"Did you check the BIOS/Power settings? They should be set for high performance. Also you can try to boot "intel_idle.max_cstate=0" kernel command line option to be sure CPUs not entering power saving states. On Thu, Feb 22, 2018 at 9:59 AM, Ryan Wilkinson <ryanwilk@xxxxxxxxx> wrote: > > > I have a 3 host gluster replicated cluster that is providing storage for our > RHEV environment. We've been having issues with inconsistent performance > from the VMs depending on which Hypervisor they are running on. I've > confirmed throughput to be ~9Gb/s to each of the storage hosts from the > hypervisors. I'm getting ~300MB/s disk read spead when our test vm is on > the slow Hypervisors and over 500 on the faster ones. The performance > doesn't seem to be affected much by the cpu, memory that are in the > hypervisors. I have tried a couple of really old boxes and got over 500 > MB/s. The common thread seems to be that the poorly perfoming hosts all > have Dell's Idrac 7 Enterprise. I have one Hypervisor that has Idrac 7 > express and it performs well. We've compared system packages and versions > til we're blue in the face and have been struggling with this for a couple > months but that seems to be the only common denominator. I've tried on one > of those Idrac 7 hosts to disable the nic, virtual drive, etc, etc. but no > change in performance. In addition, I tried 5 new hosts and all are > complying to the Idrac enterprise theory. Anyone else had this issue?! > > > > _______________________________________________ > Gluster-users mailing list > Gluster-users@xxxxxxxxxxx > http://lists.gluster.org/mailman/listinfo/gluster-users _______________________________________________ Gluster-users mailing list Gluster-users@xxxxxxxxxxx http://lists.gluster.org/mailman/listinfo/gluster-users
