving/drain.html">
<a href="../receiving/drain.html">
Draining Messages Before Disconnect
</a>
</li>
<li class="chapter " data-level="5.6.9" data-path="../receiving/structure.html">
<a href="../receiving/structure.html">
Structured Data
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.7" data-path="../sending/intro.html">
<a href="../sending/intro.html">
Sending Messages
</a>
<ul class="articles">
<li class="chapter " data-level="5.7.1" data-path="../sending/replyto.html">
<a href="../sending/replyto.html">
Including a Reply Subject
</a>
</li>
<li class="chapter " data-level="5.7.2" data-path="../sending/request_reply.html">
<a href="../sending/request_reply.html">
Request-Reply Semantics
</a>
</li>
<li class="chapter " data-level="5.7.3" data-path="../sending/caches.html">
<a href="../sending/caches.html">
Caches, Flush and Ping
</a>
</li>
<li class="chapter " data-level="5.7.4" data-path="../sending/structure.html">
<a href="../sending/structure.html">
Sending Structured Data
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.8" data-path="../events/intro.html">
<a href="../events/intro.html">
Monitoring the Connection
</a>
<ul class="articles">
<li class="chapter " data-level="5.8.1" data-path="../events/events.html">
<a href="../events/events.html">
Listen for Connection Events
</a>
</li>
<li class="chapter " data-level="5.8.2" data-path="../events/slow.html">
<a href="../events/slow.html">
Slow Consumers
</a>
</li>
</ul>
</li>
<li class="chapter " data-level="5.9" data-path="../tutorials/intro.html">
<a href="../tutorials/intro.html">
Tutorials
</a>
<ul class="articles">
<li class="chapter " data-level="5.9.1" data-path="../tutorials/pubsub.html">
<a href="../tutorials/pubsub.html">
Explore NATS Pub/Sub
</a>
</li>
<li class="chapter " data-level="5.9.2" data-path="../tutorials/reqreply.html">
<a href="../tutorials/reqreply.html">
Explore NATS Request/Reply
</a>
</li>
<li class="chapter " data-level="5.9.3" data-path="../tutorials/queues.html">
<a href="../tutorials/queues.html">
Explore NATS Queueing
</a>
</li>
<li class="chapter " data-level="5.9.4" data-path="../tutorials/custom_dialer.html">
<a href="../tutorials/custom_dialer.html">
Advanced Connect and Custom Dialer in Go
</a>
</li>
</ul>
</li>
<li class="header">Developing With NATS Streaming</li>
<li class="chapter " data-level="6.1" data-path="./">
<a href="./">
Introduction
</a>
</li>
<li class="chapter " data-level="6.2" data-path="connecting.html">
<a href="connecting.html">
Connecting to NATS Streaming
</a>
</li>
<li class="chapter " data-level="6.3" data-path="publishing.html">
<a href="publishing.html">
Publishing to a Channel
</a>
</li>
<li class="chapter " data-level="6.4" data-path="receiving.html">
<a href="receiving.html">
Receiving Messages from a Channel
</a>
</li>
<li class="chapter active" data-level="6.5" data-path="durables.html">
<a href="durables.html">
Durable Subscriptions
</a>
</li>
<li class="chapter " data-level="6.6" data-path="queues.html">
<a href="queues.html">
Queue Subscriptions
</a>
</li>
<li class="chapter " data-level="6.7" data-path="acks.html">
<a href="acks.html">
Acknowledgements
</a>
</li>
<li class="header">NATS Protocol</li>
<li class="chapter " data-level="7.1" data-path="../../nats_protocol/nats-protocol-demo.html">
<a href="../../nats_protocol/nats-protocol-demo.html">
Protocol Demo
</a>
</li>
<li class="chapter " data-level="7.2" data-path="../../nats_protocol/nats-protocol.html">
<a href="../../nats_protocol/nats-protocol.html">
Client Protocol
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<h1 id="durable-subscriptions">Durable Subscriptions</h1>
<p>Regular subscriptions remember their position while the client is connected. If the client disconnects the position is lost. Durable subscriptions remember their position even if the client is disconnected. Durable subscriptions identify themselves with a name. Connect and disconnect won&#x2019;t affect the durable subscriptions position in the channel. Unsubscribe will clear the durable subscription.</p>
<pre class="language-"><code class="lang-go">sc<span class="token punctuation">.</span><span class="token function">Subscribe</span><span class="token punctuation">(</span><span class="token string">&quot;foo&quot;</span><span class="token punctuation">,</span> <span class="token keyword">func</span><span class="token punctuation">(</span>m <span class="token operator">*</span>stan<span class="token punctuation">.</span>Msg<span class="token punctuation">)</span> <span class="token punctuation">{</span><span class="token operator">...</span><span class="token punctuation">}</span><span class="token punctuation">,</span> stan<span class="token punctuation">.</span><span class="token function">DurableName</span><span class="token punctuation">(</span><span class="token string">&quot;my-durable&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
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