Support clustered index in BR

[overvenus]

Feature Request

Is your feature request related to a problem? Please describe:

TiDB implements clustered index in 5.0, ref: pingcap/tidb#17044, BR is not compatible with clustered index now

Describe the feature you'd like:

Support clustered index in BR

Time

GanttStart: 2020-09-09
GanttDue: 2020-10-30
GanttProgress: 0%

Workload estimation(person-day)

• Develop & QA: 10
• Document: 1

[kennytm]

what is the incompatibility?

[coocood]

We already use BR for clustered index, there seems no incompatibility.

[overvenus]

That's great! Looks like all we need to do is to add a check to prevent BR 4.0 to backup/restore TiDB 5.0.

[kennytm]

we already have a version check since #311. major version mismatch (e.g. BR 4.0 ↔ TiKV 5.0) is disallowed.

[overvenus]

Versions of the nightly release of TiDB and TiKV are wrong, TiDB shows 4.0.0-beta.2, TiKV shows 4.1.0-alpha 😢