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Improving system high availability when the disk experiences jitter. #7377

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bufferflies opened this issue Nov 16, 2023 · 1 comment
Open

Improving system high availability when the disk experiences jitter. #7377

bufferflies opened this issue Nov 16, 2023 · 1 comment
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type/enhancement The issue or PR belongs to an enhancement.

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@bufferflies
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Enhancement Task

The current leader and TSO services rely on the etcd lease functionality. When the disk experiences jitter, it may cause the leader or TSO service to become unavailable or have very high latency, severely impacting the TIDB service.

we can transfer pd leader into another pd follower to mitigate the affects for the tso if the leader's disk experiences jitter. I believe the probability of all three disks experiencing disk jitter simultaneously should be very low.
@bufferflies bufferflies added the type/enhancement The issue or PR belongs to an enhancement. label Nov 16, 2023
@bufferflies bufferflies mentioned this issue Nov 16, 2023
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ti-chi-bot bot added a commit that referenced this issue Nov 16, 2023
@HuSharp @ti-chi-bot
member: avoid frequent campaign times (#7301)
0ebf4b2 
close #7251, ref #7377

when pd leader frequently campaign leader, but etcd leader did not change.
We need to prevent this pd leader campaign and resign to another member.

Signed-off-by: husharp <jinhao.hu@pingcap.com>

Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
@bufferflies
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closed #7301

@bufferflies bufferflies reopened this Jan 9, 2024
@niubell niubell mentioned this issue Jan 12, 2024
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@ti-chi-bot ti-chi-bot mentioned this issue Feb 1, 2024
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ti-chi-bot bot added a commit that referenced this issue Feb 2, 2024
@ti-chi-bot @HuSharp @ti-chi-bot
member: avoid frequent campaign times (#7301) (#7790)
ae19047 
close #7251, ref #7377

when pd leader frequently campaign leader, but etcd leader did not change.
We need to prevent this pd leader campaign and resign to another member.

Signed-off-by: husharp <jinhao.hu@pingcap.com>

Co-authored-by: husharp <jinhao.hu@pingcap.com>
Co-authored-by: ti-chi-bot[bot] <108142056+ti-chi-bot[bot]@users.noreply.github.com>
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@bufferflies