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active"><!----><span class="title">Cluster</span><span class="arrow down"></span></button><ul class="sidebar-links"><li><!--[--><a href="/UserGuide/V1.1.x/Cluster/Cluster-Concept.html" class="nav-link sidebar-link sidebar-page" aria-label="Cluster Concept"><!---->Cluster Concept<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Cluster/Cluster-Setup.html" class="nav-link sidebar-link sidebar-page" aria-label="Cluster Setup"><!---->Cluster Setup<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li><li><!--[--><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html" class="router-link-active router-link-exact-active nav-link active sidebar-link sidebar-page active" aria-label="Cluster Maintenance"><!---->Cluster Maintenance<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-variables" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Show Variables"><!---->Show Variables<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-confignode-information" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Show ConfigNode information"><!---->Show ConfigNode information<!----></a><ul class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#confignode-status-definition" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="ConfigNode status definition"><!---->ConfigNode status definition<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" 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class="sidebar-sub-headers"><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-the-dataregion-where-a-datapartition-resides-in" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Show the DataRegion where a DataPartition resides in"><!---->Show the DataRegion where a DataPartition resides in<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-the-schemaregion-where-a-schemapartition-resides-in" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Show the SchemaRegion where a SchemaPartition resides in"><!---->Show the SchemaRegion where a SchemaPartition resides in<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-the-time-slots-of-a-series-slot" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Show the time slots of a series slot"><!---->Show the time slots of a series slot<!----></a><ul class="sidebar-sub-headers"></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-database-s-series-slots" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Show Database's series slots"><!---->Show Database's series slots<!----></a><ul class="sidebar-sub-headers"></ul></li></ul></li><li class="sidebar-sub-header"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#migrate-region" class="router-link-active router-link-exact-active nav-link sidebar-link heading" aria-label="Migrate Region"><!---->Migrate Region<!----></a><ul class="sidebar-sub-headers"></ul></li></ul><!--]--></li><li><!--[--><a href="/UserGuide/V1.1.x/Cluster/Deployment-Recommendation.html" class="nav-link sidebar-link sidebar-page" aria-label="Deployment Recommendation"><!---->Deployment Recommendation<!----></a><ul class="sidebar-sub-headers"></ul><!--]--></li></ul></section></li><li><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">FAQ</span><span class="arrow end"></span></button><!----></section></li><li><section class="sidebar-group"><button class="sidebar-heading clickable"><!----><span class="title">Reference</span><span class="arrow end"></span></button><!----></section></li></ul><!--[--><!----><!--]--></aside><!--[--><main class="page" id="main-content"><!--[--><!----><nav class="breadcrumb disable"></nav><div class="page-title"><h1><!---->Cluster Information Query Command</h1><div class="page-info"><!----><!----><!----><!----><span class="page-reading-time-info" aria-label="Reading Time"><svg xmlns="http://www.w3.org/2000/svg" class="icon timer-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="timer icon"><path d="M799.387 122.15c4.402-2.978 7.38-7.897 7.38-13.463v-1.165c0-8.933-7.38-16.312-16.312-16.312H256.33c-8.933 0-16.311 7.38-16.311 16.312v1.165c0 5.825 2.977 10.874 7.637 13.592 4.143 194.44 97.22 354.963 220.201 392.763-122.204 37.542-214.893 196.511-220.2 389.397-4.661 5.049-7.638 11.651-7.638 19.03v5.825h566.49v-5.825c0-7.379-2.849-13.981-7.509-18.9-5.049-193.016-97.867-351.985-220.2-389.527 123.24-37.67 216.446-198.453 220.588-392.892zM531.16 450.445v352.632c117.674 1.553 211.787 40.778 211.787 88.676H304.097c0-48.286 95.149-87.382 213.728-88.676V450.445c-93.077-3.107-167.901-81.297-167.901-177.093 0-8.803 6.99-15.793 15.793-15.793 8.803 0 15.794 6.99 15.794 15.793 0 80.261 63.69 145.635 142.01 145.635s142.011-65.374 142.011-145.635c0-8.803 6.99-15.793 15.794-15.793s15.793 6.99 15.793 15.793c0 95.019-73.789 172.82-165.96 177.093z"></path></svg><span>About 12 min</span><meta property="timeRequired" content="PT12M"></span><!----><!----></div><hr></div><div class="toc-place-holder"><aside id="toc"><!--[--><!----><!