OK, I think I managed to fix it. Please check and let me know. Stoyan On Oct 10, 2011, at 9:43 PM, Dennis Jacobfeuerborn wrote: > On 10/10/2011 08:27 PM, Nehemiah wrote: >> but thats what I'm asking you to investigate. All you see is a symptom, >> more data may clarify the situation. Weren't you taking data from both >> inside the guests an on the host's disks. It was kind of unclear. > > The guest number are the ones that are not consistent with each other or > across restarts of the guests: > > seekmark: > guest 1: 120 seeks/s > guest 2: 220 seeks/s > > "hdparm -t" shows: > guest 1: 100 MB/s > guest 2: 160 MB/s > > The host numbers are the ones of the physical drives: > seekmark: > /dev/sdb: 75 seeks/s > /dev/sdc: 75 seeks/s > > hdparm -t: > /dev/sdb: 140 MB/s > /dev/sdc: 140 MB/s > > The physical numbers are consistent and what I would expect to see from the > sata drives. > The guests are minimal centos 6 installations so after booting they have > virtually no processes running that could influence the benchmarks in any > significant way. The hosts system is installed on /dev/sda so /dev/sd(b|c) > are not influenced by the host system either. > The entire setup is arranged to make benchmarking mostly reliable. > If there were minor temporary fluctuations I would blame some external > process but differences of almost 100% that are consistent for the lifetime > of the virtual machine do not fit such a scenario. > > Regards, > Dennis > _______________________________________________ > CentOS-virt mailing list > CentOS-virt@xxxxxxxxxx > http://lists.centos.org/mailman/listinfo/centos-virt _______________________________________________ CentOS-virt mailing list CentOS-virt@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos-virt
