[ceph-users] Re: Multiple CephFS creation

On Mar 31, 2020, at 2:15 PM, Nathan Fish <lordcirth(a)gmail.com> wrote: Yes, standby (as opposed to standby-replay) MDS' form a shared pool from which the mons will promote an MDS to the required role. On Tue, Mar 31, 2020 at 12:52 PM Jarett DeAngelis <jarett(a)reticulum.us> wrote: > > So, for the record, this doesn’t appears to work in Nautilus. > > > > Does this mean that I should just count on my standby MDS to “step in” when a new FS is created? > >> On Mar 31, 2020, at 3:19 AM, Eugen Block <eblock(a)nde.ag> wrote: >> >>> This has changed in Octopus. The above config variables are removed. >>> Instead, follow this procedure.: >>> >>> https://docs.ceph.com/docs/octopus/cephfs/standby/#configuring-mds-file-sys… >> >> Thanks for the clarification, IIRC I had troubles applying the mds_standby settings in Nautilus already, but I haven't verified yet so I didn't mention that in my response. I'll take another look at it. >> >> >> Zitat von Patrick Donnelly <pdonnell(a)redhat.com>om>: >> >>> On Mon, Mar 30, 2020 at 11:57 PM Eugen Block <eblock(a)nde.ag> wrote: >>>> For the standby daemon you have to be aware of this: >>>> >>>>> By default, if none of these settings are used, all MDS daemons >>>>> which do not hold a rank will >>>>> be used as 'standbys' for any rank. >>>>> [...] >>>>> When a daemon has entered the standby replay state, it will only be >>>>> used as a standby for >>>>> the rank that it is following. If another rank fails, this standby >>>>> replay daemon will not be >>>>> used as a replacement, even if no other standbys are available. >>>> >>>> Some of the mentioned settings are for example: >>>> >>>> mds_standby_for_rank >>>> mds_standby_for_name >>>> mds_standby_for_fscid >>>> >>>> The easiest way is to have one standby daemon per CephFS and let them >>>> handle the failover. >>> >>> This has changed in Octopus. The above config variables are removed. >>> Instead, follow this procedure.: >>> >>> https://docs.ceph.com/docs/octopus/cephfs/standby/#configuring-mds-file-sys… >>> >>> -- >>> Patrick Donnelly, Ph.D. >>> He / Him / His >>> Senior Software Engineer >>> Red Hat Sunnyvale, CA >>> GPG: 19F28A586F808C2402351B93C3301A3E258DD79D >> >> >> _______________________________________________ >> 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