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[doc](website)fe elastic scaling documentation issue (#11471)

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fe elastic scaling documentation issue
This commit is contained in:
jiafeng.zhang
2022-08-04 13:57:59 +08:00
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commit 9ed36aa48b
2 changed files with 27 additions and 14 deletions
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21
docs/en/docs/admin-manual/cluster-management/elastic-expansion.md
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@ -51,6 +51,16 @@ FE is divided into three roles: Leader, Follower and Observer. By default, a clu
The first FE to start automatically becomes Leader. On this basis, several Followers and Observers can be added.
#### Configure and start Follower or Observer.
Follower and Observer are configured with Leader. The following commands need to be executed at the first startup:
`bin/start_fe.sh --helper host:edit_log_port --daemon`
The host is the node IP of Leader, and the edit\_log\_port in Lead's configuration file fe.conf. The --helper is only required when follower/observer is first startup.
#### Add Follower or Observer to the cluster
Add Follower or Observer. Connect to the started FE using mysql-client and execute:
`ALTER SYSTEM ADD FOLLOWER "follower_host:edit_log_port";`
@ -61,12 +71,6 @@ or
The follower\_host and observer\_host is the node IP of Follower or Observer, and the edit\_log\_port in its configuration file fe.conf.
Configure and start Follower or Observer. Follower and Observer are configured with Leader. The following commands need to be executed at the first startup:
`bin/start_fe.sh --helper host:edit_log_port --daemon`
The host is the node IP of Leader, and the edit\_log\_port in Lead's configuration file fe.conf. The --helper is only required when follower/observer is first startup.
View the status of Follower or Observer. Connect to any booted FE using mysql-client and execute:
```SHOW PROC '/frontends';```
@ -133,8 +137,8 @@ DECOMMISSION clause:
> 3. The order **does not necessarily carry out successfully**. For example, when the remaining BE storage space is insufficient to accommodate the data on the offline BE, or when the number of remaining machines does not meet the minimum number of replicas, the command cannot be completed, and the BE will always be in the state of `SystemDecommissioned` as true.
> 4. The progress of DECOMMISSION can be viewed through `SHOW PROC '/backends';` Tablet Num, and if it is in progress, Tablet Num will continue to decrease.
> 5. The operation can be carried out by:
> ```CANCEL ALTER SYSTEM DECOMMISSION BACKEND "be_host:be_heartbeat_service_port";```
> The order was cancelled. When cancelled, the data on the BE will maintain the current amount of data remaining. Follow-up Doris re-load balancing
> ```CANCEL ALTER SYSTEM DECOMMISSION BACKEND "be_host:be_heartbeat_service_port";```
> The order was cancelled. When cancelled, the data on the BE will maintain the current amount of data remaining. Follow-up Doris re-load balancing
**For expansion and scaling of BE nodes in multi-tenant deployment environments, please refer to the [Multi-tenant Design Document](../multi-tenant.md).**
@ -147,3 +151,4 @@ There is no rigid requirement for the number of Broker instances. Usually one ph
```ALTER SYSTEM DROP ALL BROKER broker_name;```
Broker is a stateless process that can be started or stopped at will. Of course, when it stops, the job running on it will fail. Just try again.

20
docs/zh-CN/docs/admin-manual/cluster-management/elastic-expansion.md
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@ -51,6 +51,18 @@ FE 分为 Leader，Follower 和 Observer 三种角色。 默认一个集群，
第一个启动的 FE 自动成为 Leader。在此基础上，可以添加若干 Follower 和 Observer。
#### 配置及启动 Follower 或 Observer
这里 Follower 和 Observer 的配置同 Leader 的配置。
首先第一次启动时，需执行以下命令：
`./bin/start_fe.sh --helper leader_fe_host:edit_log_port --daemon`
其中 leader\_fe\_host 为 Leader 所在节点 ip, edit\_log\_port 在 Leader 的配置文件 fe.conf 中。--helper 参数仅在 follower 和 observer 第一次启动时才需要。
#### 将 Follower 或 Observer 加入到集群
添加 Follower 或 Observer。使用 mysql-client 连接到已启动的 FE，并执行：
`ALTER SYSTEM ADD FOLLOWER "follower_host:edit_log_port";`
@ -61,12 +73,6 @@ FE 分为 Leader，Follower 和 Observer 三种角色。 默认一个集群，
其中 follower\_host和observer\_host 为 Follower 或 Observer 所在节点 ip，edit\_log\_port 在其配置文件 fe.conf 中。
配置及启动 Follower 或 Observer。Follower 和 Observer 的配置同 Leader 的配置。第一次启动时，需执行以下命令：
`./bin/start_fe.sh --helper leader_fe_host:edit_log_port --daemon`
其中 leader\_fe\_host 为 Leader 所在节点 ip, edit\_log\_port 在 Leader 的配置文件 fe.conf 中。--helper 参数仅在 follower 和 observer 第一次启动时才需要。
查看 Follower 或 Observer 运行状态。使用 mysql-client 连接到任一已启动的 FE，并执行：SHOW PROC '/frontends'; 可以查看当前已加入集群的 FE 及其对应角色。
> FE 扩容注意事项：
@ -139,3 +145,5 @@ Broker 实例的数量没有硬性要求。通常每台物理机部署一个即
```ALTER SYSTEM DROP ALL BROKER broker_name;```
Broker 是无状态的进程，可以随意启停。当然，停止后，正在其上运行的作业会失败，重试即可。