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br restore splits too much regions if there are too many small tables whose data size is less than region size. #53532

Closed
Tracked by #50701
Leavrth opened this issue May 24, 2024 · 2 comments · Fixed by #55662
Closed
Tracked by #50701

br restore splits too much regions if there are too many small tables whose data size is less than region size. #53532

Leavrth opened this issue May 24, 2024 · 2 comments · Fixed by #55662
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component/br This issue is related to BR of TiDB. severity/major type/bug The issue is confirmed as a bug.

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@Leavrth
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Leavrth commented May 24, 2024

Bug Report

Please answer these questions before submitting your issue. Thanks!

1. Minimal reproduce step (Required)

  1. create so many tables, but each table only has a little data.
  2. backup cluster with split-table=false/split-region-on-table=false
  3. restore cluster

2. What did you expect to see? (Required)

the number of regions of downstream cluster is closed to the number of upstream cluster.

3. What did you see instead (Required)

the number of regions has many regions.

4. What is your TiDB version? (Required)

master
@Leavrth Leavrth added type/bug The issue is confirmed as a bug. severity/moderate component/br This issue is related to BR of TiDB. labels May 24, 2024
@BornChanger
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It's an extension of #50701

This was referenced May 24, 2024
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@Leavrth Leavrth added affects-8.1 This bug affects the 8.1.x(LTS) versions. and removed may-affects-5.4 This bug maybe affects 5.4.x versions. may-affects-6.1 may-affects-6.5 may-affects-7.1 may-affects-7.5 may-affects-8.1 labels May 28, 2024
@Leavrth Leavrth mentioned this issue Jul 31, 2024
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@Leavrth Leavrth removed the affects-8.1 This bug affects the 8.1.x(LTS) versions. label Aug 1, 2024
@Leavrth
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Leavrth commented Aug 7, 2024

We need to do some clean work at first. See #52877

This was referenced Aug 8, 2024
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@Leavrth Leavrth mentioned this issue Aug 26, 2024
Merged
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@ti-chi-bot ti-chi-bot bot closed this as completed in 782f08c Sep 4, 2024
@ti-chi-bot ti-chi-bot bot added the affects-7.5 This bug affects the 7.5.x(LTS) versions. label Sep 25, 2024
@ti-chi-bot ti-chi-bot mentioned this issue Sep 25, 2024
Closed
13 tasks
@BornChanger BornChanger removed the affects-7.5 This bug affects the 7.5.x(LTS) versions. label Sep 25, 2024
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@Leavrth @BornChanger