Sorry, reply to wrong email :) On Oct 10, 2011, at 10:08 PM, Stoyan Marinov wrote: > 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 at centos.org >> http://lists.centos.org/mailman/listinfo/centos-virt > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt