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| <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>IoTDB User Guide (latest)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>IoTDB Introduction</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Quick Start</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Data Concept</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Syntax Conventions</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>API</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Operate Metadata</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Write and Delete Data</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Query Data</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Process Data</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Administration Management</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>Maintenance Tools</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/UserGuide/Master/Maintenance-Tools/Maintenance-Command.html" aria-current="page" class="active sidebar-link">Maintenance Command</a></li><li><a href="/UserGuide/Master/Maintenance-Tools/Monitor-and-Log-Tools.html" class="sidebar-link">Monitor and Log Tools</a></li><li><a href="/UserGuide/Master/Maintenance-Tools/JMX-Tool.html" class="sidebar-link">JMX Tool</a></li><li><a href="/UserGuide/Master/Maintenance-Tools/MLogParser-Tool.html" class="sidebar-link">MLogParser Tool</a></li><li><a href="/UserGuide/Master/Maintenance-Tools/NodeTool.html" class="sidebar-link">Node Tool</a></li><li><a href="/UserGuide/Master/Maintenance-Tools/Watermark-Tool.html" class="sidebar-link">Watermark Tool</a></li><li><a href="/UserGuide/Master/Maintenance-Tools/Metric-Tool.html" class="sidebar-link">Metric Tool</a></li><li><a href="/UserGuide/Master/Maintenance-Tools/Sync-Tool.html" class="sidebar-link">Sync Tool</a></li><li><a href="/UserGuide/Master/Maintenance-Tools/TsFile-Split-Tool.html" class="sidebar-link">TsFile Split Tool</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Ecosystem Integration</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Cluster</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>UDF Library</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Reference</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="maintenance-command"><a href="#maintenance-command" class="header-anchor">#</a> Maintenance Command</h1> <h2 id="flush"><a href="#flush" class="header-anchor">#</a> FLUSH</h2> <p>Persist all the data points in the memory table of the storage group to the disk, and seal the data file.</p> <p>Note: This command does not need to be invoked manually by the client. IoTDB has WAL to ensure data security |
| and IoTDB will flush when appropriate. |
| Frequently call flush can result in small data files that degrade query performance.</p> <div class="language-sql line-numbers-mode"><pre class="language-sql"><code>IoTDB<span class="token operator">></span> FLUSH |
| IoTDB<span class="token operator">></span> FLUSH root<span class="token punctuation">.</span>ln |
| IoTDB<span class="token operator">></span> FLUSH root<span class="token punctuation">.</span>sg1<span class="token punctuation">,</span>root<span class="token punctuation">.</span>sg2 |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><h2 id="merge"><a href="#merge" class="header-anchor">#</a> MERGE</h2> <p>Execute Level Compaction and unsequence Compaction task. Currently IoTDB supports the following two types of SQL to manually trigger the compaction process of data files:</p> <ul><li><code>MERGE</code> Execute the level compaction first and then execute the unsequence compaction. In unsequence compaction process, this command is executed very fast by rewriting the overlapped Chunks only, while there is some redundant data on the disk eventually.</li> <li><code>FULL MERGE</code> Execute the level compaction first and then execute the unsequence compaction. In unsequence compaction process, this command is executed slow due to it takes more time to rewrite all data in overlapped files. However, there won't be any redundant data on the disk eventually.</li></ul> <div class="language-sql line-numbers-mode"><pre class="language-sql"><code>IoTDB<span class="token operator">></span> <span class="token keyword">MERGE</span> |
| IoTDB<span class="token operator">></span> <span class="token keyword">FULL</span> <span class="token keyword">MERGE</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><h2 id="clear-cache"><a href="#clear-cache" class="header-anchor">#</a> CLEAR CACHE</h2> <p>Clear the cache of chunk, chunk metadata and timeseries metadata to release the memory footprint.</p> <div class="language-sql line-numbers-mode"><pre class="language-sql"><code>IoTDB<span class="token operator">></span> CLEAR CACHE |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><h2 id="set-ststem-to-readonly-writable"><a href="#set-ststem-to-readonly-writable" class="header-anchor">#</a> SET STSTEM TO READONLY / WRITABLE</h2> <p>Manually set IoTDB system to read-only or writable mode.</p> <div class="language-sql line-numbers-mode"><pre class="language-sql"><code>IoTDB<span class="token operator">></span> <span class="token keyword">SET</span> SYSTEM <span class="token keyword">TO</span> READONLY |