--]--><div class="toc-header">On This Page<button class="print-button" title="Print"><svg xmlns="http://www.w3.org/2000/svg" class="icon print-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="print icon"><path d="M819.2 364.8h-44.8V128c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v236.8h-44.8C145.067 364.8 96 413.867 96 473.6v192c0 59.733 49.067 108.8 108.8 108.8h44.8V896c0 17.067 14.933 32 32 32h460.8c17.067 0 32-14.933 32-32V774.4h44.8c59.733 0 108.8-49.067 108.8-108.8v-192c0-59.733-49.067-108.8-108.8-108.8zM313.6 160h396.8v204.8H313.6V160zm396.8 704H313.6V620.8h396.8V864zM864 665.6c0 25.6-19.2 44.8-44.8 44.8h-44.8V588.8c0-17.067-14.933-32-32-32H281.6c-17.067 0-32 14.933-32 32v121.6h-44.8c-25.6 0-44.8-19.2-44.8-44.8v-192c0-25.6 19.2-44.8 44.8-44.8h614.4c25.6 0 44.8 19.2 44.8 44.8v192z"></path></svg></button></div><div class="toc-wrapper"><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-variables" class="router-link-active router-link-exact-active toc-link level2">Show Variables</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-confignode-information" class="router-link-active router-link-exact-active toc-link level2">Show ConfigNode information</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#confignode-status-definition" class="router-link-active router-link-exact-active toc-link level3">ConfigNode status definition</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-datanode-information" class="router-link-active router-link-exact-active toc-link level2">Show DataNode information</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#datanode-status-definition" class="router-link-active router-link-exact-active toc-link level3">DataNode status definition</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-all-node-information" class="router-link-active router-link-exact-active toc-link level2">Show all Node information</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-region-information" class="router-link-active router-link-exact-active toc-link level2">Show Region information</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#region-status-definition" class="router-link-active router-link-exact-active toc-link level3">Region status definition</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-cluster-slots-information" class="router-link-active router-link-exact-active toc-link level2">Show cluster slots information</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-the-dataregion-where-a-datapartition-resides-in" class="router-link-active router-link-exact-active toc-link level3">Show the DataRegion where a DataPartition resides in</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-the-schemaregion-where-a-schemapartition-resides-in" class="router-link-active router-link-exact-active toc-link level3">Show the SchemaRegion where a SchemaPartition resides in</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-the-time-slots-of-a-series-slot" class="router-link-active router-link-exact-active toc-link level3">Show the time slots of a series slot</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#show-database-s-series-slots" class="router-link-active router-link-exact-active toc-link level3">Show Database's series slots</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/UserGuide/V1.1.x/Cluster/Cluster-Maintenance.html#migrate-region" class="router-link-active router-link-exact-active toc-link level2">Migrate Region</a></li><!----><!--]--></ul></div><!--[--><!----><!--]--></aside></div><!----><div class="theme-hope-content"><!-- |
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| software distributed under the License is distributed on an |
| "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| KIND, either express or implied. See the License for the |
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| under the License. |
| |
| --><h1 id="cluster-information-query-command" tabindex="-1"><a class="header-anchor" href="#cluster-information-query-command" aria-hidden="true">#</a> Cluster Information Query Command</h1><h2 id="show-variables" tabindex="-1"><a class="header-anchor" href="#show-variables" aria-hidden="true">#</a> Show Variables</h2><p>Currently, IoTDB supports showing key parameters of the cluster:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>SHOW VARIABLES |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show variables |
| +----------------------------------+-----------------------------------------------------------------+ |
| | Variables| Value| |
| +----------------------------------+-----------------------------------------------------------------+ |
| | ClusterName| defaultCluster| |
| | DataReplicationFactor| 1| |
| | SchemaReplicationFactor| 1| |
| | DataRegionConsensusProtocolClass| org.apache.iotdb.consensus.iot.IoTConsensus| |
| |SchemaRegionConsensusProtocolClass| org.apache.iotdb.consensus.ratis.RatisConsensus| |
| | ConfigNodeConsensusProtocolClass| org.apache.iotdb.consensus.ratis.RatisConsensus| |
| | TimePartitionInterval| 604800000| |
| | DefaultTTL(ms)| 9223372036854775807| |
| | ReadConsistencyLevel| strong| |
| | SchemaRegionPerDataNode| 1.0| |
| | DataRegionPerDataNode| 5.0| |
| | LeastDataRegionGroupNum| 5| |
