Supports co-balance range group

[nolouch]

Description

the placement rules which can place the regions in the stores which meet the label constraint. but in some situations, we need the range to share the same balance strategy and the peers always place in the same node. such as https://github.com/pingcap/tidb/issues/19805

The range group can add or remove interleaved ranges, that's mean the range inside is not necessarily continuous. each range group shares the same statistics, balance strategy, and same placement, It can be seen as a single region, in the future, TiKV can support to make them into one raft group.

the workload example: https://github.com/pingcap/tidb/issues/19381

SIG slack channel

• #sig-scheduling

Tasks

• [ ] Detail design
• [ ] Supports group unit
• [ ] Share the balance strategy and statistic for the group
• [ ] Supports the DDL like mentioned in https://github.com/pingcap/tidb/issues/19805

Score

• 6600

Mentor

• @Yisaer

Recommended Skills

• Go

[Yisaer]

The detailed design would be released by @Yisaer recently.

[ti-challenge-bot[bot]]

It has been added to the challenge program, but your issue description has some problems.

More

**Tip** : You need to ensure that the description of the issue follows the following template: ``` ## Score - ${score} ## Mentor - ${mentor} ``` **Warning**: The description format for this issue is wrong.

[Rustin170506]

@nolouch @Yisaer Could you please modify the description of issue to follow this challenge program template?

[nolouch]

@Rustin-Liu ok

[frankwyw7]

/ping

[ti-challenge-bot[bot]]

pong! I am challenge bot.