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href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#confignode-状态定义" class="router-link-active router-link-exact-active toc-link level3">ConfigNode 状态定义</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#展示-datanode-信息" class="router-link-active router-link-exact-active toc-link level2">展示 DataNode 信息</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#datanode-状态定义" class="router-link-active router-link-exact-active toc-link level3">DataNode 状态定义</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#展示全部节点信息" class="router-link-active router-link-exact-active toc-link level2">展示全部节点信息</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#展示-region-信息" class="router-link-active router-link-exact-active toc-link level2">展示 Region 信息</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#region-状态定义" class="router-link-active router-link-exact-active toc-link level3">Region 状态定义</a></li><!----><!--]--></ul><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#展示集群槽信息" class="router-link-active router-link-exact-active toc-link level2">展示集群槽信息</a></li><ul class="toc-list"><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#展示数据分区所在的-dataregion" class="router-link-active router-link-exact-active toc-link level3">展示数据分区所在的 DataRegion</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#展示元数据分区所在的-schemaregion" class="router-link-active router-link-exact-active toc-link level3">展示元数据分区所在的 SchemaRegion</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#展示序列槽下的时间槽" class="router-link-active router-link-exact-active toc-link level3">展示序列槽下的时间槽</a></li><!----><!--]--><!--[--><li class="toc-item"><a aria-current="page" href="/zh/UserGuide/V1.0.x/Cluster/Cluster-Maintenance.html#展示数据库的序列槽" class="router-link-active router-link-exact-active toc-link level3">展示数据库的序列槽</a></li><!----><!--]--></ul><!--]--></ul></div><!--[--><!----><!--]--></aside></div><!----><div class="theme-hope-content"><!--

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--><h1 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</h1><h2 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</h2><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
+----------------------------------+-----------------------------------------------------------------+
|                          Variable|                                                            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|
|            DataRegionPerProcessor|                                                              1.0|
|           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><h2 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</h2><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><h3 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</h3><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</li></ul><h2 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</h2><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><h3 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</h3><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://alioss.timecho.com/docs/img/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</li><li><strong>Removing</strong>: DataNode 正在移出集群，不可读写</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</li></ul><h2 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</h2><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><h2 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</h2><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></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|SeriesSlots|TimeSlots|DataNodeId|RpcAddress|RpcPort|    Role|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
|       0|  DataRegion|Running|root.sg1|          1|        1|         1| 127.0.0.1|   6667|Follower|
|       0|  DataRegion|Running|root.sg1|          1|        1|         2| 127.0.0.1|   6668|  Leader|
|       0|  DataRegion|Running|root.sg1|          1|        1|         3| 127.0.0.1|   6669|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         1| 127.0.0.1|   6667|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         2| 127.0.0.1|   6668|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         3| 127.0.0.1|   6669|  Leader|
|       2|  DataRegion|Running|root.sg2|          1|        1|         1| 127.0.0.1|   6667|  Leader|
|       2|  DataRegion|Running|root.sg2|          1|        1|         2| 127.0.0.1|   6668|Follower|
|       2|  DataRegion|Running|root.sg2|          1|        1|         3| 127.0.0.1|   6669|Follower|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         1| 127.0.0.1|   6667|Follower|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         2| 127.0.0.1|   6668|  Leader|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         3| 127.0.0.1|   6669|Follower|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
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>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|SeriesSlots|TimeSlots|DataNodeId|RpcAddress|RpcPort|    Role|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
|       0|  DataRegion|Running|root.sg1|          1|        1|         1| 127.0.0.1|   6667|Follower|
|       0|  DataRegion|Running|root.sg1|          1|        1|         2| 127.0.0.1|   6668|  Leader|
|       0|  DataRegion|Running|root.sg1|          1|        1|         3| 127.0.0.1|   6669|Follower|
|       2|  DataRegion|Running|root.sg2|          1|        1|         1| 127.0.0.1|   6667|  Leader|
|       2|  DataRegion|Running|root.sg2|          1|        1|         2| 127.0.0.1|   6668|Follower|
|       2|  DataRegion|Running|root.sg2|          1|        1|         3| 127.0.0.1|   6669|Follower|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
Total line number = 6
It costs 0.011s

