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<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Use Azure BlobStore offloader with Pulsar · Apache Pulsar</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="generator" content="Docusaurus"/><meta name="description" content="This chapter guides you through every step of installing and configuring the Azure BlobStore offloader and using it with Pulsar."/><meta name="docsearch:version" content="2.8.3"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Use Azure BlobStore offloader with Pulsar · Apache Pulsar"/><meta property="og:type" content="website"/><meta property="og:url" content="https://pulsar.apache.org/"/><meta property="og:description" content="This chapter guides you through every step of installing and configuring the Azure BlobStore offloader and using it with Pulsar."/><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>2.8.3</h3></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class="siteNavGroupActive"><a href="/docs/en/2.8.3/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/2.8.3/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/2.8.3/tiered-storage-azure">日本語</a></li><li><a href="/docs/fr/2.8.3/tiered-storage-azure">Français</a></li><li><a href="/docs/ko/2.8.3/tiered-storage-azure">한국어</a></li><li><a href="/docs/zh-CN/2.8.3/tiered-storage-azure">中文</a></li><li><a href="/docs/zh-TW/2.8.3/tiered-storage-azure">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/tiered-storage-azure.md" target="_blank" rel="noreferrer noopener">Edit</a><h1 id="__docusaurus" class="postHeaderTitle">Use Azure BlobStore offloader with Pulsar</h1></header><article><div><span><p>This chapter guides you through every step of installing and configuring the Azure BlobStore offloader and using it with Pulsar.</p>
<h2><a class="anchor" aria-hidden="true" id="installation"></a><a href="#installation" 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>Installation</h2>
<p>Follow the steps below to install the Azure BlobStore offloader.</p>
<h3><a class="anchor" aria-hidden="true" id="prerequisite"></a><a href="#prerequisite" 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>Prerequisite</h3>
<ul>
<li>Pulsar: 2.6.2 or later versions</li>
</ul>
<h3><a class="anchor" aria-hidden="true" id="step"></a><a href="#step" 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>Step</h3>
<p>This example uses Pulsar 2.6.2.</p>
<ol>
<li><p>Download the Pulsar tarball using one of the following ways:</p>
<ul>
<li><p>Download from the <a href="https://archive.apache.org/dist/pulsar/pulsar-2.6.2/apache-pulsar-2.6.2-bin.tar.gz">Apache mirror</a></p></li>
<li><p>Download from the Pulsar <a href="https://pulsar.apache.org/download">downloads page</a></p></li>
<li><p>Use <a href="https://www.gnu.org/software/wget">wget</a>:</p>
<pre><code class="hljs css language-shell">wget https://archive.apache.org/dist/pulsar/pulsar-2.6.2/apache-pulsar-2.6.2-bin.tar.gz
</code></pre></li>
</ul></li>
<li><p>Download and untar the Pulsar offloaders package.</p>
<pre><code class="hljs css language-bash">wget https://downloads.apache.org/pulsar/pulsar-2.6.2/apache-pulsar-offloaders-2.6.2-bin.tar.gz
tar xvfz apache-pulsar-offloaders-2.6.2-bin.tar.gz
</code></pre></li>
<li><p>Copy the Pulsar offloaders as <code>offloaders</code> in the Pulsar directory.</p>
<pre><code class="hljs">mv apache-pulsar-offloaders<span class="hljs-number">-2.6</span><span class="hljs-number">.2</span>/offloaders apache-pulsar<span class="hljs-number">-2.6</span><span class="hljs-number">.2</span>/offloaders
ls offloaders
</code></pre>
<p><strong>Output</strong></p>
<p>As shown from the output, Pulsar uses <a href="https://jclouds.apache.org">Apache jclouds</a> to support <a href="https://aws.amazon.com/s3/">AWS S3</a>, <a href="https://cloud.google.com/storage/">GCS</a> and <a href="https://portal.azure.com/#home">Azure</a> for long term storage.</p>
<pre><code class="hljs"><span class="hljs-selector-tag">tiered-storage-file-system-2</span><span class="hljs-selector-class">.6</span><span class="hljs-selector-class">.2</span><span class="hljs-selector-class">.nar</span>
<span class="hljs-selector-tag">tiered-storage-jcloud-2</span><span class="hljs-selector-class">.6</span><span class="hljs-selector-class">.2</span><span class="hljs-selector-class">.nar</span>
</code></pre>
