Am 16.02.2016 um 11:55 schrieb Dietmar Maurer: >> Is it enough to just change these: > > The whole backup algorithm is based on 64KB blocksize, so it > is not trivial (or impossible?) to change that. > > Besides, I do not understand why reading 64KB is slow - ceph libraries > should have/use a reasonable readahead cache to make it fast? >
OK i found the culprit at least in my case. I've reasanle IOP/s numbers for my VMs set. It seems they're also active for the backup process. But they're not optimized for 64k sequential I/O. Also this means the user has not the full performance while doing backups. May you have seen the same while testing? If i remove the disk throttle limits i see around 130MB/s for the vma backup. Stefan _______________________________________________ pve-devel mailing list pve-devel@pve.proxmox.com http://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
