[OpenAFS] improving cache partition performance

[Jason Edgecombe]

hi everyone,

I'm looking at some performance problems on our web servers, and I think 
that hard drive performance is a bottleneck. All filesystems are on a 
RAID0 disk array with two 7200RPM disks (no battery-backed cache). The 
cache is on a dedicated ext3 partition. At some points, my await times 
on the disk are up to 1000ms. How can I improve this? Would setting 
commit time larger than 5 seconds be OK? Would setting the ext3 journal 
type to "data=writeback" be OK?

platform: RHEL5.5 x86_64

Thanks,
Jason