<blockquote>
<h4><a class="anchor" aria-hidden="true" id="note"></a><a href="#note" 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>Note</h4>
<ul>
<li><p>If you are running Pulsar in a bare metal cluster, make sure that <code>offloaders</code> tarball is unzipped in every broker's Pulsar directory.</p></li>
<li><p>If you are running Pulsar in Docker or deploying Pulsar using a Docker image (such as K8s and DCOS), you can use the <code>apachepulsar/pulsar-all</code> image instead of the <code>apachepulsar/pulsar</code> image. <code>apachepulsar/pulsar-all</code> image has already bundled tiered storage offloaders.</p></li>
</ul>
</blockquote></li>
</ol>
<h2><a class="anchor" aria-hidden="true" id="configuration"></a><a href="#configuration" 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>Configuration</h2>
<blockquote>
<h4><a class="anchor" aria-hidden="true" id="note-1"></a><a href="#note-1" 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>Note</h4>
<p>Before offloading data from BookKeeper to Azure BlobStore, you need to configure some properties of the Azure BlobStore offload driver.</p>
</blockquote>
<p>Besides, you can also configure the Azure BlobStore offloader to run it automatically or trigger it manually.</p>
<h3><a class="anchor" aria-hidden="true" id="configure-azure-blobstore-offloader-driver"></a><a href="#configure-azure-blobstore-offloader-driver" 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>Configure Azure BlobStore offloader driver</h3>
<p>You can configure the Azure BlobStore offloader driver in the configuration file <code>broker.conf</code> or <code>standalone.conf</code>.</p>
<ul>
<li><p><strong>Required</strong> configurations are as below.</p>
<table>
<thead>
<tr><th>Required configuration</th><th>Description</th><th>Example value</th></tr>
</thead>
<tbody>
<tr><td><code>managedLedgerOffloadDriver</code></td><td>Offloader driver name</td><td>azureblob</td></tr>
<tr><td><code>offloadersDirectory</code></td><td>Offloader directory</td><td>offloaders</td></tr>
<tr><td><code>managedLedgerOffloadBucket</code></td><td>Bucket</td><td>pulsar-topic-offload</td></tr>
</tbody>
</table>
</li>
<li><p><strong>Optional</strong> configurations are as below.</p>
<table>
<thead>
<tr><th>Optional</th><th>Description</th><th>Example value</th></tr>
</thead>
<tbody>
<tr><td><code>managedLedgerOffloadReadBufferSizeInBytes</code></td><td>Size of block read</td><td>1 MB</td></tr>
<tr><td><code>managedLedgerOffloadMaxBlockSizeInBytes</code></td><td>Size of block write</td><td>64 MB</td></tr>
<tr><td><code>managedLedgerMinLedgerRolloverTimeMinutes</code></td><td>Minimum time between ledger rollover for a topic<br><br><strong>Note</strong>: it is not recommended that you set this configuration in the production environment.</td><td>2</td></tr>
<tr><td><code>managedLedgerMaxEntriesPerLedger</code></td><td>Maximum number of entries to append to a ledger before triggering a rollover.<br><br><strong>Note</strong>: it is not recommended that you set this configuration in the production environment.</td><td>5000</td></tr>
</tbody>
</table>
</li>
</ul>
<h4><a class="anchor" aria-hidden="true" id="bucket-required"></a><a href="#bucket-required" 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>Bucket (required)</h4>
<p>A bucket is a basic container that holds your data. Everything you store in Azure BlobStore must be contained in a bucket. You can use a bucket to organize your data and control access to your data, but unlike directory and folder, you cannot nest a bucket.</p>
<h5><a class="anchor" aria-hidden="true" id="example"></a><a href="#example" 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>Example</h5>
<p>This example names the bucket as <em>pulsar-topic-offload</em>.</p>
<pre><code class="hljs css language-conf"><span class="hljs-attr">managedLedgerOffloadBucket</span>=pulsar-topic-<span class="hljs-literal">off</span>load
</code></pre>
<h4><a class="anchor" aria-hidden="true" id="authentication-required"></a><a href="#authentication-required" 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>Authentication (required)</h4>
<p>To be able to access Azure BlobStore, you need to authenticate with Azure BlobStore.</p>
<ul>
<li><p>Set the environment variables <code>AZURE_STORAGE_ACCOUNT</code> and <code>AZURE_STORAGE_ACCESS_KEY</code> in <code>conf/pulsar_env.sh</code>.</p>