| IoTDB<span class="token operator">></span> <span class="token keyword">SET</span> SYSTEM <span class="token keyword">TO</span> WRITABLE |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><h2 id="timeout"><a href="#timeout" class="header-anchor">#</a> Timeout</h2> <p>IoTDB supports session and query level timeout.</p> <h3 id="session-timeout"><a href="#session-timeout" class="header-anchor">#</a> Session timeout</h3> <p>Session timeout controls when idle sessions are closed. An idle session is one that had not initiated any query or non-query operations for a period of time.</p> <p>Session timeout is disabled by default and can be set using the <code>session_timeout_threshold</code> parameter in IoTDB configuration file.</p> <h3 id="query-timeout"><a href="#query-timeout" class="header-anchor">#</a> Query timeout</h3> <p>For queries that take too long to execute, IoTDB will forcibly interrupt the query and throw a timeout exception, as shown in the figure:</p> <div class="language-sql line-numbers-mode"><pre class="language-sql"><code>IoTDB<span class="token operator">></span> <span class="token keyword">select</span> <span class="token operator">*</span> <span class="token keyword">from</span> root<span class="token punctuation">;</span> |
| Msg: <span class="token number">701</span> <span class="token keyword">Current</span> query <span class="token operator">is</span> <span class="token keyword">time</span> <span class="token keyword">out</span><span class="token punctuation">,</span> please <span class="token keyword">check</span> your statement <span class="token operator">or</span> <span class="token keyword">modify</span> timeout parameter<span class="token punctuation">.</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p>The default timeout of a query is 60000 ms，which can be customized in the configuration file through the <code>query_timeout_threshold</code> parameter.</p> <p>If you use JDBC or Session, we also support setting a timeout for a single query（Unit: ms）：</p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token class-name">IoTDBStatement</span><span class="token punctuation">)</span> statement<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">executeQuery</span><span class="token punctuation">(</span><span class="token class-name">String</span> sql<span class="token punctuation">,</span> <span class="token keyword">long</span> timeoutInMS<span class="token punctuation">)</span> |
| session<span class="token punctuation">.</span><span class="token function">executeQueryStatement</span><span class="token punctuation">(</span><span class="token class-name">String</span> sql<span class="token punctuation">,</span> <span class="token keyword">long</span> timeout<span class="token punctuation">)</span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><blockquote><p>If the timeout parameter is not configured or with a negative number, the default timeout time will be used. |
| If value 0 is used, timeout function will be disabled.</p></blockquote> <h3 id="query-abort"><a href="#query-abort" class="header-anchor">#</a> Query abort</h3> <p>In addition to waiting for the query to time out passively, IoTDB also supports stopping the query actively:</p> <div class="language-sql line-numbers-mode"><pre class="language-sql"><code><span class="token keyword">KILL</span> QUERY <span class="token operator"><</span>queryId<span class="token operator">></span> |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>You can abort the specified query by specifying <code>queryId</code>. If <code>queryId</code> is not specified, all executing queries will be killed.</p> <p>To get the executing <code>queryId</code>，you can use the <code>show query processlist</code> command，which will show the list of all executing queries，with the following result set：</p> <table><thead><tr><th>Time</th> <th>queryId</th> <th>statement</th></tr></thead> <tbody><tr><td></td> <td></td> <td></td></tr></tbody></table> <p>The maximum display length of statement is 64 characters. For statements with more than 64 characters, the intercepted part will be displayed.</p> <h2 id="monitoring-tool-for-cluster-region-distribution"><a href="#monitoring-tool-for-cluster-region-distribution" class="header-anchor">#</a> Monitoring tool for cluster Region distribution</h2> <p>A cluster uses a Region as a unit for data replication and data management . The Region status and distribution is helpful for system operation and maintenance testing , as shown in the following scenario ：</p> <ul><li>Check which Datanodes are allocated to each Region in the cluster and whether the balance is correct.</li></ul> <p>Currently, IoTDB supports Region query using the following SQL：</p> <ul><li><code>SHOW REGIONS</code>: Show all Region</li> <li><code>SHOW SCHEMA REGIONS</code>: Show all SchemaRegion distribution</li> <li><code>SHOW DATA REGIONS</code>: Show all DataRegion distribution</li> <li><code>SHOW (DATA|SCHEMA)? REGIONS OF STORAGE GROUP <sg1,sg2,...></code>: Show region distribution of specified storage groups</li></ul> <div class="language-sql line-numbers-mode"><pre class="language-sql"><code>IoTDB<span class="token operator">></span> <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1 <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">BOOLEAN</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>PLAIN |
| Msg: The statement <span class="token operator">is</span> executed successfully<span class="token punctuation">.</span> |
| IoTDB<span class="token operator">></span> <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d2<span class="token punctuation">.</span>s1 <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">BOOLEAN</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>PLAIN |
| Msg: The statement <span class="token operator">is</span> executed successfully<span class="token punctuation">.</span> |
| IoTDB<span class="token operator">></span> <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1 <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">BOOLEAN</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>PLAIN |
