Am 13. April 2012 11:58 schrieb Jerker Nyberg <jerker at update.uu.se>: > On Fri, 13 Apr 2012, Philip wrote: > > Does anyone have an idea what could be the reason for such a bad >> performance? 22 Disks in a RAID10 should deliver *way* more throughput. >> > > You may already have done so but you can check IO-utilization of the > devices with the flag "-x" to "iostat" like for example "iostat -x 2" over > a two second interval. Check percentage utilization in the "%util" column > to the right. If you are closer to 100 than 0 then they (the disk > subsystem) might actually be busy. > > --jerker > ______________________________**_________________ > Gluster-users mailing list > Gluster-users at gluster.org > http://gluster.org/cgi-bin/**mailman/listinfo/gluster-users<http://gluster.org/cgi-bin/mailman/listinfo/gluster-users> > Here is the output (Outgoing bandwidth is currently at 380 Mbps): Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sdb 1.00 0.00 129.50 0.00 42624.00 0.00 329.14 1.53 10.97 3.63 47.00 avg-cpu: %user %nice %system %iowait %steal %idle 0.06 0.00 0.53 2.82 0.00 96.60 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.00 0.50 0.00 0.50 0.00 8.00 16.00 0.00 0.00 0.00 0.00 sdb 1.00 0.00 184.00 47.50 64084.00 29412.00 403.87 1.81 8.29 2.16 50.00 avg-cpu: %user %nice %system %iowait %steal %idle 0.06 0.00 0.59 2.50 0.00 96.85 Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 sdb 1.00 0.00 156.50 0.00 54944.00 0.00 351.08 1.30 8.28 2.62 41.00 avg-cpu: %user %nice %system %iowait %steal %idle 0.21 0.00 0.48 1.61 0.00 97.70 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://gluster.org/pipermail/gluster-users/attachments/20120413/eb2f5abd/attachment.htm>