| | SeriesSlotNum| 10000| |
| | SeriesSlotExecutorClass|org.apache.iotdb.commons.partition.executor.hash.BKDRHashExecutor| |
| | DiskSpaceWarningThreshold| 0.05| |
| +----------------------------------+-----------------------------------------------------------------+ |
| Total line number = 15 |
| It costs 0.225s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p><strong>Notice:</strong> Ensure that all key parameters displayed in this SQL are consist on each node in the same cluster</p><h2 id="show-confignode-information" tabindex="-1"><a class="header-anchor" href="#show-confignode-information" aria-hidden="true">#</a> Show ConfigNode information</h2><p>Currently, IoTDB supports showing ConfigNode information by the following SQL:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>SHOW CONFIGNODES |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show confignodes |
| +------+-------+---------------+------------+--------+ |
| |NodeID| Status|InternalAddress|InternalPort| Role| |
| +------+-------+---------------+------------+--------+ |
| | 0|Running| 127.0.0.1| 10710| Leader| |
| | 1|Running| 127.0.0.1| 10711|Follower| |
| | 2|Running| 127.0.0.1| 10712|Follower| |
| +------+-------+---------------+------------+--------+ |
| Total line number = 3 |
| It costs 0.030s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="confignode-status-definition" tabindex="-1"><a class="header-anchor" href="#confignode-status-definition" aria-hidden="true">#</a> ConfigNode status definition</h3><p>The ConfigNode statuses are defined as follows:</p><ul><li><strong>Running</strong>: The ConfigNode is running properly.</li><li><strong>Unknown</strong>: The ConfigNode doesn't report heartbeat properly. <ul><li>Can't receive data synchronized from other ConfigNodes</li><li>Won't be selected as the cluster ConfigNode-leader</li></ul></li></ul><h2 id="show-datanode-information" tabindex="-1"><a class="header-anchor" href="#show-datanode-information" aria-hidden="true">#</a> Show DataNode information</h2><p>Currently, IoTDB supports showing DataNode information by the following SQL:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>SHOW DATANODES |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> create timeseries root.sg.d1.s1 with datatype=BOOLEAN,encoding=PLAIN |
| Msg: The statement is executed successfully. |
| IoTDB> create timeseries root.sg.d2.s1 with datatype=BOOLEAN,encoding=PLAIN |
| Msg: The statement is executed successfully. |
| IoTDB> create timeseries root.ln.d1.s1 with datatype=BOOLEAN,encoding=PLAIN |
| Msg: The statement is executed successfully. |
| IoTDB> show datanodes |
| +------+-------+----------+-------+-------------+---------------+ |
| |NodeID| Status|RpcAddress|RpcPort|DataRegionNum|SchemaRegionNum| |
| +------+-------+----------+-------+-------------+---------------+ |
| | 1|Running| 127.0.0.1| 6667| 0| 1| |
| | 2|Running| 127.0.0.1| 6668| 0| 1| |
| +------+-------+----------+-------+-------------+---------------+ |
| Total line number = 2 |
| It costs 0.007s |
| |
| IoTDB> insert into root.ln.d1(timestamp,s1) values(1,true) |
| Msg: The statement is executed successfully. |
| IoTDB> show datanodes |
| +------+-------+----------+-------+-------------+---------------+ |
| |NodeID| Status|RpcAddress|RpcPort|DataRegionNum|SchemaRegionNum| |
| +------+-------+----------+-------+-------------+---------------+ |
| | 1|Running| 127.0.0.1| 6667| 1| 1| |
| | 2|Running| 127.0.0.1| 6668| 0| 1| |
| +------+-------+----------+-------+-------------+---------------+ |
| Total line number = 2 |
| It costs 0.006s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="datanode-status-definition" tabindex="-1"><a class="header-anchor" href="#datanode-status-definition" aria-hidden="true">#</a> DataNode status definition</h3><p>The state machine of DataNode is shown in the figure below: <img style="width:100%;max-width:500px;max-height:500px;margin-left:auto;margin-right:auto;display:block;" src="https://alioss.timecho.com/docs/img/UserGuide/Cluster/DataNode-StateMachine-EN.jpg"></p><p>The DataNode statuses are defined as follows:</p><ul><li><strong>Running</strong>: The DataNode is running properly and is readable and writable.</li><li><strong>Unknown</strong>: The DataNode doesn't report heartbeat properly, the ConfigNode considers the DataNode as unreadable and un-writable. <ul><li>The cluster is still readable and writable if some DataNodes are Unknown</li></ul></li><li><strong>Removing</strong>: The DataNode is being removed from the cluster and is unreadable and un-writable. <ul><li>The cluster is still readable and writable if some DataNodes are Removing</li></ul></li><li><strong>ReadOnly</strong>: The remaining disk space of DataNode is lower than disk_warning_threshold(default is 5%), the DataNode is readable but un-writable and cannot synchronize data. <ul><li>The cluster is still readable and writable if some DataNodes are ReadOnly</li><li>The schema and data in a ReadOnly DataNode is readable</li><li>The schema and data in a ReadOnly DataNode is deletable</li><li>A ReadOnly DataNode is