| Msg: The statement <span class="token operator">is</span> executed successfully<span class="token punctuation">.</span> |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> regions |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span>storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg<span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">3</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6671</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>ln<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6667</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0.035</span>s |
| |
| IoTDB<span class="token operator">></span> <span class="token keyword">insert</span> <span class="token keyword">into</span> root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d1<span class="token punctuation">(</span><span class="token keyword">timestamp</span><span class="token punctuation">,</span>s1<span class="token punctuation">)</span> <span class="token keyword">values</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span><span class="token boolean">true</span><span class="token punctuation">)</span> |
| Msg: The statement <span class="token operator">is</span> executed successfully<span class="token punctuation">.</span> |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> regions |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span>storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg<span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">3</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6671</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> DataRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6669</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>ln<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6667</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">3</span> |
| It costs <span class="token number">0.010</span>s |
| |
| IoTDB<span class="token operator">></span> <span class="token keyword">insert</span> <span class="token keyword">into</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>d1<span class="token punctuation">(</span><span class="token keyword">timestamp</span><span class="token punctuation">,</span>s1<span class="token punctuation">)</span> <span class="token keyword">values</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span><span class="token boolean">true</span><span class="token punctuation">)</span> |
| Msg: The statement <span class="token operator">is</span> executed successfully<span class="token punctuation">.</span> |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> <span class="token keyword">data</span> regions |
| <span class="token operator">+</span><span class="token comment">--------+----------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span>storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+----------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span>DataRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6669</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span>DataRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>ln<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6669</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+----------+------+-------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0.011</span>s |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> <span class="token keyword">schema</span> regions |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span>storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg<span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">3</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6671</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>ln<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6667</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0.012</span>s |
| |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> regions <span class="token keyword">of</span> storage <span class="token keyword">group</span> root<span class="token punctuation">.</span>sg1 |
| <span class="token keyword">show</span> regions <span class="token keyword">of</span> storage <span class="token keyword">group</span> root<span class="token punctuation">.</span>sg1 |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span>storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">10</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg1<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">4</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6669</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">11</span><span class="token operator">|</span> DataRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg1<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">5</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6671</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0.005</span>s |
| |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> regions <span class="token keyword">of</span> storage <span class="token keyword">group</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">,</span> root<span class="token punctuation">.</span>sg2 |