IoTDB&gt; show schema regions
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
|RegionId|        Type| Status|Database|SeriesSlots|TimeSlots|DataNodeId|RpcAddress|RpcPort|    Role|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
|       1|SchemaRegion|Running|root.sg1|          1|        0|         1| 127.0.0.1|   6667|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         2| 127.0.0.1|   6668|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         3| 127.0.0.1|   6669|  Leader|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         1| 127.0.0.1|   6667|Follower|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         2| 127.0.0.1|   6668|  Leader|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         3| 127.0.0.1|   6669|Follower|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
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|SeriesSlots|TimeSlots|DataNodeId|RpcAddress|RpcPort|    Role|
+--------+------------+-------+-- -----+-----------+---------+----------+----------+-------+--------+
|       0|  DataRegion|Running|root.sg1|          1|        1|         1| 127.0.0.1|   6667|Follower|
|       0|  DataRegion|Running|root.sg1|          1|        1|         2| 127.0.0.1|   6668|  Leader|
|       0|  DataRegion|Running|root.sg1|          1|        1|         3| 127.0.0.1|   6669|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         1| 127.0.0.1|   6667|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         2| 127.0.0.1|   6668|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         3| 127.0.0.1|   6669|  Leader|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
Total line number = 6
It costs 0.007s

IoTDB&gt; show regions of database root.sg1, root.sg2
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
|RegionId|        Type| Status|Database|SeriesSlots|TimeSlots|DataNodeId|RpcAddress|RpcPort|    Role|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
|       0|  DataRegion|Running|root.sg1|          1|        1|         1| 127.0.0.1|   6667|Follower|
|       0|  DataRegion|Running|root.sg1|          1|        1|         2| 127.0.0.1|   6668|  Leader|
|       0|  DataRegion|Running|root.sg1|          1|        1|         3| 127.0.0.1|   6669|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         1| 127.0.0.1|   6667|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         2| 127.0.0.1|   6668|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         3| 127.0.0.1|   6669|  Leader|
|       2|  DataRegion|Running|root.sg2|          1|        1|         1| 127.0.0.1|   6667|  Leader|
|       2|  DataRegion|Running|root.sg2|          1|        1|         2| 127.0.0.1|   6668|Follower|
|       2|  DataRegion|Running|root.sg2|          1|        1|         3| 127.0.0.1|   6669|Follower|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         1| 127.0.0.1|   6667|Follower|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         2| 127.0.0.1|   6668|  Leader|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         3| 127.0.0.1|   6669|Follower|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
Total line number = 12
It costs 0.009s

IoTDB&gt; show data regions of database root.sg1, root.sg2
+--------+----------+-------+--------+-----------+---------+----------+----------+-------+--------+
|RegionId|      Type| Status|Database|SeriesSlots|TimeSlots|DataNodeId|RpcAddress|RpcPort|    Role|
+--------+----------+-------+--------+-----------+---------+----------+----------+-------+--------+
|       0|DataRegion|Running|root.sg1|          1|        1|         1| 127.0.0.1|   6667|Follower|
|       0|DataRegion|Running|root.sg1|          1|        1|         2| 127.0.0.1|   6668|  Leader|
|       0|DataRegion|Running|root.sg1|          1|        1|         3| 127.0.0.1|   6669|Follower|
|       2|DataRegion|Running|root.sg2|          1|        1|         1| 127.0.0.1|   6667|  Leader|
|       2|DataRegion|Running|root.sg2|          1|        1|         2| 127.0.0.1|   6668|Follower|
|       2|DataRegion|Running|root.sg2|          1|        1|         3| 127.0.0.1|   6669|Follower|
+--------+----------+-------+--------+-----------+---------+----------+----------+-------+--------+
Total line number = 6
It costs 0.007s

