<!DOCTYPE html><html lang="en"><head><meta charSet="utf-8"/><meta http-equiv="X-UA-Compatible" content="IE=edge"/><title>Pulsar IO Overview · Apache Pulsar</title><meta name="viewport" content="width=device-width, initial-scale=1.0"/><meta name="generator" content="Docusaurus"/><meta name="description" content="Messaging systems are most powerful when you can easily use them in conjunction with external systems like databases and other messaging systems. **Pulsar IO** is a feature of Pulsar that enables you to easily create, deploy, and manage Pulsar **connectors** that interact with external systems, such as [Apache Cassandra](https://cassandra.apache.org), [Aerospike](https://www.aerospike.com), and many others."/><meta name="docsearch:version" content="2.1.1-incubating"/><meta name="docsearch:language" content="en"/><meta property="og:title" content="Pulsar IO Overview · Apache Pulsar"/><meta property="og:type" content="website"/><meta property="og:url" content="https://pulsar.apache.org/"/><meta property="og:description" content="Messaging systems are most powerful when you can easily use them in conjunction with external systems like databases and other messaging systems. **Pulsar IO** is a feature of Pulsar that enables you to easily create, deploy, and manage Pulsar **connectors** that interact with external systems, such as [Apache Cassandra](https://cassandra.apache.org), [Aerospike](https://www.aerospike.com), and many others."/><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>2.1.1-incubating</h3></a><div class="navigationWrapper navigationSlider"><nav class="slidingNav"><ul class="nav-site nav-site-internal"><li class="siteNavGroupActive"><a href="/docs/en/2.1.1-incubating/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/2.1.1-incubating/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/2.1.1-incubating/io-overview">日本語</a></li><li><a href="/docs/fr/2.1.1-incubating/io-overview">Français</a></li><li><a href="/docs/ko/2.1.1-incubating/io-overview">한국어</a></li><li><a href="/docs/zh-CN/2.1.1-incubating/io-overview">中文</a></li><li><a href="/docs/zh-TW/2.1.1-incubating/io-overview">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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Docker</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.1.1-incubating/client-libraries">Client libraries</a></li></ul></div><div class="navGroup"><h3 class="navGroupCategoryTitle">Concepts and Architecture</h3><ul class=""><li class="navListItem"><a class="navItem" href="/docs/en/2.1.1-incubating/concepts-overview">Overview</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.1.1-incubating/concepts-messaging">Messaging</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.1.1-incubating/concepts-architecture-overview">Architecture</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.1.1-incubating/concepts-clients">Clients</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.1.1-incubating/concepts-replication">Geo Replication</a></li><li class="navListItem"><a class="navItem" href="/docs/en/2.1.1-incubating/concepts-multi-tenancy">Multi Tenancy</a></li><li class="navListItem"><a class="navItem" 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<blockquote>
<h4><a class="anchor" aria-hidden="true" id="pulsar-io-and-pulsar-functions"></a><a href="#pulsar-io-and-pulsar-functions" 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>Pulsar IO and Pulsar Functions</h4>
<p>Under the hood, Pulsar IO connectors are specialized <a href="/docs/en/2.1.1-incubating/functions-overview">Pulsar Functions</a> purpose-built to interface with external systems. The <a href="/docs/en/2.1.1-incubating/io-quickstart">administrative interface</a> for Pulsar IO is, in fact, quite similar to that of Pulsar Functions.</p>
</blockquote>
<h2><a class="anchor" aria-hidden="true" id="sources-and-sinks"></a><a href="#sources-and-sinks" 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>Sources and sinks</h2>
<p>Pulsar IO connectors come in two types:</p>
<ul>
