BR: wait for tiflash synced after restore. #43828
Labels
affects-6.5
This bug affects the 6.5.x(LTS) versions.
affects-7.1
This bug affects the 7.1.x(LTS) versions.
component/br
This issue is related to BR of TiDB.
type/enhancement
The issue or PR belongs to an enhancement.
Enhancement
Current when doing restore with tiflash replica. BR only send ingest command to leader. and won't guarantee the learner replcia(tiflash) apply the ingest command. just let raft ensure the eventually consistency.
In some scenario. user may want to wait tiflash ready to serve and the config of sync replica between tikv and tiflash may not as fast as enough.
We need an option to make BR wait for tiflash ready to serve after restore.
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