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<title data-rh="true">Overview | DataHub</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://docs.datahub.com/docs/architecture/architecture"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-default-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-default-current"><meta data-rh="true" property="og:title" content="Overview | DataHub"><meta data-rh="true" name="description" content="DataHub is a 3rd generation data catalog that enables Data Discovery, Collaboration, Governance, and end-to-end Observability"><meta data-rh="true" property="og:description" content="DataHub is a 3rd generation data catalog that enables Data Discovery, Collaboration, Governance, and end-to-end Observability"><link data-rh="true" rel="icon" href="/img/favicon.ico"><link data-rh="true" rel="canonical" href="https://docs.datahub.com/docs/architecture/architecture"><link data-rh="true" rel="alternate" href="https://docs.datahub.com/docs/architecture/architecture" hreflang="en"><link data-rh="true" rel="alternate" href="https://docs.datahub.com/docs/architecture/architecture" hreflang="x-default"><link data-rh="true" rel="preconnect" href="https://RK0UG797F3-dsn.algolia.net" crossorigin="anonymous"><link rel="alternate" type="application/rss+xml" href="/learn/rss.xml" title="DataHub RSS Feed">
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<div role="region" aria-label="Skip to main content"><a class="skipToContent_fXgn" href="#__docusaurus_skipToContent_fallback">Skip to main content</a></div><div class="announcementBar_mb4j" style="background-color:transparent;color:#ffffff" role="banner"><div class="content_knG7 announcementBarContent_xLdY"><div class="shimmer-banner"><p>DataHub Secures $35 Million Series B</p><a href="https://datahub.com/news/series-b-announcement/" target="_blank" class="button"><div>Read the announcement<span> →</span></div></a></div></div></div><nav aria-label="Main" class="navbar navbar--fixed-top"><div class="navbar__inner"><div class="navbar__items"><button aria-label="Toggle navigation bar" aria-expanded="false" class="navbar__toggle clean-btn" type="button"><svg width="30" height="30" viewBox="0 0 30 30" aria-hidden="true"><path stroke="currentColor" stroke-linecap="round" stroke-miterlimit="10" stroke-width="2" d="M4 7h22M4 15h22M4 23h22"></path></svg></button><a href="https://datahub.com" target="_blank" rel="noopener noreferrer" class="navbar__brand"><div class="navbar__logo"><img src="/img/datahub-logo-color-light-horizontal.svg" alt="DataHub Logo" class="themedImage_ToTc themedImage--light_HNdA"><img src="/img/datahub-logo-color-dark-horizontal.svg" alt="DataHub Logo" class="themedImage_ToTc themedImage--dark_i4oU"></div></a><div class="navbar__item dropdown dropdown--hoverable"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link versionNavItem_cbn8">Next</a><ul class="dropdown__menu"><li><a aria-current="page" class="dropdown__link dropdown__link--active" href="/docs/architecture/architecture">Next</a></li><li><a class="dropdown__link" href="/docs/1.1.0/architecture/architecture">1.1.0</a></li><li><hr class="dropdown-separator" style="margin: 0.4rem;"></li><li><div class="dropdown__link"><b>Archived versions</b></div></li><li>
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</li></ul></div></div><div class="navbar__items navbar__items--right"><a aria-current="page" class="navbar__item navbar__link navbar__link--active" href="/docs">Docs</a><a class="navbar__item navbar__link" href="/integrations">Integrations</a><div class="navbar__item dropdown dropdown--hoverable"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link">Learn</a><ul class="dropdown__menu dropdown__menu_Z8FC"><div class="wrapper_kp81"><div><a href="https://datahub.com/weekly-demo" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-join-slack.png" alt="Weekly Demo"></div><div class="title_c7DP">Weekly Demo</div></a></div><div><a href="https://datahub.com/use-cases" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-forum.png" alt="Use Cases"></div><div class="title_c7DP">Use Cases</div></a></div><div><a href="httpps://datahub.com/adoption-stories" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-events.png" alt="Adoption Stories"></div><div class="title_c7DP">Adoption Stories</div></a></div><div><a href="https://medium.com/datahub-project" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-champions.png" alt="Blog"></div><div class="title_c7DP">Blog</div></a></div><div><a href="https://www.youtube.com/channel/UC3qFQC5IiwR5fvWEqi_tJ5w" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-share-your-journey.png" alt="Youtube"></div><div class="title_c7DP">Youtube</div></a></div></div></ul></div><div class="navbar__item dropdown dropdown--hoverable"><a href="#" aria-haspopup="true" aria-expanded="false" role="button" class="navbar__link">Community</a><ul class="dropdown__menu dropdown__menu_Z8FC"><div class="wrapper_kp81"><div><a href="https://datahub.com/slack/" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-join-slack.png" alt="Join Slack"></div><div class="title_c7DP">Join Slack</div></a></div><div><a href="https://datahub.com/events" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-events.png" alt="Events"></div><div class="title_c7DP">Events</div></a></div><div><a href="https://datahub.com/champions/" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-champions.png" alt="Champions"></div><div class="title_c7DP">Champions</div></a></div><div><a href="https://datahub.com/share-your-journey/" target="_blank" rel="noopener noreferrer" class="card_BUD7"><div class="icon_BgHd"><img src="/img/icon-share-your-journey.png" alt="Share Your Journey"></div><div class="title_c7DP">Share Your Journey</div></a></div></div></ul></div><a href="https://datahub.com/products/why-datahub-cloud/" target="_blank" rel="noopener noreferrer" class="navbar__item navbar__link">
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background: linear-gradient(40deg, var(--ifm-menu-color-active), var(--ifm-menu-color-active));
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color: transparent;
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-webkit-background-clip: text;
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background-clip: text;
