3pointer

Support generate undo SQL from TiCDC log

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## Feature Request ### Describe your feature request related problem: Part of #325, After https://github.com/pingcap/ticdc/issues/768 TiCDC support external storage. BR then has the ability to decode the log data to...

## Feature Request ### Describe your feature request related problem: When backup lots of tables(60k+), the default checksum-concurrency(4) might cost too much CPU resources. When backup a big table, the...

fix restore auto increment ID overflow

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### What problem does this PR solve? when auto_increment id reached max.Int64, it can backs up success. but failed when restore. we should handle this situation. ### What is changed...

BR restore progress bar is inaccurate

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1. What did you do? Perform restore with dataset 2T size, restore progress bar is inaccurate, after check the [code](https://github.com/pingcap/br/blob/6268cde45e6a05b5e46d1208b31ea18a1770b8ba/pkg/restore/split.go#L137) found that progress has increase more than `len(keys)` when split...

Check whether table has data before the restoration.

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## Feature Request ### Describe your feature request related problem: problem is like #797 When the table already has some data before we do a full restore job and the...

Reduce split empty region during restoration.

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Please answer these questions before submitting your issue. Thanks! 1. What did you do? If possible, provide a recipe for reproducing the error. restore data and check the empty region...

record store id when download/ingest failed.

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Please answer these questions before submitting your issue. Thanks! 1. What did you do? If possible, provide a recipe for reproducing the error. we didn't record store id when download/ingest...

## Feature Request ### Describe your feature request related problem: Currently, we had some incompatible issues with some feature enabled. for example (`clustered index`, `new collation`). When backup with `clustered...

1. What did you do? If possible, provide a recipe for reproducing the error. restore met error ``` [ERROR] [restore.go:24] ["failed to restore"] [error="[tikv:9010]TiKV server reports stale command"] [errorVerbose="[tikv:9010]TiKV server...

Support generate difference backup with log backup

2

## Feature Request ### Describe your feature request related problem: Part of #325, After https://github.com/pingcap/ticdc/issues/768 TiCDC support external storage. we have the ability to generate lots of log backup with...