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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Multi Tenancy · Apache Pulsar</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="generator" content="Docusaurus"/><meta name="description" content="Pulsar was created from the ground up as a multi-tenant system. To support multi-tenancy, Pulsar has a concept of tenants. Tenants can be spread across clusters and can each have their own [authentication and authorization](/docs/en/2.4.2/security-overview) scheme applied to them. They are also the administrative unit at which storage quotas, [message TTL](/docs/en/2.4.2/cookbooks-retention-expiry#time-to-live-ttl), and isolation policies can be managed."/><meta name="docsearch:version" content="2.4.2"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Multi Tenancy · Apache Pulsar"/><meta property="og:type" content="website"/><meta property="og:url" content="https://pulsar.apache.org/"/><meta property="og:description" content="Pulsar was created from the ground up as a multi-tenant system. To support multi-tenancy, Pulsar has a concept of tenants. Tenants can be spread across clusters and can each have their own [authentication and authorization](/docs/en/2.4.2/security-overview) scheme applied to them. They are also the administrative unit at which storage quotas, [message TTL](/docs/en/2.4.2/cookbooks-retention-expiry#time-to-live-ttl), and isolation policies can be managed."/><meta name="twitter:card" content="summary"/><meta name="twitter:image" content="https://pulsar.apache.org/img/pulsar.svg"/><link rel="shortcut icon" href="/img/pulsar.ico"/><link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/highlight.js/9.12.0/styles/atom-one-dark.min.css"/><link rel="alternate" type="application/atom+xml" href="https://pulsar.apache.org/blog/atom.xml" title="Apache Pulsar Blog ATOM Feed"/><link rel="alternate" type="application/rss+xml" href="https://pulsar.apache.org/blog/feed.xml" title="Apache Pulsar Blog RSS Feed"/><link rel="stylesheet" href="/css/code-blocks-buttons.css"/><script type="text/javascript" src="https://buttons.github.io/buttons.js"></script><script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/clipboard.js/2.0.0/clipboard.min.js"></script><script type="text/javascript" src="/js/custom.js"></script><script src="/js/scrollSpy.js"></script><link rel="stylesheet" href="/css/main.css"/><script src="/js/codetabs.js"></script></head><body class="sideNavVisible separateOnPageNav"><div class="fixedHeaderContainer"><div class="headerWrapper wrapper"><header><a href="/en"><img class="logo" src="/img/pulsar.svg" alt="Apache Pulsar"/></a><a href="/en/versions"><h3>2.4.2</h3></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class="siteNavGroupActive"><a href="/docs/en/2.4.2/getting-started-standalone" target="_self">Docs</a></li><li class=""><a href="/en/download" target="_self">Download</a></li><li class="siteNavGroupActive"><a href="/docs/en/2.4.2/client-libraries" target="_self">Clients</a></li><li class=""><a href="#restapis" target="_self">REST APIs</a></li><li class=""><a href="#cli" target="_self">Cli</a></li><li class=""><a href="/blog/" target="_self">Blog</a></li><li class=""><a href="#community" target="_self">Community</a></li><li class=""><a href="#apache" target="_self">Apache</a></li><li class=""><a href="https://pulsar-next.staged.apache.org/" target="_self">New Website (Beta)</a></li><span><li><a id="languages-menu" href="#"><img class="languages-icon" src="/img/language.svg" alt="Languages icon"/>English</a><div id="languages-dropdown" class="hide"><ul id="languages-dropdown-items"><li><a href="/docs/ja/2.4.2/concepts-multi-tenancy">日本語</a></li><li><a href="/docs/fr/2.4.2/concepts-multi-tenancy">Français</a></li><li><a href="/docs/ko/2.4.2/concepts-multi-tenancy">한국어</a></li><li><a href="/docs/zh-CN/2.4.2/concepts-multi-tenancy">中文</a></li><li><a href="/docs/zh-TW/2.4.2/concepts-multi-tenancy">繁體中文</a></li><li><a href="https://crowdin.com/project/apache-pulsar" target="_blank" rel="noreferrer noopener">Help Translate</a></li></ul></div></li><script>
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</script></nav></div><div class="container mainContainer docsContainer"><div class="wrapper"><div class="post"><header class="postHeader"><a class="edit-page-link button" href="https://github.com/apache/pulsar/edit/master/site2/docs/concepts-multi-tenancy.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 id="__docusaurus" class="postHeaderTitle">Multi Tenancy</h1></header><article><div><span><p>Pulsar was created from the ground up as a multi-tenant system. To support multi-tenancy, Pulsar has a concept of tenants. Tenants can be spread across clusters and can each have their own <a href="/docs/en/2.4.2/security-overview">authentication and authorization</a> scheme applied to them. They are also the administrative unit at which storage quotas, <a href="/docs/en/2.4.2/cookbooks-retention-expiry#time-to-live-ttl">message TTL</a>, and isolation policies can be managed.</p>
<p>The multi-tenant nature of Pulsar is reflected mostly visibly in topic URLs, which have this structure:</p>
<pre><code class="hljs css language-http">persistent://tenant/namespace/topic
</code></pre>
<p>As you can see, the tenant is the most basic unit of categorization for topics (more fundamental than the namespace and topic name).</p>
<h2><a class="anchor" aria-hidden="true" id="tenants"></a><a href="#tenants" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Tenants</h2>
<p>To each tenant in a Pulsar instance you can assign:</p>
<ul>
<li>An <a href="/docs/en/2.4.2/security-authorization">authorization</a> scheme</li>
<li>The set of <a href="/docs/en/2.4.2/reference-terminology#cluster">clusters</a> to which the tenant's configuration applies</li>
</ul>
<h2><a class="anchor" aria-hidden="true" id="namespaces"></a><a href="#namespaces" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Namespaces</h2>
<p>Tenants and namespaces are two key concepts of Pulsar to support multi-tenancy.</p>
<ul>
<li>Pulsar is provisioned for specified tenants with appropriate capacity allocated to the tenant.</li>
<li>A namespace is the administrative unit nomenclature within a tenant. The configuration policies set on a namespace apply to all the topics created in that namespace. A tenant may create multiple namespaces via self-administration using the REST API and the <a href="/docs/en/2.4.2/reference-pulsar-admin"><code>pulsar-admin</code></a> CLI tool. For instance, a tenant with different applications can create a separate namespace for each application.</li>
</ul>
<p>Names for topics in the same namespace will look like this:</p>
<pre><code class="hljs css language-http">persistent://tenant/app1/topic-1
persistent://tenant/app1/topic-2
persistent://tenant/app1/topic-3
</code></pre>
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