We have 2 sets of identical hardware, identically configured, both
exhibiting disk i/o performance problems with 2 of their 4 DomUs
The DomUs in question each act as a nfs filesever. The fileserver is made
up from 2 zvols, one holds the DomU (solaris 10) and the other is mounted
to the DomU and contains the user's files which are then nfs exported. Both
zvols are formatted as UFS. For the first 25-30 nfs clients performance is
OK, after that client performance drops off rapidly e.g. a "ls -l" of the
user's home area taking 90 seconds. Everything is stock - no tuning.
Anyone any suggestions what I can do to improve matters - would using ZFS
rather than UFS for the user disk change matters?
The underlying disks are managed by a hardware RAID controller so the zpool
in the Dom0 just sees a single disk.
Thanks
John Landamore
Dept Computer Science
University of Leicester
UK
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