Hi, my 2 cents, but is the crushmap ok ? (are you sure that replication occur on osd on differents servers )
But indeed, replication is parallel, from first node to others node. So it shouldn't slow down( of course, if hardware is same everywhere). ----- Mail original ----- De: "Dietmar Maurer" <[email protected]> À: "Eric Blevins" <[email protected]>, [email protected] Envoyé: Lundi 30 Décembre 2013 18:47:24 Objet: Re: [pve-devel] ceph replication speed > size=3: > When you write to only three OSDs, each one replicates to two more OSDs, a > total of 9 OSD writes. > Half of the OSDs make two writes, I would expect reduced performance with > 50% of the OSDs doing twice the work. Thought a bit more about that, it does not really explain the slowdown. If all 6 OSD writes the overall throughput should be even better. Anyway, I will test that. _______________________________________________ pve-devel mailing list [email protected] http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel _______________________________________________ pve-devel mailing list [email protected] http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
