Any EC pool with m=1 is fragile. By default, min_size = k+1, so you'd immediately stop IO the moment you lose a single OSD. min_size can be lowered to k, but that can cause data loss and corruption. You should set m=2 at a minimum. 4+2 doesn't take much more space than 4+1, and it's far safer. On Fri, Aug 2, 2019 at 11:21 PM <vitalif@xxxxxxxxxx> wrote: > > > where small means 32kb or smaller going to BlueStore, so <= 128kb > > writes > > from the client. > > > > Also: please don't do 4+1 erasure coding, see older discussions for > > details. > > Can you point me to the discussion abort the problems of 4+1? It's not > easy to google :) > > -- > Vitaliy Filippov > _______________________________________________ > 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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