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authorreivilibre <reivilibre@users.noreply.github.com>2023-02-21 14:38:39 +0000
committerreivilibre <reivilibre@users.noreply.github.com>2023-02-21 14:38:39 +0000
commitf635f6df81509d0e4868d1503cbe90c12979e271 (patch)
treead464643b7995c6e4ffb63cc0ceac5d69fa4734a /v1.78/development/experimental_features.html
parentdeploy: 356ea4e09b706d81a7b12f4102d6be681620e283 (diff)
downloadsynapse-f635f6df81509d0e4868d1503cbe90c12979e271.tar.xz
deploy: a3d471e92938ad4cd2a7fc49e651791ba4d328d3
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+<!DOCTYPE HTML>
+<html lang="en" class="sidebar-visible no-js light">
+    <head>
+        <!-- Book generated using mdBook -->
+        <meta charset="UTF-8">
+        <title>Experimental features - Synapse</title>
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+
+        <nav id="sidebar" class="sidebar" aria-label="Table of contents">
+            <div class="sidebar-scrollbox">
+                <ol class="chapter"><li class="chapter-item expanded affix "><li class="part-title">Introduction</li><li class="chapter-item expanded "><a href="../welcome_and_overview.html">Welcome and Overview</a></li><li class="chapter-item expanded affix "><li class="part-title">Setup</li><li class="chapter-item expanded "><a href="../setup/installation.html">Installation</a></li><li class="chapter-item expanded "><a href="../postgres.html">Using Postgres</a></li><li class="chapter-item expanded "><a href="../reverse_proxy.html">Configuring a Reverse Proxy</a></li><li class="chapter-item expanded "><a href="../setup/forward_proxy.html">Configuring a Forward/Outbound Proxy</a></li><li class="chapter-item expanded "><a href="../turn-howto.html">Configuring a Turn Server</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../setup/turn/coturn.html">coturn TURN server</a></li><li class="chapter-item expanded "><a href="../setup/turn/eturnal.html">eturnal TURN 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+
+                        <h1 id="implementing-experimental-features-in-synapse"><a class="header" href="#implementing-experimental-features-in-synapse">Implementing experimental features in Synapse</a></h1>
+<p>It can be desirable to implement &quot;experimental&quot; features which are disabled by
+default and must be explicitly enabled via the Synapse configuration. This is
+applicable for features which:</p>
+<ul>
+<li>Are unstable in the Matrix spec (e.g. those defined by an MSC that has not yet been merged).</li>
+<li>Developers are not confident in their use by general Synapse administrators/users
+(e.g. a feature is incomplete, buggy, performs poorly, or needs further testing).</li>
+</ul>
+<p>Note that this only really applies to features which are expected to be desirable
+to a broad audience. The <a href="../modules/index.html">module infrastructure</a> should
+instead be investigated for non-standard features.</p>
+<p>Guarding experimental features behind configuration flags should help with some
+of the following scenarios:</p>
+<ul>
+<li>Ensure that clients do not assume that unstable features exist (failing
+gracefully if they do not).</li>
+<li>Unstable features do not become de-facto standards and can be removed
+aggressively (since only those who have opted-in will be affected).</li>
+<li>Ease finding the implementation of unstable features in Synapse (for future
+removal or stabilization).</li>
+<li>Ease testing a feature (or removal of feature) due to enabling/disabling without
+code changes. It also becomes possible to ask for wider testing, if desired.</li>
+</ul>
+<p>Experimental configuration flags should be disabled by default (requiring Synapse
+administrators to explicitly opt-in), although there are situations where it makes
+sense (from a product point-of-view) to enable features by default. This is
+expected and not an issue.</p>
+<p>It is not a requirement for experimental features to be behind a configuration flag,
+but one should be used if unsure.</p>
+<p>New experimental configuration flags should be added under the <code>experimental</code>
+configuration key (see the <code>synapse.config.experimental</code> file) and either explain
+(briefly) what is being enabled, or include the MSC number.</p>
+
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