On Thu, 19 Dec 2013 21:01:47 +0100 Wido den Hollander wrote: > On 12/19/2013 08:39 PM, Wolfgang Hennerbichler wrote: > > On 19 Dec 2013, at 16:43, Gruher, Joseph R <joseph.r.gruher@xxxxxxxxx> > > wrote: > > > >> It seems like this calculation ignores that in a large Ceph cluster > >> with triple replication having three drive failures doesn't > >> automatically guarantee data loss (unlike a RAID6 array)? > > > > not true with RBD images, which are potentially striped across the > > whole cluster. > > You could always increase the order so that you end up with 64MB objects > instead of 4MB objects. > It is my understanding that this would likely significantly impact performance of those RBD images... Christian -- Christian Balzer Network/Systems Engineer chibi@xxxxxxx Global OnLine Japan/Fusion Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
 |