[D] Data loss during detection period [kvrocks]

["superchee0526 (via GitHub)" <gi...@apache.org>]

GitHub user superchee0526 created a discussion: Data loss during detection period

I have a question about the master/slave switch process.

During the controller’s detection period, the old master can still accept write requests, but it cannot replicate the data to the slaves. After the failure is detected, one of the slaves is promoted to master. Even the old master later rejoins the cluster, the data written during that detection period is lost.

Is my understanding correct?

GitHub link: https://github.com/apache/kvrocks/discussions/3173

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Re: [D] Data loss during detection period [kvrocks]

["superchee0526 (via GitHub)" <gi...@apache.org>]

GitHub user superchee0526 added a comment to the discussion: Data loss during detection period

Thank you!

GitHub link: https://github.com/apache/kvrocks/discussions/3173#discussioncomment-14409909

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Re: [D] Data loss during detection period [kvrocks]

["git-hulk (via GitHub)" <gi...@apache.org>]

GitHub user git-hulk added a comment to the discussion: Data loss during detection period

@superchee0526 

> Is my understanding correct?

Yes, that's correct for the current implementation. But we can mitigate this issue after introducing the WAIT command in the next release.

GitHub link: https://github.com/apache/kvrocks/discussions/3173#discussioncomment-14402093

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