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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">Deployment & Operations</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">Deployment Method</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: 4.x</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>Deployment Method</h1><h2 class="anchor anchorWithStickyNavbar_LWe7" id="single-master-mode">Single Master mode<a href="#single-master-mode" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><div class="theme-admonition theme-admonition-caution alert alert--warning admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewBox="0 0 16 16"><path fill-rule="evenodd" d="M8.893 1.5c-.183-.31-.52-.5-.887-.5s-.703.19-.886.5L.138 13.499a.98.98 0 0 0 0 1.001c.193.31.53.501.886.501h13.964c.367 0 .704-.19.877-.5a1.03 1.03 0 0 0 .01-1.002L8.893 1.5zm.133 11.497H6.987v-2.003h2.039v2.003zm0-3.004H6.987V5.987h2.039v4.006z"></path></svg></span>caution</div><div class="admonitionContent_S0QG"><p>This mode carries a higher risk, as a restart or failure of the Broker will result in the entire service being unavailable. It is not recommended in online environments, but can be used for local testing.</p></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="start-nameserver">Start NameServer<a href="#start-nameserver" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic">### Start Name Server first</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqnamesrv </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### Verify if the Name Server has started successfully</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">tail</span><span class="token plain"> -f ~/logs/rocketmqlogs/namesrv.log</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">The Name Server boot success</span><span class="token punctuation" style="color:#393A34">..</span><span class="token plain">.</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="start-broker">Start Broker<a href="#start-broker" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic">### Start Broker</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> bin/mqbroker -n localhost:9876 </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### Verify that the Broker has started successfully, for example, the broker IP is 192.168.1.2, and the name is broker-a</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">tail</span><span class="token plain"> -f ~/logs/rocketmqlogs/Broker.log </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">The broker</span><span class="token punctuation" style="color:#393A34">[</span><span class="token plain">broker-a, </span><span class="token number" style="color:#36acaa">192.169</span><span class="token plain">.1.2:10911</span><span class="token punctuation" style="color:#393A34">]</span><span class="token plain"> boot success</span><span class="token punctuation" style="color:#393A34">..</span><span class="token plain">.</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="multiple-master-mode">Multiple master mode<a href="#multiple-master-mode" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><p>The advantages and disadvantages of a cluster which is full of masters without slaves (e.g. 2 or 3 masters) is as follows:</p><ul><li>Advantages: simple configuration, no impact on the application when a single master is restarted or down, when the disk is configured as RAID10, even if the machine is down and cannot be recovered, due to the reliability of RAID10 disks, messages will not be lost (asynchronous flush loses a small number of messages, synchronous flush does not lose a single message), and the performance is the highest;</li><li>Disadvantages: During the downtime of a single machine, the messages that have not been consumed on this machine are not available for subscription before the machine is recovered, and the real-time nature of the messages will be affected.</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="start-nameserver-1">Start NameServer<a href="#start-nameserver-1" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><p>NameServer needs to start before Broker, and if used in a production environment, it is recommended to start 3 NameServers for general scale clusters, and the start commands for each node are the same, as follows:</p><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic">### Start Name Server first</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqnamesrv </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### Verify if the Name Server has started successfully</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">tail</span><span class="token plain"> -f ~/logs/rocketmqlogs/namesrv.log</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">The Name Server boot success</span><span class="token punctuation" style="color:#393A34">..</span><span class="token plain">.</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="start-broker-cluster">Start Broker cluster<a href="#start-broker-cluster" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic">### On machine A, start the first Master, for example, the IP of the NameServer is: 192.168.1.1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqbroker -n </span><span class="token number" style="color:#36acaa">192.168</span><span class="token plain">.1.1:9876 -c </span><span class="token variable" style="color:#36acaa">$ROCKETMQ_HOME</span><span class="token plain">/conf/2m-noslave/broker-a.properties </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### On machine B, start the second Master, for example, the IP of the NameServer is: 192.168.1.1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqbroker -n </span><span class="token number" style="color:#36acaa">192.168</span><span class="token plain">.1.1:9876 -c </span><span class="token variable" style="color:#36acaa">$ROCKETMQ_HOME</span><span class="token plain">/conf/2m-noslave/broker-b.properties </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">..