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Manual:$wgWANObjectCaches - MediaWiki

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<div id="siteSub" class="noprint">From mediawiki.org</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-pt-translate-header noprint nomobile" dir="ltr" lang="en"><a href="/w/index.php?title=Special:Translate&amp;group=page-Manual%3A%24wgWANObjectCaches&amp;action=page&amp;filter=&amp;action_source=translate_page" title="Special:Translate">Translate this page</a></div><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="mw-pt-languages noprint navigation-not-searchable" lang="en" dir="ltr"><div class="mw-pt-languages-label">Languages:</div><ul class="mw-pt-languages-list"><li><a href="/wiki/Manual:$wgWANObjectCaches/de" class="mw-pt-progress mw-pt-progress--med" title="Handbuch:$wgWANObjectCaches (47% translated)" lang="de" dir="ltr">Deutsch</a></li> <li><span class="mw-pt-languages-ui mw-pt-languages-selected mw-pt-progress mw-pt-progress--complete" lang="en" 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class="mw-pt-progress mw-pt-progress--med" title="Manual:$wgWANObjectCaches (33% translated)" lang="ja" dir="ltr">日本語</a></li></ul></div><style data-mw-deduplicate="TemplateStyles:r6651108">.mw-parser-output table.ombox{margin:4px 10%;border-collapse:collapse;border:1px solid #a2a9b1;background-color:#f8f9fa;color:#333;box-sizing:border-box}.mw-parser-output .ombox td.mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ombox th.mbox-text,.mw-parser-output .ombox td.mbox-text{border:none;padding:0.25em 0.9em;width:100%}.mw-parser-output .ombox td.mbox-image{border:none;text-align:center;padding:2px 0 2px 0.9em}.mw-parser-output .ombox td.mbox-imageright{border:none;text-align:center;padding:2px 0.9em 2px 0}.mw-parser-output table.ombox-notice{border-color:#a2a9b1}.mw-parser-output table.ombox-speedy{background-color:#fee7e6;color:#333}.mw-parser-output table.ombox-speedy,.mw-parser-output table.ombox-delete{border-color:#b32424;border-width:2px}.mw-parser-output table.ombox-content{border-color:#f28500}.mw-parser-output table.ombox-style{border-color:#fc3}.mw-parser-output table.ombox-move{border-color:#9932cc}.mw-parser-output table.ombox-protection{border-color:#a2a9b1;border-width:2px}html body.mediawiki .mw-parser-output .ombox.mbox-small{clear:right;float:right;margin:4px 0 4px 1em;box-sizing:border-box;width:238px;font-size:88%;line-height:1.25em}@media screen{html.skin-theme-clientpref-night .mw-parser-output table.ombox{background-color:transparent;color:inherit}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output table.ombox{background-color:transparent;color:inherit}}</style><table class="ombox-delete ombox plainlinks" role="presentation"><tbody><tr><td class="mbox-image"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f6/OOjs_UI_icon_alert-destructive.svg/40px-OOjs_UI_icon_alert-destructive.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f6/OOjs_UI_icon_alert-destructive.svg/60px-OOjs_UI_icon_alert-destructive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f6/OOjs_UI_icon_alert-destructive.svg/80px-OOjs_UI_icon_alert-destructive.svg.png 2x" data-file-width="20" data-file-height="20" /></span></span></td><td class="mbox-text">This feature was removed from MediaWiki core in version 1.40.0. <i>Please see <b><a href="/wiki/Manual:$wgWANObjectCache" title="Manual:$wgWANObjectCache">$wgWANObjectCache</a></b> for an alternative way to use this feature.