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level2">集群运维命令</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.2.x/Cluster/Cluster-Maintenance.html#展示集群配置" class="router-link-active router-link-exact-active toc-link level3">展示集群配置</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.2.x/Cluster/Cluster-Maintenance.html#展示-confignode-信息" class="router-link-active router-link-exact-active toc-link level3">展示 ConfigNode 信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.2.x/Cluster/Cluster-Maintenance.html#展示-datanode-信息" class="router-link-active router-link-exact-active toc-link level3">展示 DataNode 信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.2.x/Cluster/Cluster-Maintenance.html#展示全部节点信息" class="router-link-active router-link-exact-active toc-link level3">展示全部节点信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a 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| --><h2 id="集群运维命令" tabindex="-1"><a class="header-anchor" href="#集群运维命令" aria-hidden="true">#</a> 集群运维命令</h2><h3 id="展示集群配置" tabindex="-1"><a class="header-anchor" href="#展示集群配置" aria-hidden="true">#</a> 展示集群配置</h3><p>当前 IoTDB 支持使用如下 SQL 展示集群的关键参数：</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>示例：</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>注意：</strong> 必须保证该 SQL 展示的所有配置参数在同一集群各个节点完全一致</p><h3 id="展示-confignode-信息" tabindex="-1"><a class="header-anchor" href="#展示-confignode-信息" aria-hidden="true">#</a> 展示 ConfigNode 信息</h3><p>当前 IoTDB 支持使用如下 SQL 展示 ConfigNode 的信息：</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>示例：</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><h4 id="confignode-状态定义" tabindex="-1"><a class="header-anchor" href="#confignode-状态定义" aria-hidden="true">#</a> ConfigNode 状态定义</h4><p>对 ConfigNode 各状态定义如下：</p><ul><li><strong>Running</strong>: ConfigNode 正常运行</li><li><strong>Unknown</strong>: ConfigNode 未正常上报心跳 <ul><li>无法接收其它 ConfigNode 同步来的数据</li><li>不会被选为集群的 ConfigNode-leader</li></ul></li></ul><h3 id="展示-datanode-信息" tabindex="-1"><a class="header-anchor" href="#展示-datanode-信息" aria-hidden="true">#</a> 展示 DataNode 信息</h3><p>当前 IoTDB 支持使用如下 SQL 展示 DataNode 的信息：</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>示例：</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 class="line-number"></div></div></div><h4 id="datanode-状态定义" tabindex="-1"><a class="header-anchor" href="#datanode-状态定义" aria-hidden="true">#</a> DataNode 状态定义</h4><p>DataNode 的状态机如下图所示： <img style="width:100%;max-width:500px;max-height:500px;margin-left:auto;margin-right:auto;display:block;" src="https://gitbox.apache.org/repos/asf?p=iotdb-bin-resources.git;a=blob_plain;f=docs/UserGuide/Cluster/DataNode-StateMachine-ZH.jpg"></p><p>对 DataNode 各状态定义如下：</p><ul><li><strong>Running</strong>: DataNode 正常运行，可读可写</li><li><strong>Unknown</strong>: DataNode 未正常上报心跳，ConfigNode 认为该 DataNode 不可读写 <ul><li>少数 Unknown DataNode 不影响集群读写</li></ul></li><li><strong>Removing</strong>: DataNode 正在移出集群，不可读写 <ul><li>少数 Removing DataNode 不影响集群读写</li></ul></li><li><strong>ReadOnly</strong>: DataNode 磁盘剩余空间低于 disk_warning_threshold（默认 5%），DataNode 可读但不能写入，不能同步数据 <ul><li>少数 ReadOnly DataNode 不影响集群读写</li><li>ReadOnly DataNode 可以查询元数据和数据</li><li>ReadOnly DataNode 可以删除元数据和数据</li><li>ReadOnly DataNode 可以创建元数据，不能写入数据</li><li>所有 DataNode 处于 ReadOnly 