sig-transaction

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nrc

Currently the green-gc is [disabled](https://github.com/pingcap/tidb/pull/22533) by default as it still has some corener cases or [issues](https://github.com/tikv/tikv/issues/8184) to solve. As the hibernate region is default [enabled](https://github.com/tikv/tikv/pull/9735) just on the master branch,...

cfzjywxk

Pending async commit transactions don't necessarily block read

4

Now the `min_commit_ts` of async commit transactions cannot be advanced like the legacy transactions. So if our read timestamp is larger than the `min_commit_ts` of an async-commit lock, we can...

sticnarf

[Discussion] Reconsider the way we write UNIT test

3

I fell our **unit** tests in TiKV somehow not satisfing. For example when reviewing [tikv#9514](https://github.com/tikv/tikv/pull/9514), which changed the **rollback collapse logic**, I found it breaked some test cases in **`mvcc::reader`**....

longfangsong

Need disable async commit and 1PC during the upgrade from TiDB < 5.0

5

Async commit and 1PC are fundamental changes to the transaction protocol in TiDB. There will be new kinds of locks that need to be handled in new ways. Therefore, it...

sticnarf

Find a solution for schema version check problem for 1PC

2

Previously we found that schema version checking might be a problem. Later we think it can be solved if we define a transaction to be committed iff all its keys...

MyonKeminta

add async commit downgrading design doc

6

It is likely we need to provide a solution for downgrading from TiKV 5.0 to 4.0. Here is the doc about handling async commit.

sticnarf

Compatible issues between async commit and green GC

5

1. Green GC is not compatible with async commit if async apply is enabled: A lock isn't applied and the transaction may be committed. 2. TBD

youjiali1995

Add document about single region 1PC

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Signed-off-by: MyonKeminta This PR adds a draft document for single region 1PC. This PR is also expected to be the place to do related discussions.

MyonKeminta

Adapt async commit/1pc with multi data center

18

## Background We are going to finish async commit in 5.0, and there's going to be another important feature in 5.0: Local/Global transaction in cross DC deployment. In that feature,...

MyonKeminta