On 10/6/10 6:28 PM, Rick Romero wrote:
Is your disk a virtual disk as well? Have you checked performance?
Something like:
| hdparm -tT /dev/sda|
On a ZFS RAID 10 of 10 7200RPM SATA drives, I get about 100MB/s
At work we have an EMC SAN, and I get like 350MB/s on that beast - but
if this is just a vhd on a Windows box, that could be an issue..
The disks are virtual on an EMC iSCSI san. I know you're supposed to run
hdparm when things are quiet, but trying it now (somewhat quiet) I get:
on the NFS server:
Timing cached reads: 11844 MB in 2.00 seconds = 5928.81 MB/sec
Timing buffered disk reads: 176 MB in 3.00 seconds = 58.62 MB/sec
on the dovecot server (where indexes are stored):
Timing cached reads: 12310 MB in 2.00 seconds = 6162.13 MB/sec
Timing buffered disk reads: 230 MB in 3.02 seconds = 76.22 MB/sec
--
Chris Hobbs
Director, Technology
New Haven Unified School District
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