On 17/04/14 01:18, Leszek Master wrote: > 1) I'm using OpenNebula 4.4 with ceph datastore. When i try to make > snapshot i've got error: > 3) Is there any way to use copy-on-write in opennebula 4.4 ?
I did some experimental work on this with our OpenNebula 4.4 instance. It relies on modern kernel's ability to map version-2 RBD images using the kernel rbd driver, so it needs kernel >3.10 (? Not sure of exact version; we're using 3.13). This newer format allows copy-on-write cloning. "Hot" snapshots work, however I haven't managed to trigger a deferred snapshot, so that's untested. The driver also makes use of hypervisor-side cache using FlashCache, allocating slices of a nominated LVM volume to boost performance. I've thrown my work into a git repository for now, consider this very much pre-alpha. If you're brave, feel free to give it a go: git clone git://git.longlandclan.yi.org/opennebula-ceph-flashcache.git Regards, -- Stuart Longland Systems Engineer _ ___ \ /|_) | T: +61 7 3535 9619 \/ | \ | 38b Douglas Street F: +61 7 3535 9699 SYSTEMS Milton QLD 4064 http://www.vrt.com.au _______________________________________________ Users mailing list Users@lists.opennebula.org http://lists.opennebula.org/listinfo.cgi/users-opennebula.org