Hi,
IIRC the rbd mirror journals will grow if the sync stops to work,
which seems to be the case here. Does the primary cluster experience
any high load when the replay stops? How is the connection between the
two sites and is the link saturated? Does the rbd-mirror log reveal
anything useful (maybe also in debug mode)?
Regards,
Eugen
Zitat von Josef Johansson <josef@xxxxxxxxxxx>:
Hi,
I'm running ceph octopus 15.2.16 and I'm trying out two way mirroring.
Everything seems to running fine except sometimes when the replay
stops at the primary clusters.
This means that VMs will not start properly until all journal
entries are replayed, but also that the journal grows by time.
I am trying to find out why this occurs, and where to look for more
information.
I am currently using rbd --pool <pool> --image <image> journal
status to see if the clients are in sync or not.
Example output when things went sideways
minimum_set: 0
active_set: 2
registered clients:
[id=, commit_position=[positions=[[object_number=0, tag_tid=1,
entry_tid=4592], [object_number=3, tag_tid=1, entry_tid=4591],
[object_number=2, tag_tid=1, entry_tid=4590], [object_number=1,
tag_tid=1, entry_tid=4589]]], state=connected]
[id=bdde9b90-df26-4e3d-84b3-66605dc45608,
commit_position=[positions=[[object_number=5, tag_tid=1,
entry_tid=19913], [object_number=4, tag_tid=1, entry_tid=19912],
[object_number=7, tag_tid=1, entry_tid=19911], [object_number=6,
tag_tid=1, entry_tid=19910]]], state=disconnected]
Right now I'm trying to catch it red handed in the primary osd logs.
But I'm not even sure if that's the process that is replaying the
journal..
Regards
Josef
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