On Tue, Oct 6, 2015 at 11:43 AM, Dzianis Kahanovich <mahatma@xxxxxxxxxxxxxx> wrote: > Short: how to sure avoid (if possible) fs freezes on 1 of 3 mds rejoin? > > ceph version 0.94.3-242-g79385a8 (79385a85beea9bccd82c99b6bda653f0224c4fcd) > > I moving 2 VM clients from ocfs2 (starting to deadlock VM on snapshot) to > cephfs (at least I can backup it). May be I just don't see it before, may be > there are cephfs pressure problem, but while 1 of 3 mds rejoin (slow!) - > whole mds cluster stuck (but, good news - all clients alive after). How to > make mds cluster reliable on at least 1 restart? It's not exactly clear to me how you've got this set up. What's the output of "ceph status"? John > > My current mds config: > > [mds] > mds recall state timeout = 120 > mds bal mode = 1 > mds standby replay = true > mds cache size = 500000 > mds mem max = 2097152 > mds op history size = 50 > # vs. laggy beacon > mds decay halflife = 9 > mds beacon interval = 8 > mds beacon grace = 30 > > [mds.a] > host = megaserver1 > [mds.b] > host = megaserver3 > [mds.c] > host = megaserver4 > > (I trying to unswitch all non-defaults, IMHO no results - fixme) > Or may be I need special care on mds stop (now - SIGKILL). > > -- > WBR, Dzianis Kahanovich AKA Denis Kaganovich, http://mahatma.bspu.unibel.by/ > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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