| <span class="token keyword">show</span> regions <span class="token keyword">of</span> storage <span class="token keyword">group</span> root<span class="token punctuation">.</span>sg1<span class="token punctuation">,</span> root<span class="token punctuation">.</span>sg2 |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span>storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">10</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg1<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">4</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6669</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">11</span><span class="token operator">|</span> DataRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg1<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">5</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6671</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">12</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg2<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">4</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6669</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">13</span><span class="token operator">|</span> DataRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg2<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">4</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6669</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">4</span> |
| It costs <span class="token number">0.005</span>s |
| |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> regions <span class="token keyword">of</span> storage <span class="token keyword">group</span> root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token punctuation">.</span>sg_2 |
| <span class="token keyword">show</span> regions <span class="token keyword">of</span> storage <span class="token keyword">group</span> root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token punctuation">.</span>sg_2 |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+--------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span> storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+--------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">14</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span>root<span class="token punctuation">.</span>sg_1<span class="token punctuation">.</span>sg_2<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">3</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6667</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">15</span><span class="token operator">|</span> DataRegion<span class="token operator">|</span> Up<span class="token operator">|</span>root<span class="token punctuation">.</span>sg_1<span class="token punctuation">.</span>sg_2<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">5</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6671</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+--------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0.004</span>s |
| |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> <span class="token keyword">data</span> regions <span class="token keyword">of</span> storage <span class="token keyword">group</span> root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token punctuation">.</span>sg_2 |
| <span class="token keyword">show</span> <span class="token keyword">data</span> regions <span class="token keyword">of</span> storage <span class="token keyword">group</span> root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token punctuation">.</span>sg_2 |
| <span class="token operator">+</span><span class="token comment">--------+----------+------+--------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span> storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+----------+------+--------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">15</span><span class="token operator">|</span>DataRegion<span class="token operator">|</span> Up<span class="token operator">|</span>root<span class="token punctuation">.</span>sg_1<span class="token punctuation">.</span>sg_2<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">5</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6671</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+----------+------+--------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">1</span> |
| It costs <span class="token number">0.004</span>s |
| |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> <span class="token keyword">schema</span> regions <span class="token keyword">of</span> storage <span class="token keyword">group</span> root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token punctuation">.</span>sg_2 |
| <span class="token keyword">show</span> <span class="token keyword">schema</span> regions <span class="token keyword">of</span> storage <span class="token keyword">group</span> root<span class="token punctuation">.</span><span class="token operator">*</span><span class="token punctuation">.</span>sg_2 |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+--------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span> storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+--------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">14</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span>root<span class="token punctuation">.</span>sg_1<span class="token punctuation">.</span>sg_2<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">5</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6671</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+--------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">1</span> |