creatable for schema, but un-writable for data</li><li>Data cannot be written to the cluster when all DataNodes are ReadOnly, but new Databases and schema is still creatable</li></ul></li></ul><p><strong>For a DataNode</strong>, the following table describes the impact of schema read, write, and deletion in different status:</p><table><thead><tr><th>DataNode status</th><th>readable</th><th>creatable</th><th>deletable</th></tr></thead><tbody><tr><td>Running</td><td>yes</td><td>yes</td><td>yes</td></tr><tr><td>Unknown</td><td>no</td><td>no</td><td>no</td></tr><tr><td>Removing</td><td>no</td><td>no</td><td>no</td></tr><tr><td>ReadOnly</td><td>yes</td><td>yes</td><td>yes</td></tr></tbody></table><p><strong>For a DataNode</strong>, the following table describes the impact of data read, write, and deletion in different status:</p><table><thead><tr><th>DataNode status</th><th>readable</th><th>writable</th><th>deletable</th></tr></thead><tbody><tr><td>Running</td><td>yes</td><td>yes</td><td>yes</td></tr><tr><td>Unknown</td><td>no</td><td>no</td><td>no</td></tr><tr><td>Removing</td><td>no</td><td>no</td><td>no</td></tr><tr><td>ReadOnly</td><td>yes</td><td>no</td><td>yes</td></tr></tbody></table><h2 id="show-all-node-information" tabindex="-1"><a class="header-anchor" href="#show-all-node-information" aria-hidden="true">#</a> Show all Node information</h2><p>Currently, IoTDB supports show the information of all Nodes by the following SQL:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>SHOW CLUSTER |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show cluster |
| +------+----------+-------+---------------+------------+ |
| |NodeID| NodeType| Status|InternalAddress|InternalPort| |
| +------+----------+-------+---------------+------------+ |
| | 0|ConfigNode|Running| 127.0.0.1| 10710| |
| | 1|ConfigNode|Running| 127.0.0.1| 10711| |
| | 2|ConfigNode|Running| 127.0.0.1| 10712| |
| | 3| DataNode|Running| 127.0.0.1| 10730| |
| | 4| DataNode|Running| 127.0.0.1| 10731| |
| | 5| DataNode|Running| 127.0.0.1| 10732| |
| +------+----------+-------+---------------+------------+ |
| Total line number = 6 |
| It costs 0.011s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>After a node is stopped, its status will change, as shown below:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show cluster |
| +------+----------+-------+---------------+------------+ |
| |NodeID| NodeType| Status|InternalAddress|InternalPort| |
| +------+----------+-------+---------------+------------+ |
| | 0|ConfigNode|Running| 127.0.0.1| 10710| |
| | 1|ConfigNode|Unknown| 127.0.0.1| 10711| |
| | 2|ConfigNode|Running| 127.0.0.1| 10712| |
| | 3| DataNode|Running| 127.0.0.1| 10730| |
| | 4| DataNode|Running| 127.0.0.1| 10731| |
| | 5| DataNode|Running| 127.0.0.1| 10732| |
| +------+----------+-------+---------------+------------+ |
| Total line number = 6 |
| It costs 0.012s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Show the details of all nodes:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>SHOW CLUSTER DETAILS |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show cluster details |
| +------+----------+-------+---------------+------------+-------------------+----------+-------+-------+-------------------+-----------------+ |
| |NodeID| NodeType| Status|InternalAddress|InternalPort|ConfigConsensusPort|RpcAddress|RpcPort|MppPort|SchemaConsensusPort|DataConsensusPort| |
| +------+----------+-------+---------------+------------+-------------------+----------+-------+-------+-------------------+-----------------+ |
| | 0|ConfigNode|Running| 127.0.0.1| 10710| 10720| | | | | | |
| | 1|ConfigNode|Running| 127.0.0.1| 10711| 10721| | | | | | |
| | 2|ConfigNode|Running| 127.0.0.1| 10712| 10722| | | | | | |
| | 3| DataNode|Running| 127.0.0.1| 10730| | 127.0.0.1| 6667| 10740| 10750| 10760| |
| | 4| DataNode|Running| 127.0.0.1| 10731| | 127.0.0.1| 6668| 10741| 10751| 10761| |
| | 5| DataNode|Running| 127.0.0.1| 10732| | 127.0.0.1| 6669| 10742| 10752| 10762| |
| +------+----------+-------+---------------+------------+-------------------+----------+-------+-------+-------------------+-----------------+ |
| Total line number = 6 |
| It costs 0.340s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="show-region-information" tabindex="-1"><a class="header-anchor" href="#show-region-information" aria-hidden="true">#</a> Show Region information</h2><p>The cluster uses a SchemaRegion/DataRegion as a unit for schema/data replication and data management. The Region status and distribution is helpful for system operation and maintenance testing, as shown in the following scenarios:</p><ul><li>Check which DataNodes are allocated to each Region in the cluster and whether they are balanced.</li><li>Check the partitions allocated to each Region in the cluster and whether they are balanced.</li><li>Check which DataNodes are allocated by the leaders of each RegionGroup in the cluster and whether they are balanced.</li></ul><p>Currently, IoTDB supports show Region information by the following SQL:</p><ul><li><code>SHOW REGIONS</code>: Show distribution of all Regions.