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animation: gradientShift 3s ease infinite;
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0%, 100% { background-position: 0% 50%; }
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href="/docs/managed-datahub/upgrade_core_to_cloud">Upgrading from DataHub Core to Cloud</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/authentication/guides/sso/initialize-oidc">Configure Single Sign-On</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="/docs/managed-datahub/remote-executor/about">Remote Executor</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist 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padding-bottom--lg"><div class="row"><div class="col docItemCol_VOVn"><div class="docItemContainer_Djhp"><article><nav class="theme-doc-breadcrumbs breadcrumbsContainer_Z_bl" aria-label="Breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a aria-label="Home page" class="breadcrumbs__link" href="/"><svg viewBox="0 0 24 24" class="breadcrumbHomeIcon_YNFT"><path d="M10 19v-5h4v5c0 .55.45 1 1 1h3c.55 0 1-.45 1-1v-7h1.7c.46 0 .68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">Architecture</span><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Overview</span><meta itemprop="position" content="2"></li></ul></nav><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>DataHub Architecture Overview</h1><p>DataHub is a <a href="https://engineering.linkedin.com/blog/2020/datahub-popular-metadata-architectures-explained" target="_blank" rel="noopener noreferrer">3rd generation</a> data catalog that enables Data Discovery, Collaboration, Governance, and end-to-end Observability
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that is built for the Modern Data Stack. DataHub employs a model-first philosophy, with a focus on unlocking interoperability between
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disparate tools & systems.</p><p>The figures below describe the high-level architecture of DataHub.</p><p align="center"><img loading="lazy" width="70%" src="https://raw.githubusercontent.com/datahub-project/static-assets/main/imgs/datahub-architecture.png" class="img_ev3q"></p><p align="center"><img loading="lazy" width="70%" src="https://raw.githubusercontent.com/datahub-project/static-assets/main/imgs/saas/DataHub-Architecture.png" class="img_ev3q"></p><p>For a more detailed look at the components that make up the Architecture, check out <a href="/docs/components">Components</a>.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="architecture-highlights">Architecture Highlights<a href="#architecture-highlights" class="hash-link" aria-label="Direct link to Architecture Highlights" title="Direct link to Architecture Highlights"></a></h2><p>There are three main highlights of DataHub's architecture.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="schema-first-approach-to-metadata-modeling">Schema-first approach to Metadata Modeling<a href="#schema-first-approach-to-metadata-modeling" class="hash-link" aria-label="Direct link to Schema-first approach to Metadata Modeling" title="Direct link to Schema-first approach to Metadata Modeling"></a></h3><p>DataHub's metadata model is described using a <a href="https://linkedin.github.io/rest.li/pdl_schema" target="_blank" rel="noopener noreferrer">serialization agnostic language</a>. Both <a href="https://github.com/datahub-project/datahub/blob/master/metadata-service" target="_blank" rel="noopener noreferrer">REST</a> as well as <a href="https://github.com/datahub-project/datahub/blob/master/datahub-web-react/src/graphql" target="_blank" rel="noopener noreferrer">GraphQL API-s</a> are supported. In addition, DataHub supports an <a href="https://github.com/datahub-project/datahub/blob/master/metadata-events" target="_blank" rel="noopener noreferrer">AVRO-based API</a> over Kafka to communicate metadata changes and subscribe to them. Our <a href="/docs/roadmap">roadmap</a> includes a milestone to support no-code metadata model edits very soon, which will allow for even more ease of use, while retaining all the benefits of a typed API. Read about metadata modeling at <a href="/docs/metadata-modeling/metadata-model">metadata modeling</a>.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="stream-based-real-time-metadata-management-platform">Stream-based Real-time Metadata Management Platform<a href="#stream-based-real-time-metadata-management-platform" class="hash-link" aria-label="Direct link to Stream-based Real-time Metadata Management Platform" title="Direct link to Stream-based Real-time Metadata Management Platform"></a></h3><p>DataHub's metadata infrastructure is stream-oriented, which allows for changes in metadata to be communicated and reflected within the platform within seconds. You can also subscribe to changes happening in DataHub's metadata, allowing you to build real-time metadata-driven systems. For example, you can build an access-control system that can observe a previously world-readable dataset adding a new schema field which contains PII, and locks down that dataset for access control reviews.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="federated-metadata-serving">Federated Metadata Serving<a href="#federated-metadata-serving" class="hash-link" aria-label="Direct link to Federated Metadata Serving" title="Direct link to Federated Metadata Serving"></a></h3><p>DataHub comes with a single <a href="https://github.com/datahub-project/datahub/blob/master/metadata-service" target="_blank" rel="noopener noreferrer">metadata service (gms)</a> as part of the open source repository. However, it also supports federated metadata services which can be owned and operated by different teams –– in fact, that is how LinkedIn runs DataHub internally. The federated services communicate with the central search index and graph using Kafka, to support global search and discovery while still enabling decoupled ownership of metadata. This kind of architecture is very amenable for companies who are implementing <a href="https://martinfowler.com/articles/data-monolith-to-mesh.html" target="_blank" rel="noopener noreferrer">data mesh</a>.</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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