<li><strong>Sources</strong> feed data <em>into</em> Pulsar from other systems. Common sources include other messaging systems and &quot;firehose&quot;-style data pipeline APIs.</li>
<li><strong>Sinks</strong> are fed data <em>from</em> Pulsar. Common sinks include other messaging systems and SQL and NoSQL databases.</li>
</ul>
<p>This diagram illustrates the relationship between sources, sinks, and Pulsar:</p>
<p><img src="/docs/assets/pulsar-io.png" alt="Pulsar IO diagram" title="Pulsar IO connectors (sources and sinks)"></p>
<h2><a class="anchor" aria-hidden="true" id="working-with-connectors"></a><a href="#working-with-connectors" 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>Working with connectors</h2>
<p>Pulsar IO connectors can be managed via the <a href="/docs/en/2.1.1-incubating/reference-pulsar-admin"><code>pulsar-admin</code></a> CLI tool, in particular the <a href="/docs/en/2.1.1-incubating/reference-pulsar-admin#source"><code>source</code></a> and <a href="/docs/en/2.1.1-incubating/reference-pulsar-admin#sink"><code>sink</code></a> commands.</p>
<blockquote>
<p>For a guide to managing connectors in your Pulsar installation, see the <a href="/docs/en/2.1.1-incubating/io-quickstart">Getting started with Pulsar IO</a></p>
</blockquote>
<p>The following connectors are currently available for Pulsar:</p>
<table>
<thead>
<tr><th>Name</th><th>Java Class</th><th>Documentation</th></tr>
</thead>
<tbody>
<tr><td><a href="https://www.aerospike.com/">Aerospike sink</a></td><td><a href="https://github.com/apache/incubator-pulsar/blob/master/pulsar-io/aerospike/src/main/java/org/apache/pulsar/io/aerospike/AerospikeStringSink.java"><code>org.apache.pulsar.io.aerospike.AerospikeSink</code></a></td><td><a href="/docs/en/2.1.1-incubating/io-aerospike">Documentation</a></td></tr>
<tr><td><a href="https://cassandra.apache.org">Cassandra sink</a></td><td><a href="https://github.com/apache/incubator-pulsar/blob/master/pulsar-io/cassandra/src/main/java/org/apache/pulsar/io/cassandra/CassandraStringSink.java"><code>org.apache.pulsar.io.cassandra.CassandraSink</code></a></td><td><a href="/docs/en/2.1.1-incubating/io-cassandra">Documentation</a></td></tr>
<tr><td><a href="https://kafka.apache.org">Kafka source</a></td><td><a href="https://github.com/apache/incubator-pulsar/blob/master/pulsar-io/kafka/src/main/java/org/apache/pulsar/io/kafka/KafkaStringSource.java"><code>org.apache.pulsar.io.kafka.KafkaSource</code></a></td><td><a href="/docs/en/2.1.1-incubating/io-kafka#source">Documentation</a></td></tr>
<tr><td><a href="https://kafka.apache.org">Kafka sink</a></td><td><a href="https://github.com/apache/incubator-pulsar/blob/master/pulsar-io/kafka/src/main/java/org/apache/pulsar/io/kafka/KafkaStringSink.java"><code>org.apache.pulsar.io.kafka.KafkaSink</code></a></td><td><a href="/docs/en/2.1.1-incubating/io-kafka#sink">Documentation</a></td></tr>
<tr><td><a href="https://aws.amazon.com/kinesis/">Kinesis sink</a></td><td><a href="https://github.com/apache/incubator-pulsar/blob/master/pulsar-io/kinesis/src/main/java/org/apache/pulsar/io/kinesis/KinesisSink.java"><code>org.apache.pulsar.io.kinesis.KinesisSink</code></a></td><td><a href="/docs/en/2.1.1-incubating/io-kinesis#sink">Documentation</a></td></tr>
<tr><td><a href="https://www.rabbitmq.com">RabbitMQ source</a></td><td><a href="https://github.com/apache/incubator-pulsar/blob/master/pulsar-io/rabbitmq/src/main/java/org/apache/pulsar/io/rabbitmq/RabbitMQSource.java"><code>org.apache.pulsar.io.rabbitmq.RabbitMQSource</code></a></td><td><a href="/docs/en/2.1.1-incubating/io-rabbitmq#sink">Documentation</a></td></tr>
<tr><td><a href="https://developer.twitter.com/en/docs">Twitter Firehose source</a></td><td><a href="https://github.com/apache/incubator-pulsar/blob/master/pulsar-io/twitter/src/main/java/org/apache/pulsar/io/twitter/TwitterFireHose.java">org.apache.pulsar.io.twitter.TwitterFireHose</a></td><td><a href="/docs/en/2.1.1-incubating/io-twitter#source">Documentation</a></td></tr>
</tbody>
</table>
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