doris/ALTER-SYSTEM-ADD-BACKEND.md at a0b95d8fcb29ae8d9f7754824725b3bdbabcb2ac

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Mingyu Chen 74a482ca7f [fix] fix docs build bug (#9293 )

After this PR #9272, the `docs/build_help_zip.sh` will run failed.
This PR fix this issue.
But the help module still has some parse problem, I will fix it in next PR.

This CL mainly changes:
1. fix `docs/build_help_zip.sh` error
2. remove `sql-reference-v2` to `sql-reference`
3. modify build extension github action to run `docs/build_help_zip.sh`

2022-04-28 22:19:04 +08:00

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title, language

title	language
ALTER-SYSTEM-ADD-BACKEND	en

ALTER-SYSTEM-ADD-BACKEND

Name

ALTER SYSTEM ADD BACKEND

Description

This statement is used to manipulate nodes within a system. (Administrator only!)

grammar:

-- Add nodes (add this method if you do not use the multi-tenancy function)
   ALTER SYSTEM ADD BACKEND "host:heartbeat_port"[,"host:heartbeat_port"...];
-- Add idle nodes (that is, add BACKEND that does not belong to any cluster)
   ALTER SYSTEM ADD FREE BACKEND "host:heartbeat_port"[,"host:heartbeat_port"...];
-- Add nodes to a cluster
   ALTER SYSTEM ADD BACKEND TO cluster_name "host:heartbeat_port"[,"host:heartbeat_port"...];

illustrate:

host can be a hostname or an ip address
heartbeat_port is the heartbeat port of the node
Adding and deleting nodes is a synchronous operation. These two operations do not consider the existing data on the node, and the node is directly deleted from the metadata, please use it with caution.

Example

Add a node
```
ALTER SYSTEM ADD BACKEND "host:port";
```

Add an idle node

ALTER SYSTEM ADD FREE BACKEND "host:port";

Keywords

ALTER, SYSTEM, ADD, BACKEND

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