On Fri, 25 Mar 2016 14:14:37 -0700 Bob R wrote: > Mike, > > Recovery would be based on placement groups and those degraded groups > would only exist on the storage pool(s) rather than the cache tier in > this scenario. > Precisely.
They are entirely different entities. There may be partially identical data (clean objects) in them, but that will with near certainty never be enough for recovery/backfill operation. Never mind that it would be akin to crossing the streams. Christian > Bob > > On Fri, Mar 25, 2016 at 8:30 AM, Mike Miller <[email protected]> > wrote: > > > Hi, > > > > in case of a failure in the storage tier, say single OSD disk failure > > or complete system failure with several OSD disks, will the remaining > > cache tier (on other nodes) be used for rapid backfilling/recovering > > first until it is full? Or is backfill/recovery done directly to the > > storage tier? > > > > Thanks and regards, > > > > Mike > > _______________________________________________ > > ceph-users mailing list > > [email protected] > > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > > -- Christian Balzer Network/Systems Engineer [email protected] Global OnLine Japan/Rakuten Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list [email protected] http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