</li><li><code>SHOW SCHEMA REGIONS</code>: Show distribution of all SchemaRegions.</li><li><code>SHOW DATA REGIONS</code>: Show distribution of all DataRegions.</li><li><code>SHOW (DATA|SCHEMA)? REGIONS OF DATABASE <sg1,sg2,...></code>: Show Region distribution of specified StorageGroups.</li><li><code>SHOW (DATA|SCHEMA)? REGIONS ON NODEID <id1,id2,...></code>: Show Region distribution on specified Nodes.</li><li><code>SHOW (DATA|SCHEMA)? REGIONS (OF DATABASE <sg1,sg2,...>)? (ON NODEID <id1,id2,...>)?</code>: Show Region distribution of specified StorageGroups on specified Nodes.</li></ul><p>Show distribution of all Regions:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show regions |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 0| DataRegion|Running|root.sg1| 1| 1| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.520| |
| | 0| DataRegion|Running|root.sg1| 1| 1| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:18.749| |
| | 0| DataRegion|Running|root.sg1| 1| 1| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:19.013| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.111| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:18.245| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 3| 127.0.0.1| 6669| Leader|2023-03-07T17:32:18.398| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 1| 127.0.0.1| 6667| Leader|2023-03-07T17:32:19.834| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:20.011| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:20.395| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:19.232| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:19.450| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:19.637| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 12 |
| It costs 0.165s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>The SeriesSlotNum refers to the number of the seriesSlots in the region. In the same light, the TimeSlotNum means the number of the timeSlots in the region.</p><p>Show the distribution of SchemaRegions or DataRegions:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show data regions |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 0| DataRegion|Running|root.sg1| 1| 1| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.520| |
| | 0| DataRegion|Running|root.sg1| 1| 1| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:18.749| |
| | 0| DataRegion|Running|root.sg1| 1| 1| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:19.013| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 1| 127.0.0.1| 6667| Leader|2023-03-07T17:32:19.834| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:20.011| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:20.395| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 6 |
| It costs 0.011s |
| |
| IoTDB> show schema regions |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.111| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:18.245| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 3| 127.0.0.1| 6669| Leader|2023-03-07T17:32:18.398| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:19.232| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:19.450| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:19.637| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 6 |
| It costs 0.012s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Show Region distribution of specified DataBases:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show regions of database root.sg1 |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+------------+-------+-- -----+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 0| DataRegion|Running|root.sg1| 1| 1| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.520| |
| | 0| DataRegion|Running|root.sg1| 1| 1| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:18.749| |
| | 0| DataRegion|Running|root.sg1| 1| 1| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:19.013| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.111| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:18.245| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 3| 127.0.0.1| 6669| Leader|2023-03-07T17:32:18.398| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 6 |
| It costs 0.007s |
| |
| IoTDB> show regions of database root.sg1, root.sg2 |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 0| DataRegion|Running|root.sg1| 1| 1| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.520| |
| | 0| DataRegion|Running|root.sg1| 1| 1| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:18.749| |
| | 0| DataRegion|Running|root.sg1| 1| 1| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:19.013| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.111| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:18.245| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 3| 127.0.0.1| 6669| Leader|2023-03-07T17:32:18.398| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 1| 127.0.0.1| 6667| Leader|2023-03-07T17:32:19.834| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:20.011| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:20.395| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:19.232| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:19.450| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:19.637| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 12 |
