Hello *,
thx for taking care. I read "works as designed, be sure to have disk
space for the mon available". It sounds a little odd that the growth
from 50MB to ~15GB + compaction space happens within a couple of
seconds, when two OSD rejoin the cluster. Does it matter if I have
cephfs in use? Usually I would expect to have MDS load, but does it also
cause load on the mon with many files?
My OSD map seems to have low absolute numbers:
ceph report | grep osdmap | grep committed
report 777999536
"osdmap_first_committed": 1276,
"osdmap_last_committed": 1781,
If a get new disks (partitions) for the mons, is there a size
recommendation? Is there a rule of thumb? BTW: Do I still need a
filesystem for the partition of the mon DB?
Beste Regards,
derjohn
On 02.10.20 16:25, Dan van der Ster wrote:
The important metric is the difference between these
two values:
# ceph report | grep osdmap | grep committed
report 3324953770
"osdmap_first_committed": 3441952,
"osdmap_last_committed": 3442452,
The mon stores osdmaps on disk, and trims the older versions whenever
the PGs are clean. Trimming brings the osdmap_first_committed to be
closer to osdmap_last_committed.
In a cluster with no PGs backfilling or recovering, the mon should
trim that difference to be within 500-750 epochs.
If there are any PGs backfilling or recovering, then the mon will not
trim beyond the osdmap epoch when the pools were clean.
So if you are accumulating gigabytes of data in the mon dir, it
suggests that you have unclean PGs/Pools.
Cheers, dan
On Fri, Oct 2, 2020 at 4:14 PM Marc Roos <M.Roos(a)f1-outsourcing.eu> wrote:
Does this also count if your cluster is not healthy because of errors
like '2 pool(s) have no replicas configured'
I sometimes use these pools for testing, they are empty.
-----Original Message-----
Cc: ceph-users
Subject: [ceph-users] Re: Massive Mon DB Size with noout on 14.2.11
As long as the cluster is no healthy, the OSD will require much more
space, depending on the cluster size and other factors. Yes this is
somewhat normal.
_______________________________________________
ceph-users mailing list -- ceph-users(a)ceph.io
To unsubscribe send an email to ceph-users-leave(a)ceph.io
_______________________________________________
ceph-users mailing list -- ceph-users(a)ceph.io
To unsubscribe send an email to ceph-users-leave(a)ceph.io
--
Andreas John
net-lab GmbH | Frankfurter Str. 99 | 63067 Offenbach
Geschaeftsfuehrer: Andreas John | AG Offenbach, HRB40832
Tel: +49 69 8570033-1 | Fax: -2 |
http://www.net-lab.net
Facebook:
https://www.facebook.com/netlabdotnet
Twitter:
https://twitter.com/netlabdotnet