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import{_ as s,C as d,O as l,P as a,ah as o,Q as t,U as e,ai as r,ae as v,aW as n}from"./framework-62ad666a.js";const u={},c=n(`<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&gt; 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&gt; 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&gt; create timeseries root.sg.d1.s1 with datatype=BOOLEAN,encoding=PLAIN
Msg: The statement is executed successfully.
IoTDB&gt; create timeseries root.sg.d2.s1 with datatype=BOOLEAN,encoding=PLAIN
Msg: The statement is executed successfully.
IoTDB&gt; create timeseries root.ln.d1.s1 with datatype=BOOLEAN,encoding=PLAIN
Msg: The statement is executed successfully.
IoTDB&gt; 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&gt; insert into root.ln.d1(timestamp,s1) values(1,true)
Msg: The statement is executed successfully.
IoTDB&gt; 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&gt; 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&gt; 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&gt; 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 &lt;sg1,sg2,...&gt;</code>: 展示指定数据库 &lt;sg1,sg2,...&gt; 对应的 Region 分布</li><li><code>SHOW (DATA|SCHEMA)? REGIONS ON NODEID &lt;id1,id2,...&gt;</code>: 展示指定节点 &lt;id1,id2,...&gt; 对应的 Region 分布</li><li><code>SHOW (DATA|SCHEMA)? REGIONS (OF DATABASE &lt;sg1,sg2,...&gt;)? (ON NODEID &lt;id1,id2,...&gt;)?</code>: 展示指定数据库 &lt;sg1,sg2,...&gt; 在指定节点 &lt;id1,id2,...&gt; 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&gt; 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&gt; 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&gt; 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 &lt;sg1,sg2,...&gt; 对应的 Region 分布：</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB&gt; 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&gt; 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&gt; 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&gt; 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 &lt;id1,id2,...&gt; 对应的 Region 分布：</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB&gt; 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&gt; 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 &lt;sg1,sg2,...&gt; 在指定节点 &lt;id1,id2,...&gt; 对应的 Region 分布：</p><div class="language-text line-numbers-mode" data-ext="text"><pre class="language-text"><code>IoTDB&gt; 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&gt; 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>：&lt;SeriesSlot，SeriesTimeSlot&gt;</li></ul>`,64),g=n(`<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&gt; show data regionid where device=root.sg.m1.d1
+--------+
|RegionId|
+--------+
| 1|
| 2|
+--------+
Total line number = 2
It costs 0.006s
IoTDB&gt; show data regionid where device=root.sg.m1.d1 and time=604800000
+--------+
|RegionId|
+--------+
| 1|
+--------+
Total line number = 1
It costs 0.006s
IoTDB&gt; 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&gt; show data regionid where database=root.sg
+--------+
|RegionId|
+--------+
| 1|
| 2|
+--------+
Total line number = 2
It costs 0.006s
IoTDB&gt; show data regionid where database=root.sg and time=604800000
+--------+
|RegionId|
+--------+
| 1|
+--------+
Total line number = 1
It costs 0.006s
IoTDB&gt; 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&gt; show schema regionid where device=root.sg.m1.d2
+--------+
|RegionId|
+--------+
| 0|
+--------+
Total line number = 1
It costs 0.007s
IoTDB&gt; 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&gt; show data seriesslotid where database = root.sg
+------------+
|SeriesSlotId|
+------------+
| 5286|
+------------+
Total line number = 1
It costs 0.007s
IoTDB&gt; 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&gt; 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&gt; show timePartition where regionId = 1
+-------------------------------------+
|TimePartition| StartTime|
+-------------------------------------+
| 0|1970-01-01T00:00:00.000|
+-------------------------------------+
Total line number = 1
It costs 0.007s
IoTDB&gt; 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&gt; count timePartition where device=root.sg.m1.d1
+--------------------+
|count(timePartition)|
+--------------------+
| 1|
+--------------------+
Total line number = 1
It costs 0.007s
IoTDB&gt; count timePartition where regionId = 1
+--------------------+
|count(timePartition)|
+--------------------+
| 1|
+--------------------+
Total line number = 1
It costs 0.007s
IoTDB&gt; 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 &lt;Region-id&gt; FROM &lt;original-DataNodeId&gt; TO &lt;dest-DataNodeId&gt;
</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&gt; 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&gt; MIGRATE REGION 1 FROM 3 TO 4
Msg: The statement is executed successfully.
IoTDB&gt; 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>`,34);function m(b,R){const i=d("RouterLink");return l(),a("div",null,[o(`
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