| It costs <span class="token number">0.102</span>s |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br><span class="line-number">51</span><br><span class="line-number">52</span><br><span class="line-number">53</span><br><span class="line-number">54</span><br><span class="line-number">55</span><br><span class="line-number">56</span><br><span class="line-number">57</span><br><span class="line-number">58</span><br><span class="line-number">59</span><br><span class="line-number">60</span><br><span class="line-number">61</span><br><span class="line-number">62</span><br><span class="line-number">63</span><br><span class="line-number">64</span><br><span class="line-number">65</span><br><span class="line-number">66</span><br><span class="line-number">67</span><br><span class="line-number">68</span><br><span class="line-number">69</span><br><span class="line-number">70</span><br><span class="line-number">71</span><br><span class="line-number">72</span><br><span class="line-number">73</span><br><span class="line-number">74</span><br><span class="line-number">75</span><br><span class="line-number">76</span><br><span class="line-number">77</span><br><span class="line-number">78</span><br><span class="line-number">79</span><br><span class="line-number">80</span><br><span class="line-number">81</span><br><span class="line-number">82</span><br><span class="line-number">83</span><br><span class="line-number">84</span><br><span class="line-number">85</span><br><span class="line-number">86</span><br><span class="line-number">87</span><br><span class="line-number">88</span><br><span class="line-number">89</span><br><span class="line-number">90</span><br><span class="line-number">91</span><br><span class="line-number">92</span><br><span class="line-number">93</span><br><span class="line-number">94</span><br><span class="line-number">95</span><br><span class="line-number">96</span><br><span class="line-number">97</span><br><span class="line-number">98</span><br><span class="line-number">99</span><br><span class="line-number">100</span><br><span class="line-number">101</span><br><span class="line-number">102</span><br><span class="line-number">103</span><br><span class="line-number">104</span><br></div></div><h2 id="monitoring-tool-for-cluster-node-distribution"><a href="#monitoring-tool-for-cluster-node-distribution" class="header-anchor">#</a> Monitoring tool for cluster Node distribution</h2> <h3 id="show-all-datanode-information"><a href="#show-all-datanode-information" class="header-anchor">#</a> Show all DataNode information</h3> <p>Currently, IoTDB supports DataNode query using the following SQL：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW DATANODES |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>Eg :</p> <div class="language-sql line-numbers-mode"><pre class="language-sql"><code>IoTDB<span class="token operator">></span> <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1 <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">BOOLEAN</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>PLAIN |
| Msg: The statement <span class="token operator">is</span> executed successfully<span class="token punctuation">.</span> |
| IoTDB<span class="token operator">></span> <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>sg<span class="token punctuation">.</span>d2<span class="token punctuation">.</span>s1 <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">BOOLEAN</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>PLAIN |
| Msg: The statement <span class="token operator">is</span> executed successfully<span class="token punctuation">.</span> |
| IoTDB<span class="token operator">></span> <span class="token keyword">create</span> timeseries root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>d1<span class="token punctuation">.</span>s1 <span class="token keyword">with</span> datatype<span class="token operator">=</span><span class="token keyword">BOOLEAN</span><span class="token punctuation">,</span>encoding<span class="token operator">=</span>PLAIN |
| Msg: The statement <span class="token operator">is</span> executed successfully<span class="token punctuation">.</span> |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> regions |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span>storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg<span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6667</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>ln<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6668</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0.013</span>s |
| |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> datanodes |
| <span class="token operator">+</span><span class="token comment">------+-------+---------+----+-------------+---------------+</span> |
| <span class="token operator">|</span>NodeID<span class="token operator">|</span> <span class="token keyword">Status</span><span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span>DataRegionNum<span class="token operator">|</span>SchemaRegionNum<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">------+-------+---------+----+-------------+---------------+</span> |
| <span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span>Running<span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6667</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span>Running<span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6668</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">------+-------+---------+----+-------------+---------------+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0.007</span>s |
| |
| IoTDB<span class="token operator">></span> <span class="token keyword">insert</span> <span class="token keyword">into</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>d1<span class="token punctuation">(</span><span class="token keyword">timestamp</span><span class="token punctuation">,</span>s1<span class="token punctuation">)</span> <span class="token keyword">values</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span><span class="token boolean">true</span><span class="token punctuation">)</span> |
