I have an incredibly light-weight cephfs configuration. I set up an MDS on each mon (3 total), and have 9TB of data in cephfs. This data only has 1 client that reads a few files at a time. I haven't noticed any downtime when it fails over to a standby MDS. So it definitely depends on your workload as to how a failover will affect your environment.
On Mon, Jun 12, 2017 at 9:59 AM John Petrini <jpetr...@coredial.com> wrote: > We use the following in our ceph.conf for MDS failover. We're running one > active and one standby. Last time it failed over there was about 2 minutes > of downtime before the mounts started responding again but it did recover > gracefully. > > [mds] > max_mds = 1 > mds_standby_for_rank = 0 > mds_standby_replay = true > > ___ > > John Petrini > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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