</i></td></tr></tbody></table> <style data-mw-deduplicate="TemplateStyles:r6815794">.mw-parser-output .settingsummary{margin:1em auto;text-align:left;background:var(--background-color-base,#fff);color:var(--color-base,#202122);border:1px solid var(--border-color-base,#a2a9b1);border-collapse:collapse}.mw-parser-output .settingsummary th,.mw-parser-output .settingsummary td{padding:5px}.mw-parser-output .settingsummary-header{padding:.5em;text-align:center;background-color:var(--background-color-neutral,#eaecf0)}.mw-parser-output .settingsummary-summary{text-align:center}.mw-parser-output .settingsummary th[scope="row"]{padding:0.3em;text-align:left}.mw-parser-output .settingsummary-default th{vertical-align:top}.mw-parser-output .settingsummary-footer{text-align:center;margin:0.3em;font-size:small;font-style:italic}@media screen{html.skin-theme-clientpref-night .mw-parser-output .settingsummary-header{border-bottom:solid 1px var(--border-color-base,#a2a9b1)}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .settingsummary-header{border-bottom:solid 1px var(--border-color-base,#a2a9b1)}}</style> <table class="settingsummary"> <tbody><tr> <th class="settingsummary-header" colspan="2"><a href="/wiki/Special:MyLanguage/Manual:Configuration_settings#Cache" title="Special:MyLanguage/Manual:Configuration settings">Cache</a>: $wgWANObjectCaches</th> </tr><tr> <td class="settingsummary-summary" colspan="2">Advanced Wide-Area-Network cache configuration.<br /></td> </tr><tr> <th scope="row">Introduced in version:</th><td><a href="/wiki/Category:MediaWiki_configuration_settings_introduced_in_version_1.26.0" title="Category:MediaWiki configuration settings introduced in version 1.26.0">1.26.0</a> (<a href="https://gerrit.wikimedia.org/r/187074" class="extiw" title="gerrit:187074">Gerrit change 187074</a>;&#32;<a href="https://gerrit.wikimedia.org/r/q/3a1f8b111132f5b21d60e9c83ca2cd7d0bb79bd0" class="extiw" title="gerrit:q/3a1f8b111132f5b21d60e9c83ca2cd7d0bb79bd0">git #3a1f8b11</a>)</td> </tr> <tr> <th scope="row">Removed in version:</th><td><a href="/wiki/Category:MediaWiki_configuration_settings_removed_in_version_1.40.0" title="Category:MediaWiki configuration settings removed in version 1.40.0">1.40.0</a> (<a href="https://gerrit.wikimedia.org/r/889244" class="extiw" title="gerrit:889244">Gerrit change 889244</a>;&#32;<a href="https://gerrit.wikimedia.org/r/q/39ead04e984c" class="extiw" title="gerrit:q/39ead04e984c">git #39ead04e</a>)</td> </tr><tr> <th scope="row">Allowed values:</th><td>(array)</td> </tr><tr class="settingsummary-default"> <th scope="row">Default value:</th><td><i>see below</i></td> </tr><tr> <td class="settingsummary-footer" colspan="2">Other settings: <a href="/wiki/Special:MyLanguage/Manual:Configuration_settings_(alphabetical)" title="Special:MyLanguage/Manual:Configuration settings (alphabetical)">Alphabetical</a> | <a href="/wiki/Special:MyLanguage/Manual:Configuration_settings" title="Special:MyLanguage/Manual:Configuration settings">By function</a></td> </tr> </tbody></table> <div class="mw-heading mw-heading2"><h2 id="Details">Details</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Manual:$wgWANObjectCaches&amp;action=edit&amp;section=1" title="Edit section: Details"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Each WAN cache wraps a registered object cache (for the local cluster) and it must also be configured to point to a PubSub instance via a EventRelayer subclass. Subscribers to that instance must be configured to relay purges to the actual cache servers. For typical setups where there is only one cache server, a no-op PubSub instance can be used (EventRelayerNull). This can also be done if there is only one datacenter, assuming either (a) cache network problems are rare enough, or (b) client side cache server fail-over is disabled, or (c) the caching store automatically shards, replicates, and moves data around as nodes fail. </p><p>The format is an associative array where the key is a cache identifier, and the value is an associative array of parameters. </p> <ul><li><code>cacheId</code> - a cache identifier from <code>$wgObjectCaches</code>.