状态时，集群不能写入数据，仍可以创建 Database 和元数据</li></ul></li></ul><p><strong>对于一个 DataNode</strong>，不同状态元数据查询、创建、删除的影响如下表所示：</p><table><thead><tr><th>DataNode 状态</th><th>可读</th><th>可创建</th><th>可删除</th></tr></thead><tbody><tr><td>Running</td><td>是</td><td>是</td><td>是</td></tr><tr><td>Unknown</td><td>否</td><td>否</td><td>否</td></tr><tr><td>Removing</td><td>否</td><td>否</td><td>否</td></tr><tr><td>ReadOnly</td><td>是</td><td>是</td><td>是</td></tr></tbody></table><p><strong>对于一个 DataNode</strong>，不同状态数据查询、写入、删除的影响如下表所示：</p><table><thead><tr><th>DataNode 状态</th><th>可读</th><th>可写</th><th>可删除</th></tr></thead><tbody><tr><td>Running</td><td>是</td><td>是</td><td>是</td></tr><tr><td>Unknown</td><td>否</td><td>否</td><td>否</td></tr><tr><td>Removing</td><td>否</td><td>否</td><td>否</td></tr><tr><td>ReadOnly</td><td>是</td><td>否</td><td>是</td></tr></tbody></table><h3 id="展示全部节点信息" tabindex="-1"><a class="header-anchor" href="#展示全部节点信息" aria-hidden="true">#</a> 展示全部节点信息</h3><p>当前 IoTDB 支持使用如下 SQL 展示全部节点的信息：</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>示例：</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>在节点被关停后，它的状态也会改变，如下所示：</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>展示全部节点的详细配置信息：</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>示例：</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><h3 id="展示-region-信息" tabindex="-1"><a class="header-anchor" href="#展示-region-信息" aria-hidden="true">#</a> 展示 Region 信息</h3><p>集群中以 SchemaRegion/DataRegion 作为元数据/数据的复制和管理单元，Region 的状态和分布对于系统运维和测试有很大帮助，如以下场景：</p><ul><li>查看集群中各个 Region 被分配到了哪些 DataNode，是否均衡</li><li>查看集群中各个 Region 被分配了哪些分区，是否均衡</li><li>查看集群中各个 RegionGroup 的 leader 被分配到了哪些 DataNode，是否均衡</li></ul><p>当前 IoTDB 支持使用如下 SQL 展示 Region 信息：</p><ul><li><code>SHOW REGIONS</code>: 展示所有 Region 分布</li><li><code>SHOW SCHEMA REGIONS</code>: 展示所有 SchemaRegion 分布</li><li><code>SHOW DATA REGIONS</code>: 展示所有 DataRegion 分布</li><li><code>SHOW (DATA|SCHEMA)? REGIONS OF DATABASE <sg1,sg2,...></code>: 展示指定数据库 <sg1,sg2,...> 对应的 Region 分布</li><li><code>SHOW (DATA|SCHEMA)? REGIONS ON NODEID <id1,id2,...></code>: 展示指定节点 <id1,id2,...> 对应的 Region 分布</li><li><code>SHOW (DATA|SCHEMA)? REGIONS (OF DATABASE <sg1,sg2,...>)? (ON NODEID <id1,id2,...>)?</code>: 展示指定数据库 <sg1,sg2,...> 在指定节点 <id1,id2,...> 对应的 Region 分布</li></ul><p>展示所有 Region 的分布：</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>其中，SeriesSlotNum 指的是 region 内 seriesSlot 的个数。同样地，TimeSlotNum 也指 region 内 timeSlot 的个数。</p><p>展示 SchemaRegion 或 DataRegion 的分布：</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>展示指定数据库 <sg1,sg2,...> 对应的 Region 分布：</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>展示指定节点 <id1,id2,...> 对应的 Region 分布：</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>展示指定数据库 <sg1,sg2,...> 在指定节点 <id1,id2,...> 对应的 Region 分布：</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><h4 id="region-状态定义" tabindex="-1"><a class="header-anchor" href="#region-状态定义" aria-hidden="true">#</a> Region 状态定义</h4><p>Region 继承所在 DataNode 的状态，对 Region 各状态定义如下：</p><ul><li><strong>Running</strong>: Region 所在 DataNode 正常运行，Region 可读可写</li><li><strong>Unknown</strong>: Region 所在 DataNode 未正常上报心跳，ConfigNode 认为该 Region 不可读写</li><li><strong>Removing</strong>: Region 所在 DataNode 正在被移出集群，Region 不可读写</li><li><strong>ReadOnly</strong>: Region 所在 DataNode 的磁盘剩余空间低于 disk_warning_threshold（默认 5%），Region 可读，但不能写入，不能同步数据</li></ul><p><strong>单个 Region 的状态切换不会影响所属 RegionGroup 的运行</strong>， 在设置多副本集群时（即元数据副本数和数据副本数大于 1）， 同 RegionGroup 其它 Running 状态的 Region 能保证该 RegionGroup 的高可用性。