</span><span class="token plain">.</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><div class="theme-admonition theme-admonition-note alert alert--secondary admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewBox="0 0 14 16"><path fill-rule="evenodd" d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z"></path></svg></span>note</div><div class="admonitionContent_S0QG"><p>The above startup command is used in the case of a single NameServer. For clusters with multiple NameServers, the address list after the <code>-n</code> in the Broker startup command can be separated by semicolons, for example <code>192.168.1.1:9876;192.161.2:9876</code>.</p></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="multiple-master-multiple-slave-mode-asynchronous-replication">Multiple Master-Multiple Slave mode-asynchronous replication<a href="#multiple-master-multiple-slave-mode-asynchronous-replication" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><p>Each Master is configured with one Slave, resulting in multiple Master-Slave pairs. In this High Availability (HA) setup, there is a brief message delay (in the milliseconds range) due to asynchronous replication. The advantages and disadvantages of this mode are as follows:</p><ul><li><p>Advantages: In the event of disk damage, the number of lost messages is minimal and the real-time nature of messages is not affected. Additionally, even if the Master goes down, consumers can still consume from the Slave, and this process is transparent to the application and does not require manual intervention, with performance being almost the same as the Multiple Master mode.</p></li><li><p>Disadvantages: In the event of a Master outage or disk damage, a small number of messages may be lost.</p></li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="start-nameserver-2">Start NameServer<a href="#start-nameserver-2" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic">### Start NameServer first</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqnamesrv </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### Verify that the Name Server has started successfully.</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">tail</span><span class="token plain"> -f ~/logs/rocketmqlogs/namesrv.log</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">The Name Server boot success</span><span class="token punctuation" style="color:#393A34">..</span><span class="token plain">.</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="start-broker-cluster-1">Start Broker cluster<a href="#start-broker-cluster-1" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic">### On machine A, start the first Master, for example, the IP of the NameServer is: 192.168.1.1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqbroker -n </span><span class="token number" style="color:#36acaa">192.168</span><span class="token plain">.1.1:9876 -c </span><span class="token variable" style="color:#36acaa">$ROCKETMQ_HOME</span><span class="token plain">/conf/2m-2s-async/broker-a.properties </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### On machine B, start the second Master, for example, the IP of the NameServer is: 192.168.1.1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqbroker -n </span><span class="token number" style="color:#36acaa">192.168</span><span class="token plain">.1.1:9876 -c </span><span class="token variable" style="color:#36acaa">$ROCKETMQ_HOME</span><span class="token plain">/conf/2m-2s-async/broker-b.properties </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### On machine C, start the first slave, for example, the IP of the NameServer is: 192.168.1.1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqbroker -n </span><span class="token number" style="color:#36acaa">192.168</span><span class="token plain">.1.1:9876 -c </span><span class="token variable" style="color:#36acaa">$ROCKETMQ_HOME</span><span class="token plain">/conf/2m-2s-async/broker-a-s.properties </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### On machine D, start the second slave, for example, the IP of the NameServer is: 192.168.1.1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqbroker -n </span><span class="token number" style="color:#36acaa">192.168</span><span class="token plain">.1.1:9876 -c </span><span class="token variable" style="color:#36acaa">$ROCKETMQ_HOME</span><span class="token plain">/conf/2m-2s-async/broker-b-s.properties </span><span class="token operator" style="color:#393A34">&</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="multiple-master-multiple-slave-mode-synchronous-dual-writes">Multiple Master-Multiple Slave mode-synchronous dual writes<a href="#multiple-master-multiple-slave-mode-synchronous-dual-writes" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h2><p>Each Master is configured with one Slave, resulting in multiple Master-Slave pairs. In this High Availability (HA) setup, synchronous dual writes are used, meaning that success is only returned to the application if both the Master and the Slave write successfully. The advantages and disadvantages of this mode are as follows:</p><ul><li><p>Advantages: There are no single points of failure for either data or service, and in the event of a Master outage, there is no message delay and both service availability and data availability are very high.