</li> <li><code>relayerConfig</code> - an array used to construct an EventRelayer object.</li> <li><code>pool</code> - a string that is used as a PubSub channel prefix.</li> <li><code>loggroup</code> - controls where log events are sent.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Default_value">Default value</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Manual:$wgWANObjectCaches&amp;action=edit&amp;section=2" title="Edit section: Default value"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r4199130">.mw-parser-output .mw-version{border:1px solid #72777d;font-size:80%;line-height:1.2;border-collapse:collapse}.mw-parser-output .mw-version-ltr{float:right;margin:0 0 .5em .5em;text-align:right}.mw-parser-output .mw-version-rtl{float:left;margin:0 .5em .5em 0;text-align:left}.mw-parser-output .mw-version td{padding:.1em .3em}.mw-parser-output .mw-version-versionbox{border:5px solid #00af89;text-align:center}.mw-parser-output .mw-version-versionnumber{font-weight:bold;font-size:180%}.mw-parser-output .mw-version-version .mw-version-versionbox{border-color:#c8ccd1}.mw-parser-output .mw-version.mw-version-version2 .mw-version-versionbox{border-top-color:#c8ccd1;border-right-color:#c8ccd1;border-left-color:#c8ccd1}.mw-parser-output .mw-version-version-unsupported .mw-version-versionbox{border-color:#d33}.mw-parser-output .mw-version.mw-version-version2-unsupported .mw-version-versionbox{border-top-color:#d33;border-right-color:#d33;border-left-color:#d33}.mw-parser-output .mw-version-version-legacy .mw-version-versionbox{border-color:#f93}.mw-parser-output .mw-version.mw-version-version2-legacy .mw-version-versionbox{border-top-color:#f93;border-right-color:#f93;border-left-color:#f93}.mw-parser-output .mw-version-version-stable .mw-version-versionbox,.mw-parser-output .mw-version.mw-version.mw-version-and-later .mw-version-versionbox{border-color:#00af89}.mw-parser-output .mw-version.mw-version-version2-stable .mw-version-versionbox{border-top-color:#00af89;border-right-color:#00af89;border-left-color:#00af89}.mw-parser-output .mw-version-version-future .mw-version-versionbox{border-color:#8080c0}.mw-parser-output .mw-version.mw-version-version2-future .mw-version-versionbox{border-top-color:#8080c0;border-right-color:#8080c0;border-left-color:#8080c0}.mw-parser-output .mw-version-version-alpha .mw-version-versionbox{border-style:dotted}</style> <table class="mw-version mw-version-ltr mw-version-version mw-version-version-unsupported mw-version-and-later"><tbody><tr> <td>MediaWiki version:</td> <td class="mw-version-versionbox" title="The latest stable version is 1.42"><div class="mw-version-versionnumber"><small>&#8805;</small> 1.35</div></td> </tr></tbody></table><div style="clear: both;"></div> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="nv">$wgWANObjectCaches</span> <span class="o">=</span> <span class="p">[</span> <span class="nx">CACHE_NONE</span> <span class="o">=&gt;</span> <span class="p">[</span> <span class="s1">&#39;class&#39;</span> <span class="o">=&gt;</span> <span class="nx">WANObjectCache</span><span class="o">::</span><span class="na">class</span><span class="p">,</span> <span class="s1">&#39;cacheId&#39;</span> <span class="o">=&gt;</span> <span class="nx">CACHE_NONE</span><span class="p">,</span> <span class="p">]</span> <span class="p">];</span> </pre></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r4199130"> <table class="mw-version mw-version-ltr mw-version-version mw-version-version-unsupported mw-version-version2 mw-version-version2-unsupported"><tbody><tr> <td>MediaWiki