</p><p><strong>对于一个 RegionGroup：</strong></p><ul><li>当且仅当严格多于一半的 Region 处于 Running 状态时， 该 RegionGroup 可进行数据的查询、写入和删除操作</li><li>如果处于 Running 状态的 Region 少于一半，该 RegionGroup 不可进行数据的数据的查询、写入和删除操作</li></ul><h3 id="展示集群槽信息" tabindex="-1"><a class="header-anchor" href="#展示集群槽信息" aria-hidden="true">#</a> 展示集群槽信息</h3><p>集群使用分区来管理元数据和数据，分区定义如下：</p><ul><li><strong>元数据分区</strong>：SeriesSlot</li><li><strong>数据分区</strong>：<SeriesSlot，SeriesTimeSlot></li></ul><p>在文档<a href="/zh/UserGuide/V1.2.x/Cluster/Cluster-Concept.html" class="">Cluster-Concept</a>中可以查看详细信息。</p><p>可以使用以下 SQL 来查询分区对应信息：</p><h4 id="展示数据分区所在的-dataregion" tabindex="-1"><a class="header-anchor" href="#展示数据分区所在的-dataregion" aria-hidden="true">#</a> 展示数据分区所在的 DataRegion</h4><p>展示某数据库或某设备的数据分区所在的 DataRegion:</p><ul><li><code>- SHOW DATA REGIONID WHERE (DATABASE=root.xxx |DEVICE=root.xxx.xxx) (AND TIME=xxxxx)?</code></li></ul><p>有如下几点说明：</p><ol><li><p>DEVICE 为设备名对应唯一的 SeriesSlot，TIME 为时间戳或者通用时间对应唯一的 SeriesTimeSlot。</p></li><li><p>DATABASE 和 DEVICE 必须以 root 开头，如果是不存在的路径时返回空，不报错，下同。</p></li><li><p>DATABASE 和 DEVICE 目前不支持通配符匹配或者批量查询，如果包含 * 或 ** 的通配符或者输入多个 DATABASE 和 DEVICE 则会报错，下同。</p></li><li><p>TIME 支持时间戳和通用日期。对于时间戳，必须得大于等于0，对于通用日期，需要不早于1970-01-01 00:00:00</p></li></ol><p>示例:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show data regionid where device=root.sg.m1.d1 |
| +--------+ |
| |RegionId| |
| +--------+ |
| | 1| |
| | 2| |
| +--------+ |
| Total line number = 2 |
| It costs 0.006s |
| |
| IoTDB> show data regionid where device=root.sg.m1.d1 and time=604800000 |
| +--------+ |
| |RegionId| |
| +--------+ |
| | 1| |
| +--------+ |
| Total line number = 1 |
| It costs 0.006s |
| |
| IoTDB> show data regionid where device=root.sg.m1.d1 and time=1970-01-08T00:00:00.000 |
| +--------+ |
| |RegionId| |
| +--------+ |
| | 1| |
| +--------+ |
| Total line number = 1 |
| It costs 0.006s |
| |
| IoTDB> show data regionid where database=root.sg |
| +--------+ |
| |RegionId| |
| +--------+ |
| | 1| |
| | 2| |
| +--------+ |
| Total line number = 2 |
| It costs 0.006s |
| |
| IoTDB> show data regionid where database=root.sg and time=604800000 |
| +--------+ |
| |RegionId| |
| +--------+ |
| | 1| |
| +--------+ |
| Total line number = 1 |
| It costs 0.006s |
| |
| IoTDB> show data regionid where database=root.sg and time=1970-01-08T00:00:00.000 |
| +--------+ |
| |RegionId| |
| +--------+ |
| | 1| |
| +--------+ |
| 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 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><h4 id="展示元数据分区所在的-schemaregion" tabindex="-1"><a class="header-anchor" href="#展示元数据分区所在的-schemaregion" aria-hidden="true">#</a> 展示元数据分区所在的 SchemaRegion</h4><p>展示某数据库或某设备的元数据分区所在的 SchemaRegion：</p><ul><li><code>SHOW SCHEMA REGIONID WHERE (DATABASE=root.xxx | DEVICE=root.xxx.xxx)</code></li></ul><p>示例:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show schema regionid where device=root.sg.m1.d2 |
| +--------+ |
| |RegionId| |
| +--------+ |
| | 0| |
| +--------+ |
| Total line number = 1 |
| It costs 0.007s |
| |
| IoTDB> show schema regionid where database=root.sg |
