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Site updated at 2017-03-18 17:12:07 UTC

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Multiple Instances
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<p>Home Assistant supports running multiple synchronised instances using a master-slave model. Whenever <code class="highlighter-rouge">events.fire</code> or <code class="highlighter-rouge">states.set</code> is called on the slave it will forward it to the master. The master will replicate all events and changed states to its slaves.</p>
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Overview of the Home Assistant architecture for multiple devices.
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<p>A slave instance can be started with the following code and has the same support for components as a master instance.</p>
<div class="language-python highlighter-rouge"><pre class="highlight"><code><span class="kn">import</span> <span class="nn">homeassistant.remote</span> <span class="kn">as</span> <span class="nn">remote</span>
<span class="kn">import</span> <span class="nn">homeassistant.bootstrap</span> <span class="kn">as</span> <span class="nn">bootstrap</span>
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<span class="n">hass</span><span class="o">.</span><span class="n">block_till_stopped</span><span class="p">()</span>
</code></pre>
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Because each slave maintains its own Service Registry it is possible to have multiple slaves respond to one service call.
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