versions:</td> <td class="mw-version-versionbox" title="MediaWiki 1.34 is an unsupported version"><div class="mw-version-versionnumber"> 1.33&#32;&#8211; 1.34</div></td> </tr></tbody></table><div style="clear: both;"></div> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="nv">$wgWANObjectCaches</span> <span class="o">=</span> <span class="p">[</span> <span class="nx">CACHE_NONE</span> <span class="o">=&gt;</span> <span class="p">[</span> <span class="s1">&#39;class&#39;</span> <span class="o">=&gt;</span> <span class="nx">WANObjectCache</span><span class="o">::</span><span class="na">class</span><span class="p">,</span> <span class="s1">&#39;cacheId&#39;</span> <span class="o">=&gt;</span> <span class="nx">CACHE_NONE</span> <span class="p">]</span> <span class="cm">/* Example of a simple single data-center cache:</span> <span class="cm"> &#39;memcached-php&#39; =&gt; [</span> <span class="cm"> &#39;class&#39; =&gt; WANObjectCache::class,</span> <span class="cm"> &#39;cacheId&#39; =&gt; &#39;memcached-php&#39;</span> <span class="cm"> ]</span> <span class="cm"> */</span> <span class="p">];</span> </pre></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r4199130"> <table class="mw-version mw-version-ltr mw-version-version mw-version-version-unsupported mw-version-version2 mw-version-version2-unsupported"><tbody><tr> <td>MediaWiki versions:</td> <td class="mw-version-versionbox" title="MediaWiki 1.32 is an unsupported version"><div class="mw-version-versionnumber"> 1.31&#32;&#8211; 1.32</div></td> </tr></tbody></table><div style="clear: both;"></div> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="nv">$wgWANObjectCaches</span> <span class="o">=</span> <span class="p">[</span> <span class="nx">CACHE_NONE</span> <span class="o">=&gt;</span> <span class="p">[</span> <span class="s1">&#39;class&#39;</span> <span class="o">=&gt;</span> <span class="nx">WANObjectCache</span><span class="o">::</span><span class="na">class</span><span class="p">,</span> <span class="s1">&#39;cacheId&#39;</span> <span class="o">=&gt;</span> <span class="nx">CACHE_NONE</span><span class="p">,</span> <span class="s1">&#39;channels&#39;</span> <span class="o">=&gt;</span> <span class="p">[]</span> <span class="p">]</span> <span class="cm">/* Example of a simple single data-center cache:</span> <span class="cm"> &#39;memcached-php&#39; =&gt; [</span> <span class="cm"> &#39;class&#39; =&gt; WANObjectCache::class,</span> <span class="cm"> &#39;cacheId&#39; =&gt; &#39;memcached-php&#39;,</span> <span class="cm"> &#39;channels&#39; =&gt; [ &#39;purge&#39; =&gt; &#39;wancache-main-memcached-purge&#39; ]</span> <span class="cm"> ]</span> <span class="cm"> */</span> <span class="p">];</span> </pre></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r4199130"> <table class="mw-version mw-version-ltr mw-version-version mw-version-version-unsupported mw-version-version2 mw-version-version2-unsupported"><tbody><tr> <td>MediaWiki versions:</td> <td class="mw-version-versionbox" title="MediaWiki 1.30 is an unsupported version"><div class="mw-version-versionnumber"> 1.27&#32;&#8211; 1.30</div></td> </tr></tbody></table><div style="clear: both;"></div> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="nv">$wgWANObjectCaches</span> <span class="o">=</span> <span class="p">[</span> <span class="nx">CACHE_NONE</span> <span class="o">=&gt;</span> <span class="p">[</span> <span class="s1">&#39;class&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;WANObjectCache&#39;</span><span class="p">,</span> <span class="s1">&#39;cacheId&#39;</span> <span class="o">=&gt;</span> <span class="nx">CACHE_NONE</span><span class="p">,</span> <span class="s1">&#39;channels&#39;</span> <span