| +--------+ |
| |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 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><h4 id="展示数据库的序列槽" tabindex="-1"><a class="header-anchor" href="#展示数据库的序列槽" aria-hidden="true">#</a> 展示数据库的序列槽</h4><p>展示某数据库内数据或元数据的序列槽（SeriesSlot）：</p><ul><li><code>SHOW (DATA|SCHEMA) SERIESSLOTID WHERE DATABASE=root.xxx</code></li></ul><p>示例:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show data seriesslotid where database = root.sg |
| +------------+ |
| |SeriesSlotId| |
| +------------+ |
| | 5286| |
| +------------+ |
| Total line number = 1 |
| It costs 0.007s |
| |
| IoTDB> show schema seriesslotid where database = 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></div><h4 id="展示过滤条件下的时间分区" tabindex="-1"><a class="header-anchor" href="#展示过滤条件下的时间分区" aria-hidden="true">#</a> 展示过滤条件下的时间分区</h4><p>展示某设备或某数据库或某dataRegion的时间分区（TimePartition）：</p><ul><li><code>SHOW TIMEPARTITION WHERE (DEVICE=root.a.b |REGIONID = r0 | DATABASE=root.xxx) (AND STARTTIME=t1)?(AND ENDTIME=t2)?</code></li></ul><p>有如下几点说明：</p><ol><li><p>TimePartition 是 SeriesTimeSlotId 的简称。</p></li><li><p>REGIONID 如果为 schemaRegion 的 Id 返回空，不报错。</p></li><li><p>REGIONID 不支持批量查询，如果输入多个 REGIONID 则会报错，下同。</p></li><li><p>STARTTIME 和 ENDTIME 支持时间戳和通用日期。对于时间戳，必须得大于等于0，对于通用日期，需要不早于1970-01-01 00:00:00。</p></li><li><p>返回结果中的 StartTime 为 TimePartition 对应时间区间的起始时间。</p></li></ol><p>示例:</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> show timePartition where device=root.sg.m1.d1 |
| +-------------------------------------+ |
| |TimePartition| StartTime| |
| +-------------------------------------+ |
| | 0|1970-01-01T00:00:00.000| |
| +-------------------------------------+ |
| Total line number = 1 |
| It costs 0.007s |
| |
| IoTDB> show timePartition where regionId = 1 |
| +-------------------------------------+ |
| |TimePartition| StartTime| |
| +-------------------------------------+ |
| | 0|1970-01-01T00:00:00.000| |
| +-------------------------------------+ |
| Total line number = 1 |
| It costs 0.007s |
| |
| IoTDB> show timePartition where database = root.sg |
| +-------------------------------------+ |
| |TimePartition| StartTime| |
| +-------------------------------------+ |
| | 0|1970-01-01T00:00:00.000| |
| +-------------------------------------+ |
| | 1|1970-01-08T00:00:00.000| |
| +-------------------------------------+ |
| Total line number = 2 |
| 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 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><h4 id="统计过滤条件下的时间分区个数" tabindex="-1"><a class="header-anchor" href="#统计过滤条件下的时间分区个数" aria-hidden="true">#</a> 统计过滤条件下的时间分区个数</h4><p>统计某设备或某数据库或某dataRegion的时间分区（TimePartition）：</p><ul><li><code>COUNT TIMEPARTITION WHERE (DEVICE=root.a.b |REGIONID = r0 | DATABASE=root.xxx) (AND STARTTIME=t1)?(AND ENDTIME=t2)?</code></li></ul><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB> count timePartition where device=root.sg.m1.d1 |
| +--------------------+ |
| |count(timePartition)| |
| +--------------------+ |
| | 1| |
| +--------------------+ |
| Total line number = 1 |
| It costs 0.007s |
| |
| IoTDB> count timePartition where regionId = 1 |
| +--------------------+ |
| |count(timePartition)| |
| +--------------------+ |
| | 1| |
| +--------------------+ |
| Total line number = 1 |
