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mds: force replay sessionmap version #49970

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merged 1 commit into from Mar 13, 2023
Merged

mds: force replay sessionmap version #49970

merged 1 commit into from Mar 13, 2023

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lxbsz
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@lxbsz lxbsz commented Feb 2, 2023

When expiring the MDLog Segments will it persist the sessionmap, but what if the number of Segments doesn't reach up to the max segment threshhold the expiring may won't happen.

So if the MDS failover then the sessionmap won't be persist and couldn't be replayed by the standby MDS when it starting. We should just force replay the sessionmap version just the inotable does.

Fixes: https://tracker.ceph.com/issues/58489
Signed-off-by: Xiubo Li xiubli@redhat.com

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@lxbsz lxbsz requested a review from a team February 2, 2023 07:49
@github-actions github-actions bot added the cephfs Ceph File System label Feb 2, 2023
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lxbsz commented Feb 3, 2023

jenkins test make check

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@lxbsz I would also like to suggest this commit message as i feel the current one needs some corrections:

When expiring the MDLog Segments it will persist the sessionmap,
but in case the number of Segments doesn't reach up to the max
segment threshold then the expiry may not happen.

So if there is a MDS failover then the sessionmap won't be persistent and
cannot be replayed by the standby MDS when it is starting. We should
just force replay the sessionmap version just the way inotable does.

When expiring the MDLog Segments it will persist the sessionmap, but
in case the number of Segments doesn't reach up to the max segment
threshold then the expiry may not happen.

So if there is a MDS failover then the sessionmap won't be persistent
and cannot be replayed by the standby MDS when it is starting. We
should just force replay the sessionmap version just the way inotable
does.

Fixes: https://tracker.ceph.com/issues/58489
Signed-off-by: Xiubo Li <xiubli@redhat.com>
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@lxbsz There were two issues, one is the replay stuck for really long time and other is the crash. Does this fix both the issues ?

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lxbsz commented Feb 14, 2023

@lxbsz There were two issues, one is the replay stuck for really long time and other is the crash. Does this fix both the issues ?

@kotreshhr They should be the same issue IMO.

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LGTM

@vshankar vshankar added the wip-vshankar-backlog Backlog of CephFS PRs to pick for testing label Feb 28, 2023
@vshankar vshankar added wip-vshankar-testing1 and removed wip-vshankar-backlog Backlog of CephFS PRs to pick for testing labels Mar 8, 2023
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jenkins test api

vshankar added a commit to vshankar/ceph that referenced this pull request Mar 13, 2023
* refs/pull/49970/head:
	mds: force replay sessionmap version
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