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Dear All...
Our infrastructure is the following:
- We use CEPH/CEPHFS (9.2.0)
- We have 3 mons and 8 storage servers supporting 8 OSDs each.
- We use SSDs for journals (2 SSDs per storage server, each
serving 4 OSDs).
- We have one main mds and one standby-replay mds.
- We are using ceph-fuse client to mount cephfs.
We are on our way to prepare an upgrade to Jewel 10.2.1 since CephFS
is announced as production and ceph-fuse does has ACL support (which
is something we do need).
I do have a couple questions regarding the upgrade procedure:
1) Can we jump directly from 9.2.0 to 10.2.1? Or
should we go through all the intermediate releases (9.2.0 -->
9.2.1 --> 10.2.0 --> 10.2.1)?
2) The upgrade procedure establishes that the upgrade order
should be: 1) MONS, 2) OSDs, 3) MDS and 4) Clients.
2.1) Can I upgrade / restart each MON independently? Or
should I shutdown all MONs and only restart the services all are
in the same version?
2.2) I am guessing that it is safe to keep OSDS in
server B running (under 9.2.0) while we upgrade OSDS in server B
to a newer version. Can you please confirm?
2.3) Finally, can I upgrade / restart each MDS
independently? If yes, is there a particular order (like first
the standby-replay one and then the main one)? Or should I
shutdown all MDS services (making sure that no clients are
connected) and only restart the services when all are in the
same version?
Thank you for your answers
Cheers
Goncalo
--
Goncalo Borges
Research Computing
ARC Centre of Excellence for Particle Physics at the Terascale
School of Physics A28 | University of Sydney, NSW 2006
T: +61 2 93511937
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