| It costs 0.009s |
| |
| IoTDB> show data regions of database root.sg1, root.sg2 |
| +--------+----------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+----------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 0|DataRegion|Running|root.sg1| 1| 1| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.520| |
| | 0|DataRegion|Running|root.sg1| 1| 1| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:18.749| |
| | 0|DataRegion|Running|root.sg1| 1| 1| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:19.013| |
| | 2|DataRegion|Running|root.sg2| 1| 1| 1| 127.0.0.1| 6667| Leader|2023-03-07T17:32:19.834| |
| | 2|DataRegion|Running|root.sg2| 1| 1| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:20.011| |
| | 2|DataRegion|Running|root.sg2| 1| 1| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:20.395| |
| +--------+----------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 6 |
| It costs 0.007s |
| |
| IoTDB> show schema regions of database root.sg1, root.sg2 |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.111| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:18.245| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 3| 127.0.0.1| 6669| Leader|2023-03-07T17:32:18.398| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:19.232| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:19.450| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 3| 127.0.0.1| 6669|Follower|2023-03-07T17:32:19.637| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 6 |
| It costs 0.009s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Show Region distribution on specified Nodes:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show regions on nodeid 1 |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 0| DataRegion|Running|root.sg1| 1| 1| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.520| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.111| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 1| 127.0.0.1| 6667| Leader|2023-03-07T17:32:19.834| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:19.232| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 4 |
| It costs 0.165s |
| |
| IoTDB> show regions on nodeid 1, 2 |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 0| DataRegion|Running|root.sg1| 1| 1| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.520| |
| | 0| DataRegion|Running|root.sg1| 1| 1| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:18.749| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.111| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:18.245| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 1| 127.0.0.1| 6667| Leader|2023-03-07T17:32:19.834| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:19.011| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:19.232| |
| | 3|SchemaRegion|Running|root.sg2| 1| 0| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:19.450| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 8 |
| It costs 0.165s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><p>Show Region distribution of specified StorageGroups on specified Nodes：</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show regions of database root.sg1 on nodeid 1 |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 0| DataRegion|Running|root.sg1| 1| 1| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.520| |
| | 1|SchemaRegion|Running|root.sg1| 1| 0| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.111| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 2 |
| It costs 0.165s |
| |
| IoTDB> show data regions of database root.sg1, root.sg2 on nodeid 1, 2 |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| |RegionId| Type| Status|Database|SeriesSlotNum|TimeSlotNum|DataNodeId|RpcAddress|RpcPort| Role| CreateTime| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| | 0| DataRegion|Running|root.sg1| 1| 1| 1| 127.0.0.1| 6667|Follower|2023-03-07T17:32:18.520| |
| | 0| DataRegion|Running|root.sg1| 1| 1| 2| 127.0.0.1| 6668| Leader|2023-03-07T17:32:18.749| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 1| 127.0.0.1| 6667| Leader|2023-03-07T17:32:19.834| |
| | 2| DataRegion|Running|root.sg2| 1| 1| 2| 127.0.0.1| 6668|Follower|2023-03-07T17:32:19.011| |
| +--------+------------+-------+--------+-------------+-----------+----------+----------+-------+--------+-----------------------+ |
| Total line number = 4 |