class="o">=&gt;</span> <span class="p">[]</span> <span class="p">]</span> <span class="cm">/* Example of a simple single data-center cache:</span> <span class="cm"> &#39;memcached-php&#39; =&gt; [</span> <span class="cm"> &#39;class&#39; =&gt; &#39;WANObjectCache&#39;,</span> <span class="cm"> &#39;cacheId&#39; =&gt; &#39;memcached-php&#39;,</span> <span class="cm"> &#39;channels&#39; =&gt; [ &#39;purge&#39; =&gt; &#39;wancache-main-memcached-purge&#39; ]</span> <span class="cm"> ]</span> <span class="cm"> */</span> <span class="p">];</span> </pre></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r4199130"> <table class="mw-version mw-version-ltr mw-version-version mw-version-version-unsupported"><tbody><tr> <td>MediaWiki version:</td> <td class="mw-version-versionbox" title="MediaWiki 1.26 is an unsupported version"><div class="mw-version-versionnumber"> 1.26</div></td> </tr></tbody></table><div style="clear: both;"></div> <div class="mw-highlight mw-highlight-lang-php mw-content-ltr" dir="ltr"><pre><span></span><span class="nv">$wgWANObjectCaches</span> <span class="o">=</span> <span class="k">array</span><span class="p">(</span> <span class="nx">CACHE_NONE</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span> <span class="s1">&#39;class&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;WANObjectCache&#39;</span><span class="p">,</span> <span class="s1">&#39;cacheId&#39;</span> <span class="o">=&gt;</span> <span class="nx">CACHE_NONE</span><span class="p">,</span> <span class="s1">&#39;pool&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;mediawiki-main-none&#39;</span><span class="p">,</span> <span class="s1">&#39;relayerConfig&#39;</span> <span class="o">=&gt;</span> <span class="k">array</span><span class="p">(</span> <span class="s1">&#39;class&#39;</span> <span class="o">=&gt;</span> <span class="s1">&#39;EventRelayerNull&#39;</span> <span class="p">)</span> <span class="p">)</span> <span class="cm">/* Example of a simple single data-center cache:</span> <span class="cm"> &#39;memcached-php&#39; =&gt; array(</span> <span class="cm"> &#39;class&#39; =&gt; &#39;WANObjectCache&#39;,</span> <span class="cm"> &#39;cacheId&#39; =&gt; &#39;memcached-php&#39;,</span> <span class="cm"> &#39;pool&#39; =&gt; &#39;mediawiki-main-memcached&#39;,</span> <span class="cm"> &#39;relayerConfig&#39; =&gt; array( &#39;class&#39; =&gt; &#39;EventRelayerNull&#39; )</span> <span class="cm"> )</span> <span class="cm"> */</span> <span class="p">);</span> </pre></div> <!-- NewPP limit report Parsed by mw‐web.eqiad.main‐67876799fc‐hw4px Cached time: 20241127174434 Cache expiry: 2592000 Reduced expiry: false Complications: [] CPU time usage: 0.265 seconds Real time usage: 0.809 seconds Preprocessor visited node count: 2316/1000000 Post‐expand include size: 12185/2097152 bytes Template argument size: 1557/2097152 bytes Highest expansion depth: 14/100 Expensive parser function count: 7/500 Unstrip recursion depth: 0/20 Unstrip post‐expand size: 20129/5000000 bytes Lua time usage: 0.031/10.000 seconds Lua memory usage: 1230267/52428800 bytes Number of Wikibase entities loaded: 0/400 --> <!-- Transclusion expansion time report (%,ms,calls,template) 100.00% 494.343 1 -total 21.51% 106.323 1 Template:SettingSummary 10.19% 50.372 1 Template:Removed 10.12% 50.003 4 Template:MW_version 9.26% 45.768 1 Template:Mbox 9.13% 45.146 5 Template:MW_version/layout 7.46% 36.855 1 Template:MW_1.35 3.07% 15.152 2 Template:Git 2.99% 14.800 1 Template:MW_1.26 2.27% 11.223 17 Template:MW_version/status --> <!-- Saved in parser cache with key mediawikiwiki:pcache:idhash:517649-0!canonical and timestamp 20241127174434 and revision id 5836682. 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