IoTDB&gt; show schema regions of database root.sg1, root.sg2
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
|RegionId|        Type| Status|Database|SeriesSlots|TimeSlots|DataNodeId|RpcAddress|RpcPort|    Role|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
|       1|SchemaRegion|Running|root.sg1|          1|        0|         1| 127.0.0.1|   6667|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         2| 127.0.0.1|   6668|Follower|
|       1|SchemaRegion|Running|root.sg1|          1|        0|         3| 127.0.0.1|   6669|  Leader|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         1| 127.0.0.1|   6667|Follower|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         2| 127.0.0.1|   6668|  Leader|
|       3|SchemaRegion|Running|root.sg2|          1|        0|         3| 127.0.0.1|   6669|Follower|
+--------+------------+-------+--------+-----------+---------+----------+----------+-------+--------+
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><h3 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</h3><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><h2 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</h2><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>：序列槽</li><li><strong>数据分区</strong>：&lt;序列槽，时间分区槽&gt;</li></ul><p>可以使用以下 SQL 来查询分区对应信息：</p><h3 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</h3><p>展示一个数据分区（或一个序列槽下的所有数据分区）所在的 DataRegion:</p><ul><li><code>SHOW DATA REGIONID OF root.sg WHERE SERIESSLOTID=s0 (AND TIMESLOTID=t0)</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 regionid of root.sg where seriesslotid=5286 and timeslotid=0
+--------+
|RegionId|
+--------+
|       1|
+--------+
Total line number = 1
It costs 0.006s

IoTDB&gt; show data regionid of root.sg where seriesslotid=5286
+--------+
|RegionId|
+--------+
|       1|
|       2|
+--------+
Total line number = 2
It costs 0.006s
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="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</h3><p>展示一个元数据分区所在的 SchemaRegion：</p><ul><li><code>SHOW SCHEMA REGIONID OF root.sg WHERE SERIESSLOTID=s0</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 of root.sg where seriesslotid=5286
+--------+
|RegionId|
+--------+
|       0|
+--------+
Total line number = 1
It costs 0.007s
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="展示序列槽下的时间槽" tabindex="-1"><a class="header-anchor" href="#展示序列槽下的时间槽" aria-hidden="true">#</a> 展示序列槽下的时间槽</h3><p>展示一个序列槽下的所有时间槽：</p><ul><li><code>SHOW TIMESLOTID OF root.sg WHERE SERIESLOTID=s0 (AND STARTTIME=t1) (AND ENDTIME=t2)</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 timeslotid of root.sg where seriesslotid=5286
+----------+
|TimeSlotId|
+----------+
|         0|
|      1000|
+----------+
Total line number = 1
It costs 0.007s
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div><h3 id="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</h3><p>展示一个数据库内，数据，元数据或是所有的序列槽：</p><ul><li><code>SHOW (DATA|SCHEMA)? SERIESSLOTID OF root.sg</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 of root.sg
+------------+
|SeriesSlotId|
+------------+
|        5286|
+------------+
Total line number = 1
It costs 0.007s

IoTDB&gt; show schema seriesslotid of root.sg
+------------+
|SeriesSlotId|
+------------+
|        5286|
+------------+
Total line number = 1
It costs 0.006s

IoTDB&gt; show seriesslotid of root.sg
+------------+
|SeriesSlotId|
+------------+
|        5286|
+------------+
Total line number = 1
It costs 0.006s
</code></pre><div class="line-numbers" aria-hidden="true"><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div><div class="line-number"></div></div></div></div><!----><footer class="page-meta"><div class="meta-item edit-link"><a href="https://github.com/apache/iotdb/edit/rel/1.0/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/V1.0.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/V1.0.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/1.0</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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