| It costs 0.165s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="region-status-definition" tabindex="-1"><a class="header-anchor" href="#region-status-definition" aria-hidden="true">#</a> Region status definition</h3><p>Region inherits the status of the DataNode where the Region resides. And Region states are defined as follows:</p><ul><li><strong>Running</strong>: The DataNode where the Region resides is running properly, the Region is readable and writable.</li><li><strong>Unknown</strong>: The DataNode where the Region resides doesn't report heartbeat properly, the ConfigNode considers the Region is unreadable and un-writable.</li><li><strong>Removing</strong>: The DataNode where the Region resides is being removed from the cluster, the Region is unreadable and un-writable.</li><li><strong>ReadOnly</strong>: The available disk space of the DataNode where the Region resides is lower than the disk_warning_threshold(5% by default). The Region is readable but un-writable and cannot synchronize data.</li></ul><p><strong>The status switchover of a Region doesn't affect the belonged RegionGroup</strong>, when setting up a multi-replica cluster(i.e. the number of schema replica and data replica is greater than 1), other Running Regions of the same RegionGroup ensure the high availability of RegionGroup.</p><p><strong>For a RegionGroup:</strong></p><ul><li>It's readable, writable and deletable if and only if more than half of its Regions are Running</li><li>It's unreadable, un-writable and un-deletable when the number of its Running Regions is less than half</li></ul><h2 id="show-cluster-slots-information" tabindex="-1"><a class="header-anchor" href="#show-cluster-slots-information" aria-hidden="true">#</a> Show cluster slots information</h2><p>The cluster uses partitions for schema and data arrangement, the partition defined as follows:</p><ul><li><code>SchemaPartition</code>: SeriesSlot</li><li><code>DataPartition</code>: <SeriesSlot, SeriesTimeSlot></li></ul><p>More details can be found in the <a href="/UserGuide/V1.1.x/Cluster/Cluster-Concept.html" class="">Cluster-Concept</a> document.</p><p>The cluster slots information can be shown by the following SQLs:</p><h3 id="show-the-dataregion-where-a-datapartition-resides-in" tabindex="-1"><a class="header-anchor" href="#show-the-dataregion-where-a-datapartition-resides-in" aria-hidden="true">#</a> Show the DataRegion where a DataPartition resides in</h3><p>Show the DataRegion where a DataPartition(or all DataPartitions under a same series slot) resides in:</p><ul><li><code>SHOW DATA REGIONID OF root.sg WHERE SERIESSLOTID=s0 (AND TIMESLOTID=t0)</code></li></ul><p>Specifications:</p><ol><li><p>The s0, t0 must be numbers.</p></li><li><p>The "TimeSlotId" is short for "SeriesTimeSlotId".</p></li><li><p>The "SERIESSLOTID=s0" can be substituted by "DEVICEID=xxx.xx.xx". Using this, the sql will calculate the seriesSlot corresponding to that deviceId.</p></li><li><p>The "TIMESLOTID=t0" can be replaced by "TIMESTAMP=t1". In this case, the sql will calculate the timeSlot the timestamp belongs to, which starts before the timeStamp and (implicitly) ends after it.</p></li></ol><p>Eg:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show data regionid of root.sg where seriesslotid=5286 and timeslotid=0 |
| +--------+ |
| |RegionId| |
| +--------+ |
| | 1| |
| +--------+ |
| Total line number = 1 |
| It costs 0.006s |
| |
| IoTDB> show data regionid of root.sg where seriesslotid=5286 |
| +--------+ |
| |RegionId| |
| +--------+ |
| | 1| |
| | 2| |
| +--------+ |
| Total line number = 2 |
| It costs 0.006s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="show-the-schemaregion-where-a-schemapartition-resides-in" tabindex="-1"><a class="header-anchor" href="#show-the-schemaregion-where-a-schemapartition-resides-in" aria-hidden="true">#</a> Show the SchemaRegion where a SchemaPartition resides in</h3><p>Show the SchemaRegion where a SchemaPartition resides in:</p><ul><li><code>SHOW SCHEMA REGIONID OF root.sg WHERE SERIESSLOTID=s0</code></li></ul><p>As is illustrated above, the SeriesSlotID and TimeSlotID are both replaceable.</p><p>Eg:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show schema regionid of root.sg where seriesslotid=5286 |
| +--------+ |
| |RegionId| |
| +--------+ |
| | 0| |
| +--------+ |
| Total line number = 1 |
| It costs 0.007s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="show-the-time-slots-of-a-series-slot" tabindex="-1"><a class="header-anchor" href="#show-the-time-slots-of-a-series-slot" aria-hidden="true">#</a> Show the time slots of a series slot</h3><p>Show the time slots under a particular series slot.</p><ul><li><code>SHOW TIMESLOTID OF root.sg WHERE SERIESLOTID=s0 (AND STARTTIME=t1) (AND ENDTIME=t2)</code></li></ul><p>Eg:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show timeslotid of root.sg where seriesslotid=5286 |
| +----------+ |
| |TimeSlotId| |
| +----------+ |
| | 0| |
| | 1000| |
| +----------+ |
| Total line number = 1 |
| It costs 0.007s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="show-database-s-series-slots" tabindex="-1"><a class="header-anchor" href="#show-database-s-series-slots" aria-hidden="true">#</a> Show Database's series slots</h3><p>Show the data/schema/all series slots related to a database:</p><ul><li><code>SHOW (DATA|SCHEMA)? SERIESSLOTID OF root.sg</code></li></ul><p>Eg:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show data seriesslotid of root.sg |
| +------------+ |
| |SeriesSlotId| |
| +------------+ |
