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docs: add balance vgroup and redistribute vgroup

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Shengliang Guan 2023-01-11 17:29:29 +08:00
parent 45ec75a5f3
commit f57a617ae3
4 changed files with 38 additions and 2 deletions
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16
docs/en/12-taos-sql/02-database.md
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@ -154,3 +154,19 @@ TRIM DATABASE db_name;
```
The preceding SQL statement deletes data that has expired and orders the remaining data in accordance with the storage configuration.
## Redistribute Vgroup
```sql
REDISTRIBUTE VGROUP vgroup_no DNODE dnode_id1 [DNODE dnode_id2] [DNODE dnode_id3]
```
Adjust the distribution of vnodes in the vgroup according to the given list of dnodes.
## Balance Vgroup
```sql
BALANCE VGROUP
```
Automatically adjusts the distribution of vnodes in all vgroups of the cluster, which is equivalent to load balancing the data of the cluster at the vnode level.

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docs/en/12-taos-sql/29-changes.md
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@ -75,7 +75,9 @@ The following data types can be used in the schema for standard tables.
| 49 | SHOW TRANSACTIONS | Added | Shows all running transactions in the system.
| 50 | SHOW DNODE VARIABLES | Added | Shows the configuration of the specified dnode.
| 51 | SHOW VNODES | Not supported | Shows information about vnodes in the system. Not supported.
| 53 | TRIM DATABASE | Added | Deletes data that has expired and orders the remaining data in accordance with the storage configuration.
| 52 | TRIM DATABASE | Added | Deletes data that has expired and orders the remaining data in accordance with the storage configuration.
| 53 | REDISTRIBUTE VGROUP | Added | Adjust the distribution of VNODES in VGROUP.
| 54 | BALANCE VGROUP | Added | Auto adjust the distribution of VNODES in VGROUP.
## SQL Functions

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docs/zh/12-taos-sql/02-database.md
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@ -154,3 +154,19 @@ TRIM DATABASE db_name;
```
删除过期数据，并根据多级存储的配置归整数据。
## 调整VGROUP中VNODE的分布
```sql
REDISTRIBUTE VGROUP vgroup_no DNODE dnode_id1 [DNODE dnode_id2] [DNODE dnode_id3]
```
按照给定的dnode列表，调整vgroup中的vnode分布。因为副本数目最大为3，所以最多输入3个dnode。
## 自动调整VGROUP中VNODE的分布
```sql
BALANCE VGROUP
```
自动调整集群所有vgroup中的vnode分布，相当于在vnode级别对集群进行数据的负载均衡操作。

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docs/zh/12-taos-sql/29-changes.md
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@ -75,7 +75,9 @@ description: "TDengine 3.0 版本的语法变更说明"
| 49 | SHOW TRANSACTIONS | 新增 | 显示当前系统中正在执行的事务的信息。
| 50 | SHOW DNODE VARIABLES | 新增 |显示指定DNODE的配置参数。
| 51 | SHOW VNODES | 暂不支持 | 显示当前系统中VNODE的信息。3.0.0版本暂不支持。
| 53 | TRIM DATABASE | 新增 | 删除过期数据，并根据多级存储的配置归整数据。
| 52 | TRIM DATABASE | 新增 | 删除过期数据，并根据多级存储的配置归整数据。
| 53 | REDISTRIBUTE VGROUP | 新增 | 调整VGROUP中VNODE的分布。
| 54 | BALANCE VGROUP | 新增 | 自动调整VGROUP中VNODE的分布。
## SQL 函数变更