ummm....ok. and, how would the affected PG recover, just replacing the affected OSD/DISK? or would the affected PG migrate to othe OSD/DISK? thx On 23/09/16 10:56, Nick Fisk wrote: > >> -----Original Message----- >> From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Ja. C.A. >> Sent: 23 September 2016 09:50 >> To: ceph-users@xxxxxxxxxxxxxx >> Subject: Re: 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 <lists@xxxxxxxxxxxxx>: >>>> >>>> >>>> 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@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 >> _______________________________________________ >> 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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