| | 5286| |
| +------------+ |
| Total line number = 1 |
| It costs 0.007s |
| |
| IoTDB> show schema seriesslotid of root.sg |
| +------------+ |
| |SeriesSlotId| |
| +------------+ |
| | 5286| |
| +------------+ |
| Total line number = 1 |
| It costs 0.006s |
| |
| IoTDB> show seriesslotid of root.sg |
| +------------+ |
| |SeriesSlotId| |
| +------------+ |
| | 5286| |
| +------------+ |
| Total line number = 1 |
| It costs 0.006s |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h2 id="migrate-region" tabindex="-1"><a class="header-anchor" href="#migrate-region" aria-hidden="true">#</a> Migrate Region</h2><p>The following sql can be applied to manually migrate a region, for load balancing or other purposes.</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>MIGRATE REGION <Region-id> FROM <original-DataNodeId> TO <dest-DataNodeId> |
| </code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div></div></div><p>Eg:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> SHOW REGIONS |
| +--------+------------+-------+-------------+------------+----------+----------+----------+-------+--------+ |
| |RegionId| Type| Status| Database|SeriesSlotId|TimeSlotId|DataNodeId|RpcAddress|RpcPort| Role| |
| +--------+------------+-------+-------------+------------+----------+----------+----------+-------+--------+ |
| | 0|SchemaRegion|Running|root.test.g_0| 500| 0| 3| 127.0.0.1| 6670| Leader| |
| | 0|SchemaRegion|Running|root.test.g_0| 500| 0| 4| 127.0.0.1| 6681|Follower| |
| | 0|SchemaRegion|Running|root.test.g_0| 500| 0| 5| 127.0.0.1| 6668|Follower| |
| | 1| DataRegion|Running|root.test.g_0| 183| 200| 1| 127.0.0.1| 6667|Follower| |
| | 1| DataRegion|Running|root.test.g_0| 183| 200| 3| 127.0.0.1| 6670|Follower| |
| | 1| DataRegion|Running|root.test.g_0| 183| 200| 7| 127.0.0.1| 6669| Leader| |
| | 2| DataRegion|Running|root.test.g_0| 181| 200| 3| 127.0.0.1| 6670| Leader| |
| | 2| DataRegion|Running|root.test.g_0| 181| 200| 4| 127.0.0.1| 6681|Follower| |
| | 2| DataRegion|Running|root.test.g_0| 181| 200| 5| 127.0.0.1| 6668|Follower| |
| | 3| DataRegion|Running|root.test.g_0| 180| 200| 1| 127.0.0.1| 6667|Follower| |
| | 3| DataRegion|Running|root.test.g_0| 180| 200| 5| 127.0.0.1| 6668| Leader| |
| | 3| DataRegion|Running|root.test.g_0| 180| 200| 7| 127.0.0.1| 6669|Follower| |
| | 4| DataRegion|Running|root.test.g_0| 179| 200| 3| 127.0.0.1| 6670|Follower| |
| | 4| DataRegion|Running|root.test.g_0| 179| 200| 4| 127.0.0.1| 6681| Leader| |
| | 4| DataRegion|Running|root.test.g_0| 179| 200| 7| 127.0.0.1| 6669|Follower| |
| | 5| DataRegion|Running|root.test.g_0| 179| 200| 1| 127.0.0.1| 6667| Leader| |
| | 5| DataRegion|Running|root.test.g_0| 179| 200| 4| 127.0.0.1| 6681|Follower| |
| | 5| DataRegion|Running|root.test.g_0| 179| 200| 5| 127.0.0.1| 6668|Follower| |
| +--------+------------+-------+-------------+------------+----------+----------+----------+-------+--------+ |
| Total line number = 18 |
| It costs 0.161s |
| |
| IoTDB> MIGRATE REGION 1 FROM 3 TO 4 |
| Msg: The statement is executed successfully. |
| |
| IoTDB> SHOW REGIONS |
| +--------+------------+-------+-------------+------------+----------+----------+----------+-------+--------+ |
| |RegionId| Type| Status| Database|SeriesSlotId|TimeSlotId|DataNodeId|RpcAddress|RpcPort| Role| |
| +--------+------------+-------+-------------+------------+----------+----------+----------+-------+--------+ |
| | 0|SchemaRegion|Running|root.test.g_0| 500| 0| 3| 127.0.0.1| 6670| Leader| |
| | 0|SchemaRegion|Running|root.test.g_0| 500| 0| 4| 127.0.0.1| 6681|Follower| |
| | 0|SchemaRegion|Running|root.test.g_0| 500| 0| 5| 127.0.0.1| 6668|Follower| |
| | 1| DataRegion|Running|root.test.g_0| 183| 200| 1| 127.0.0.1| 6667|Follower| |
| | 1| DataRegion|Running|root.test.g_0| 183| 200| 4| 127.0.0.1| 6681|Follower| |
| | 1| DataRegion|Running|root.test.g_0| 183| 200| 7| 127.0.0.1| 6669| Leader| |
| | 2| DataRegion|Running|root.test.g_0| 181| 200| 3| 127.0.0.1| 6670| Leader| |
| | 2| DataRegion|Running|root.test.g_0| 181| 200| 4| 127.0.0.1| 6681|Follower| |
| | 2| DataRegion|Running|root.test.g_0| 181| 200| 5| 127.0.0.1| 6668|Follower| |
| | 3| DataRegion|Running|root.test.g_0| 180| 200| 1| 127.0.0.1| 6667|Follower| |
| | 3| DataRegion|Running|root.test.g_0| 180| 200| 5| 127.0.0.1| 6668| Leader| |
| | 3| DataRegion|Running|root.test.g_0| 180| 200| 7| 127.0.0.1| 6669|Follower| |
| | 4| DataRegion|Running|root.test.g_0| 179| 200| 3| 127.0.0.1| 6670|Follower| |
| | 4| DataRegion|Running|root.test.g_0| 179| 200| 4| 127.0.0.1| 6681| Leader| |
| | 4| DataRegion|Running|root.test.g_0| 179| 200| 7| 127.0.0.1| 6669|Follower| |
| | 5| DataRegion|Running|root.test.g_0| 179| 200| 1| 127.0.0.1| 6667| Leader| |
| | 5| DataRegion|Running|root.test.g_0| 179| 200| 4| 127.0.0.1| 6681|Follower| |
| | 5| DataRegion|Running|root.test.g_0| 179| 200| 5| 127.0.0.1| 6668|Follower| |
| +--------+------------+-------+-------------+------------+----------+----------+----------+-------+--------+ |
| Total line number = 18 |
| It costs 0.165s |
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