On Thu, 12 Mar 2015 12:49:51 PM Vieresjoki, Juha wrote: > But there's really no point, block storage is the only viable option for > virtual machines performance-wise. With images you're dealing with multiple > filesystem layers on top of the actual block devices, plus Ceph as block > storage supports pretty much everything that qcow2 as a format does.
Not much difference that I've noticed on the small system I run, in fact cepfs seems to do some caching which speeds up things considerably in benchmarks. Not a huge difference in actual app performance that I've noticed. Delete/Restore of snapshots is a lot quicker with qcow2 and for somereasons saving memory state is orders of magnitude quicker with qcow2. _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
