On Tue, Apr 21, 2020 at 03:34:47PM +0200, Rainer Krienke wrote: > Hello, > > just wanted to thank you for your help and to tell you that I found the > culprit that made my read-perfomance look rarther small on a proxmox VM > with a LV based on 4 disks (rdbs). The best result using bonnie++ as a > test was about 100MBytes/sec on a single VM read performance. > > I remembered that right after I switched to LVM striping I had tested > the default block size LVM would use which was 64K. I found this value > rather small and replaces it by 512K, which increased read and write > speed. > > I remenbered this fact and again changed the stripe size to the default > RBD object size which is 4MB. Using this value the read performance went > up to 400MBytes/sec and if I run two bonnies on two different VMs the > total read performance in ceph is about 800MBytes/sec > The write performance in this 2VMs test is about 1.2GByte/sec. The 4 MB chunk size is good for Ceph. But how is the intended workload performing on those VMs?
-- Cheers, Alwin _______________________________________________ pve-user mailing list pve-user@pve.proxmox.com https://pve.proxmox.com/cgi-bin/mailman/listinfo/pve-user
