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<h3 id="using-synctl-with-workers"><a class="header" href="#using-synctl-with-workers">Using synctl with workers</a></h3>
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<p>If you want to use <code>synctl</code> to manage your synapse processes, you will need to
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create an an additional configuration file for the main synapse process. That
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configuration should look like this:</p>
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<pre><code class="language-yaml">worker_app: synapse.app.homeserver
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</code></pre>
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<p>Additionally, each worker app must be configured with the name of a "pid file",
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to which it will write its process ID when it starts. For example, for a
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synchrotron, you might write:</p>
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<pre><code class="language-yaml">worker_pid_file: /home/matrix/synapse/worker1.pid
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</code></pre>
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<p>Finally, to actually run your worker-based synapse, you must pass synctl the <code>-a</code>
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commandline option to tell it to operate on all the worker configurations found
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in the given directory, e.g.:</p>
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<pre><code>synctl -a $CONFIG/workers start
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</code></pre>
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<p>Currently one should always restart all workers when restarting or upgrading
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synapse, unless you explicitly know it's safe not to. For instance, restarting
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synapse without restarting all the synchrotrons may result in broken typing
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notifications.</p>
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<p>To manipulate a specific worker, you pass the -w option to synctl:</p>
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<pre><code>synctl -w $CONFIG/workers/worker1.yaml restart
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</code></pre>
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