| Msg: The statement <span class="token operator">is</span> executed successfully<span class="token punctuation">.</span> |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> regions |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span>RegionId<span class="token operator">|</span> <span class="token keyword">Type</span><span class="token operator">|</span><span class="token keyword">Status</span><span class="token operator">|</span>storage <span class="token keyword">group</span><span class="token operator">|</span>Series Slots<span class="token operator">|</span><span class="token keyword">Time</span> Slots<span class="token operator">|</span>DataNodeId<span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| <span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>sg<span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6667</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span>SchemaRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>ln<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6668</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span> DataRegion<span class="token operator">|</span> Up<span class="token operator">|</span> root<span class="token punctuation">.</span>ln<span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6667</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">--------+------------+------+-------------+------------+----------+----------+---------+----+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">3</span> |
| It costs <span class="token number">0.008</span>s |
| IoTDB<span class="token operator">></span> <span class="token keyword">show</span> datanodes |
| <span class="token operator">+</span><span class="token comment">------+-------+---------+----+-------------+---------------+</span> |
| <span class="token operator">|</span>NodeID<span class="token operator">|</span> <span class="token keyword">Status</span><span class="token operator">|</span> Host<span class="token operator">|</span>Port<span class="token operator">|</span>DataRegionNum<span class="token operator">|</span>SchemaRegionNum<span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">------+-------+---------+----+-------------+---------------+</span> |
| <span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span>Running<span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6667</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> |
| <span class="token operator">|</span> <span class="token number">2</span><span class="token operator">|</span>Running<span class="token operator">|</span><span class="token number">127.0</span><span class="token number">.0</span><span class="token number">.1</span><span class="token operator">|</span><span class="token number">6668</span><span class="token operator">|</span> <span class="token number">0</span><span class="token operator">|</span> <span class="token number">1</span><span class="token operator">|</span> |
| <span class="token operator">+</span><span class="token comment">------+-------+---------+----+-------------+---------------+</span> |
| Total line number <span class="token operator">=</span> <span class="token number">2</span> |
| It costs <span class="token number">0.006</span>s |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br></div></div><p>After a DataNode is stopped, its status will change, as shown below:</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>IoTDB> show datanodes |
| +------+-------+---------+----+-------------+---------------+ |
| |NodeID| Status| Host|Port|DataRegionNum|SchemaRegionNum| |
| +------+-------+---------+----+-------------+---------------+ |
| | 3|Running|127.0.0.1|6667| 0| 0| |
| | 4|Unknown|127.0.0.1|6669| 0| 0| |
| | 5|Running|127.0.0.1|6671| 0| 0| |
| +------+-------+---------+----+-------------+---------------+ |
| Total line number = 3 |
| It costs 0.009s |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br></div></div><h3 id="show-all-node-information"><a href="#show-all-node-information" class="header-anchor">#</a> Show all Node information</h3> <p>Currently, iotdb supports the following SQL to view the information of all nodes :</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW CLUSTER |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>Eg：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>IoTDB> show cluster |
| +------+----------+-------+---------+-----+ |
| |NodeID| NodeType| Status| Host| Port| |
| +------+----------+-------+---------+-----+ |
| | 0|ConfigNode|Running| 0.0.0.0|22277| |
| | 1|ConfigNode|Running| 0.0.0.0|22279| |
| | 2|ConfigNode|Running| 0.0.0.0|22281| |
| | 3| DataNode|Running|127.0.0.1| 9003| |
| | 4| DataNode|Running|127.0.0.1| 9005| |
| | 5| DataNode|Running|127.0.0.1| 9007| |
| +------+----------+-------+---------+-----+ |
| Total line number = 6 |
| It costs 0.011s |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br></div></div><p>After a node is stopped, its status will change, as shown below:</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>IoTDB> show cluster |
| +------+----------+-------+---------+-----+ |
| |NodeID| NodeType| Status| Host| Port| |
| +------+----------+-------+---------+-----+ |
| | 0|ConfigNode|Running| 0.0.0.0|22277| |
| | 1|ConfigNode|Unknown| 0.0.0.0|22279| |
| | 2|ConfigNode|Running| 0.0.0.0|22281| |
| | 3| DataNode|Running|127.0.0.1| 9003| |
| | 4| DataNode|Running|127.0.0.1| 9005| |
| | 5| DataNode|Running|127.0.0.1| 9007| |
| +------+----------+-------+---------+-----+ |
| Total line number = 6 |
| It costs 0.012s |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br></div></div></div> <div class="page-nav"><p class="inner"><span class="prev"> |
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