Hello, completely ignoring your question about primary-affinity (which always struck me as a corner case thing). ^o^ If you're adding SSDs to your cluster you will want to: a) use them for OSD journals (if you're not doing so already) b) create dedicated pools for high speed data (i.e. RBD images for DB storage) c) use them for cache-tiering. The last one is a much more efficient approach than primary-affinity, since hot objects will wind up on the SSDs, as opposed to random ones. Christian On Thu, 18 Aug 2016 11:07:50 +0200 Florent B wrote: > Hi everyone, > > I begin to insert some SSD disks in my Ceph setup. > > For now I only have 600GB on SSD (14 000 GB total space). > > So my SSDs can't store *each* PG of my setup, for now. > > If I set primary-affinity to 0 on non-SSD disks, will I get a problem > for PGs stored on standard spinning disks ? > > For example, a PG is on OSD 4,15,18, if they have primary-affinity to > 0.00000, will it be a problem to elect a primary ? > > Do I have to set primary-affinity to 0.00001 for non-SSD disks ? > > Thank you ;) > > Flo > > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > -- Christian Balzer Network/Systems Engineer chibi@xxxxxxx Global OnLine Japan/Rakuten Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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