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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. 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. | 49 | SHOW TRANSACTIONS | Added | Shows all running transactions in the system.
| 50 | SHOW DNODE VARIABLES | Added | Shows the configuration of the specified dnode. | 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. | 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 ## 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。 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。 | 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。 | 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。 | 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 ## SQL 函数变更