| It costs 0.007s |
| |
| IoTDB> count timePartition where database = root.sg |
| +--------------------+ |
| |count(timePartition)| |
| +--------------------+ |
| | 2| |
| +--------------------+ |
| 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 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="迁移-region" tabindex="-1"><a class="header-anchor" href="#迁移-region" aria-hidden="true">#</a> 迁移 Region</h3><p>以下 SQL 语句可以被用于手动迁移一个 region， 可用于负载均衡或其他目的。</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>示例:</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 |
| </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></div></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/apache/iotdb/edit/rel/1.2/docs/zh/UserGuide/Cluster/Cluster-Maintenance.md" rel="noopener noreferrer" target="_blank" aria-label="发现错误？在 GitHub 上编辑此页" class="nav-link label"><!--[--><svg xmlns="http://www.w3.org/2000/svg" class="icon edit-icon" viewBox="0 0 1024 1024" fill="currentColor" aria-label="edit icon"><path d="M430.818 653.65a60.46 60.46 0 0 1-50.96-93.281l71.69-114.012 7.773-10.365L816.038 80.138A60.46 60.46 0 0 1 859.225 62a60.46 60.46 0 0 1 43.186 18.138l43.186 43.186a60.46 60.46 0 0 1 0 86.373L588.879 565.55l-8.637 8.637-117.466 68.234a60.46 60.46 0 0 1-31.958 11.229z"></path><path d="M728.802 962H252.891A190.883 190.883 0 0 1 62.008 771.98V296.934a190.883 190.883 0 0 1 190.883-192.61h267.754a60.46 60.46 0 0 1 0 120.92H252.891a69.962 69.962 0 0 0-69.098 69.099V771.98a69.962 69.962 0 0 0 69.098 69.098h475.911A69.962 69.962 0 0 0 797.9 771.98V503.363a60.46 60.46 0 1 1 120.922 0V771.98A190.883 190.883 0 0 1 728.802 962z"></path></svg><!--]-->发现错误？在 GitHub 上编辑此页<span><svg class="external-link-icon" 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"><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="external-link-icon-sr-only">open in new window</span></span><!----></a></div><div class="meta-item git-info"><!----><!----></div></footer><nav class="page-nav"><a href="/zh/UserGuide/V1.2.x/Cluster/Cluster-Setup.html" class="nav-link prev" aria-label="分布式部署"><div class="hint"><span class="arrow start"></span>上一页</div><div class="link"><!---->分布式部署</div></a><a href="/zh/UserGuide/V1.2.x/Cluster/Deployment-Recommendation.html" class="nav-link next" aria-label="部署推荐"><div class="hint">下一页<span class="arrow end"></span></div><div class="link">部署推荐<!----></div></a></nav><!----><!----><!--]--></main><!--]--><footer style="padding-bottom:2rem;"><span id="doc-version" style="display:none;">rel/1.2</span><p style="text-align:center;color:#909399;font-size:12px;margin:0 30px;">Copyright © 2023 The Apache Software Foundation.<br> Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p><p style="text-align:center;margin-top:10px;color:#909399;font-size:12px;margin:0 30px;"><strong>Have a question?</strong> Connect with us on QQ, WeChat, or Slack. <a href="https://github.com/apache/iotdb/issues/1995">Join the community</a> now.</p><p style="text-align:center;margin-top:10px;color:#909399;font-size:12px;margin:0 30px;"> We use <a href="https://analytics.google.com">Google Analytics</a> to collect anonymous, aggregated usage information. </p></footer></div><!--]--><!--]--><!----><!--]--></div> |
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