<p>&quot;export&quot; is important so that the variables are made available in the environment of spawned processes.</p>
<pre><code class="hljs css language-bash"><span class="hljs-built_in">export</span> AZURE_STORAGE_ACCOUNT=ABC123456789
<span class="hljs-built_in">export</span> AZURE_STORAGE_ACCESS_KEY=ded7db27a4558e2ea8bbf0bf37ae0e8521618f366c
</code></pre></li>
</ul>
<h4><a class="anchor" aria-hidden="true" id="size-of-block-readwrite"></a><a href="#size-of-block-readwrite" 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>Size of block read/write</h4>
<p>You can configure the size of a request sent to or read from Azure BlobStore in the configuration file <code>broker.conf</code> or <code>standalone.conf</code>.</p>
<table>
<thead>
<tr><th>Configuration</th><th>Description</th><th>Default value</th></tr>
</thead>
<tbody>
<tr><td><code>managedLedgerOffloadReadBufferSizeInBytes</code></td><td>Block size for each individual read when reading back data from Azure BlobStore store.</td><td>1 MB</td></tr>
<tr><td><code>managedLedgerOffloadMaxBlockSizeInBytes</code></td><td>Maximum size of a &quot;part&quot; sent during a multipart upload to Azure BlobStore store. It <strong>cannot</strong> be smaller than 5 MB.</td><td>64 MB</td></tr>
</tbody>
</table>
<h3><a class="anchor" aria-hidden="true" id="configure-azure-blobstore-offloader-to-run-automatically"></a><a href="#configure-azure-blobstore-offloader-to-run-automatically" 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>Configure Azure BlobStore offloader to run automatically</h3>
<p>Namespace policy can be configured to offload data automatically once a threshold is reached. The threshold is based on the size of data that a topic has stored on a Pulsar cluster. Once the topic reaches the threshold, an offloading operation is triggered automatically.</p>
<table>
<thead>
<tr><th>Threshold value</th><th>Action</th></tr>
</thead>
<tbody>
<tr><td>&gt; 0</td><td>It triggers the offloading operation if the topic storage reaches its threshold.</td></tr>
<tr><td>= 0</td><td>It causes a broker to offload data as soon as possible.</td></tr>
<tr><td>&lt; 0</td><td>It disables automatic offloading operation.</td></tr>
</tbody>
</table>
<p>Automatic offloading runs when a new segment is added to a topic log. If you set the threshold on a namespace, but few messages are being produced to the topic, offloader does not work until the current segment is full.</p>
<p>You can configure the threshold size using CLI tools, such as pulsar-admin.</p>
<p>The offload configurations in <code>broker.conf</code> and <code>standalone.conf</code> are used for the namespaces that do not have namespace level offload policies. Each namespace can have its own offload policy. If you want to set offload policy for each namespace, use the command <a href="https://pulsar.apache.org/tools/pulsar-admin/2.6.0-SNAPSHOT/#-em-set-offload-policies-em-"><code>pulsar-admin namespaces set-offload-policies options</code></a> command.</p>
<h4><a class="anchor" aria-hidden="true" id="example-1"></a><a href="#example-1" 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>Example</h4>
<p>This example sets the Azure BlobStore offloader threshold size to 10 MB using pulsar-admin.</p>
<pre><code class="hljs css language-bash">bin/pulsar-admin namespaces <span class="hljs-built_in">set</span>-offload-threshold --size 10M my-tenant/my-namespace
</code></pre>
<blockquote>
<h4><a class="anchor" aria-hidden="true" id="tip"></a><a href="#tip" 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>Tip</h4>
<p>For more information about the <code>pulsar-admin namespaces set-offload-threshold options</code> command, including flags, descriptions, and default values, see <a href="https://pulsar.apache.org/tools/pulsar-admin/2.6.0-SNAPSHOT/#-em-set-offload-threshold-em-">here</a>.</p>
</blockquote>
<h3><a class="anchor" aria-hidden="true" id="configure-azure-blobstore-offloader-to-run-manually"></a><a href="#configure-azure-blobstore-offloader-to-run-manually" 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>Configure Azure BlobStore offloader to run manually</h3>
<p>For individual topics, you can trigger Azure BlobStore offloader manually using one of the following methods:</p>
<ul>
<li><p>Use REST endpoint.</p></li>
<li><p>Use CLI tools (such as pulsar-admin).</p>
