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</a><div class="searchBox_ZlJk"><button type="button" class="DocSearch DocSearch-Button" aria-label="Search"><span class="DocSearch-Button-Container"><svg width="20" height="20" class="DocSearch-Search-Icon" viewBox="0 0 20 20" aria-hidden="true"><path d="M14.386 14.386l4.0877 4.0877-4.0877-4.0877c-2.9418 2.9419-7.7115 2.9419-10.6533 0-2.9419-2.9418-2.9419-7.7115 0-10.6533 2.9418-2.9419 7.7115-2.9419 10.6533 0 2.9419 2.9418 2.9419 7.7115 0 10.6533z" stroke="currentColor" fill="none" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round"></path></svg><span class="DocSearch-Button-Placeholder">Search</span></span><span class="DocSearch-Button-Keys"></span></button></div></div></div><div role="presentation" class="navbar-sidebar__backdrop"></div></nav><div id="__docusaurus_skipToContent_fallback" class="main-wrapper mainWrapper_z2l0 docsWrapper_BCFX"><button aria-label="Scroll back to top" class="clean-btn theme-back-to-top-button backToTopButton_sjWU" type="button"></button><div class="docPage__5DB"><main class="docMainContainer_gTbr docMainContainerEnhanced_Uz_u"><div class="container padding-top--md padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><span class="theme-doc-version-badge badge badge--secondary">Version: Next</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>What is GMA search index?</h1><p>Each <a href="/docs/what/search-document">search document</a> type (or <a href="/docs/what/entity">entity</a> type) will be mapped to an independent search index in Elasticsearch.
Beyond the standard search engine features (analyzer, tokenizer, filter queries, faceting, sharding, etc),
GMA also supports the following specific features:</p><ul><li>Partial update of indexed documents</li><li>Membership testing on multi-value fields</li><li>Zero downtime switch between indices</li></ul><p>Check out <a href="/docs/architecture/metadata-serving#search-dao">Search DAO</a> for search query abstraction in GMA.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="search-automation-tbd">Search Automation (TBD)<a href="#search-automation-tbd" class="hash-link" aria-label="Direct link to Search Automation (TBD)" title="Direct link to Search Automation (TBD)"></a></h2><p>We aim to automate the index creation, schema evolution, and reindexing such that the team will only need to focus on the search document model and their custom <a href="/docs/architecture/metadata-ingestion#search-index-builders">Index Builder</a> logic.
As the logic changes, a new version of the index will be created and populated from historic MAEs.
Once its fully populated, the team can switch to the new version through a simple config change from their <a href="/docs/what/gms">GMS</a>.
They can also rollback to an older version of index whenever needed.</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="slackUtm_uoBr"><div class="slackUtm_uoBr"><hr>Need more help? 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