I am also planning to create SSD only cluster using multiple OSD on using few hosts,Whats the best way to get maximum performance out of SSD disks. I dont have the cluster running,but seeing this thread makes me worry that RBD will not be able to extract full capability of SSD disks.I am beginner in ceph,still learning about ceph. On Tue, Feb 3, 2015 at 1:00 AM, Gregory Farnum <greg@xxxxxxxxxxx> wrote: > On Mon, Feb 2, 2015 at 11:28 AM, Andrei Mikhailovsky <andrei@xxxxxxxxxx> wrote: >> >> ________________________________ >> >> >> I'm not sure what you mean about improvements for SSD disks, but the >> OSD should be generally a bit faster. There are several cache tier >> improvements included that should improve performance on most >> workloads that others can speak about in more detail than I. >> >> >> What i mean by the SSD disk improvement is that currently, the cluster made >> of all ssd disks is pretty slow. You will not get the IO throughput of the >> SSDs. My tests show the limit seems to be around 3K IOPs even though the >> ssds can easily do 50K+ IOps. This makes it impossible to have a decent >> database workload on the ceph cluster. > > > Yeah, Hammer is notably faster than Firefly (and I think better than > Giant), but it's incremental work. You're not suddenly going to get > 50k IOPS in a single-threaded RBD workload against one OSD. > -Greg > _______________________________________________ > 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
 |