<p>To trigger it via CLI tools, you need to specify the maximum amount of data (threshold) that should be retained on a Pulsar cluster for a topic. If the size of the topic data on the Pulsar cluster exceeds this threshold, segments from the topic are moved to Azure BlobStore until the threshold is no longer exceeded. Older segments are moved first.</p></li>
</ul>
<h4><a class="anchor" aria-hidden="true" id="example-2"></a><a href="#example-2" 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>Example</h4>
<ul>
<li><p>This example triggers the Azure BlobStore offloader to run manually using pulsar-admin.</p>
<pre><code class="hljs css language-bash">bin/pulsar-admin topics offload --size-threshold 10M my-tenant/my-namespace/topic1
</code></pre>
<p><strong>Output</strong></p>
<pre><code class="hljs css language-bash">Offload triggered <span class="hljs-keyword">for</span> persistent://my-tenant/my-namespace/topic1 <span class="hljs-keyword">for</span> messages before 2:0:-1
</code></pre>
<blockquote>
<h4><a class="anchor" aria-hidden="true" id="tip-1"></a><a href="#tip-1" 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>Tip</h4>
<p>For more information about the <code>pulsar-admin topics offload options</code> command, including flags, descriptions, and default values, see <a href="https://pulsar.apache.org/tools/pulsar-admin/2.6.0-SNAPSHOT/#-em-offload-em-">here</a>.</p>
</blockquote></li>
<li><p>This example checks the Azure BlobStore offloader status using pulsar-admin.</p>
<pre><code class="hljs css language-bash">bin/pulsar-admin topics offload-status persistent://my-tenant/my-namespace/topic1
</code></pre>
<p><strong>Output</strong></p>
<pre><code class="hljs css language-bash">Offload is currently running
</code></pre>
<p>To wait for the Azure BlobStore offloader to complete the job, add the <code>-w</code> flag.</p>
<pre><code class="hljs css language-bash">bin/pulsar-admin topics offload-status -w persistent://my-tenant/my-namespace/topic1
</code></pre>
<p><strong>Output</strong></p>
<pre><code class="hljs"><span class="hljs-attribute">Offload was a success</span>
</code></pre>
<p>If there is an error in offloading, the error is propagated to the <code>pulsar-admin topics offload-status</code> command.</p>
<pre><code class="hljs css language-bash">bin/pulsar-admin topics offload-status persistent://my-tenant/my-namespace/topic1
</code></pre>
<p><strong>Output</strong></p>
<pre><code class="hljs"><span class="hljs-keyword">Error </span>in offload
null
Reason: Error offloading: org.apache.bookkeeper.mledger.ManagedLedgerException:
</code></pre>
<blockquote>
<h4><a class="anchor" aria-hidden="true" id="tip-2"></a><a href="#tip-2" 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>Tip</h4>
<p>For more information about the <code>pulsar-admin topics offload-status options</code> command, including flags, descriptions, and default values, see <a href="https://pulsar.apache.org/tools/pulsar-admin/2.6.0-SNAPSHOT/#-em-offload-status-em-">here</a>.</p>
</blockquote></li>
</ul>
</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/docs/en/2.8.3/tiered-storage-filesystem"><span class="arrow-prev">← </span><span>Filesystem offloader</span></a><a class="docs-next button" href="/docs/en/2.8.3/tiered-storage-aliyun"><span>Aliyun OSS offloader</span><span class="arrow-next"> →</span></a></div></div></div><nav class="onPageNav"><ul class="toc-headings"><li><a href="#installation">Installation</a><ul class="toc-headings"><li><a href="#prerequisite">Prerequisite</a></li><li><a href="#step">Step</a></li></ul></li><li><a href="#configuration">Configuration</a><ul class="toc-headings"><li><a href="#configure-azure-blobstore-offloader-driver">Configure Azure BlobStore offloader driver</a></li><li><a href="#configure-azure-blobstore-offloader-to-run-automatically">Configure Azure BlobStore offloader to run automatically</a></li><li><a href="#configure-azure-blobstore-offloader-to-run-manually">Configure Azure BlobStore offloader to run manually</a></li></ul></li></ul></nav></div><footer class="nav-footer" id="footer"><section class="copyright">Copyright © 2022 The Apache Software Foundation. All Rights Reserved. Apache, Apache Pulsar and the Apache feather logo are trademarks of The Apache Software Foundation.</section><span><script>
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