</p></li><li><p>Disadvantages: Performance is slightly lower than the asynchronous replication mode (about 10% lower), the round-trip time for sending a single message is slightly higher, and in the current version, the standby cannot automatically switch to the primary after the primary node goes down.</p></li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="start-nameserver-3">Start NameServer<a href="#start-nameserver-3" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic">### Start NameServer first</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqnamesrv </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### Verify that the Name Server has started successfully.</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">tail</span><span class="token plain"> -f ~/logs/rocketmqlogs/namesrv.log</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">The Name Server boot success</span><span class="token punctuation" style="color:#393A34">..</span><span class="token plain">.</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="start-broker-cluster-2">Start Broker cluster<a href="#start-broker-cluster-2" class="hash-link" aria-label="Direct link to heading" title="Direct link to heading"></a></h3><div class="language-bash codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-bash codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token comment" style="color:#999988;font-style:italic">### On machine A, start the first Master, for example, the IP of the NameServer is: 192.168.1.1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqbroker -n </span><span class="token number" style="color:#36acaa">192.168</span><span class="token plain">.1.1:9876 -c </span><span class="token variable" style="color:#36acaa">$ROCKETMQ_HOME</span><span class="token plain">/conf/2m-2s-sync/broker-a.properties </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### On machine A, start the second Master, for example, the IP of the NameServer is: 192.168.1.1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqbroker -n </span><span class="token number" style="color:#36acaa">192.168</span><span class="token plain">.1.1:9876 -c </span><span class="token variable" style="color:#36acaa">$ROCKETMQ_HOME</span><span class="token plain">/conf/2m-2s-sync/broker-b.properties </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### On machine C, start the first slave, for example, the IP of the NameServer is: 192.168.1.1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqbroker -n </span><span class="token number" style="color:#36acaa">192.168</span><span class="token plain">.1.1:9876 -c </span><span class="token variable" style="color:#36acaa">$ROCKETMQ_HOME</span><span class="token plain">/conf/2m-2s-sync/broker-a-s.properties </span><span class="token operator" style="color:#393A34">&</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token comment" style="color:#999988;font-style:italic">### On machine D, start the second slave, for example, the IP of the NameServer is: 192.168.1.1</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">$ </span><span class="token function" style="color:#d73a49">nohup</span><span class="token plain"> </span><span class="token function" style="color:#d73a49">sh</span><span class="token plain"> mqbroker -n </span><span class="token number" style="color:#36acaa">192.168</span><span class="token plain">.1.1:9876 -c </span><span class="token variable" style="color:#36acaa">$ROCKETMQ_HOME</span><span class="token plain">/conf/2m-2s-sync/broker-b-s.properties </span><span class="token operator" style="color:#393A34">&</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><div class="theme-admonition theme-admonition-tip alert alert--success admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewBox="0 0 12 16"><path fill-rule="evenodd" d="M6.5 0C3.48 0 1 2.19 1 5c0 .92.55 2.25 1 3 1.34 2.25 1.78 2.78 2 4v1h5v-1c.22-1.22.66-1.75 2-4 .45-.75 1-2.08 1-3 0-2.81-2.48-5-5.5-5zm3.64 7.48c-.25.44-.47.8-.67 1.11-.86 1.41-1.25 2.06-1.45 3.23-.02.05-.02.11-.02.17H5c0-.06 0-.13-.02-.17-.2-1.17-.59-1.83-1.45-3.23-.2-.31-.42-.67-.67-1.11C2.44 6.78 2 5.65 2 5c0-2.2 2.02-4 4.5-4 1.22 0 2.36.42 3.22 1.19C10.55 2.94 11 3.94 11 5c0 .66-.44 1.78-.86 2.48zM4 14h5c-.23 1.14-1.3 2-2.5 2s-2.27-.86-2.5-2z"></path></svg></span>tip</div><div class="admonitionContent_S0QG"><p>The pairing of the above Broker and Slave is done by specifying the same BrokerName parameter. The BrokerId of the Master must be 0, and the BrokerId of the Slave must be a number greater than 0. In addition, multiple Slaves can be mounted under one Master, and multiple Slaves under the same Master are distinguished by specifying different BrokerIds. $ROCKETMQ_HOME refers to the RocketMQ installation directory, which the user needs to set as an environment variable.</p></div></div></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/apache/rocketmq-site/tree/new-official-website/docs/04-deployment/01deploy.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"></div></div></footer></article><nav class="pagination-nav 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