> -----Original Message----- > From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of Ja. > C.A. > Sent: 23 September 2016 09:50 > To: ceph-users@lists.ceph.com > Subject: Re: [ceph-users] rbd pool:replica size choose: 2 vs 3 > > Hi > > with rep_size=2 and min_size=2, what drawbacks are removed compared with > rep_size=2 and min_size=1?
If you lose a disk, everything will stop working until the affected PG's are at size=2 again. > > thx > J. > > On 23/09/16 10:07, Wido den Hollander wrote: > >> Op 23 september 2016 om 10:04 schreef mj <li...@merit.unu.edu>: > >> > >> > >> Hi, > >> > >> On 09/23/2016 09:41 AM, Dan van der Ster wrote: > >>>> If you care about your data you run with size = 3 and min_size = 2. > >>>> > >>>> Wido > >> We're currently running with min_size 1. Can we simply change this, > >> online, with: > >> > >> ceph osd pool set vm-storage min_size 2 > >> > >> and expect everything to continue running? > >> > > Yes, it will. No rebalance will happen. min_size = 2 just tells Ceph that 2 > > replicas need to be online for I/O (Read and Write) to > continue. > > > > Wido > > > >> (our cluster is HEALTH_OK, enough disk space, etc, etc) > >> > >> MJ > >> _______________________________________________ > >> ceph-users mailing list > >> ceph-users@lists.ceph.com > >> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > _______________________________________________ > > ceph-users mailing list > > ceph-users@lists.ceph.com > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
