On Thu, Oct 18, 2007 at 12:50:44PM +0200, Mario Kadastik wrote:
> Hello,
>
> I have a slight problem. Namely we have 4 systems with each having 2x
> 3ware 9550SX cards in them each with hardware RAID5. Everything is
> running the latest FW etc. The systems have at least 3GB of memory
> and at least 2 CPU-s (one has 4GB and 4 cpu-s).
Before going any further, what kernel are you using and what's
the output of xfs_info </mntpt> of the filesytsem you are testing?
FWIW, high iowait = high load average. High iowait is generally an
indicator of an overloaded disk subsystem. You tests to the raw
device only used a single stream, so it's unlikely to show any of
the issues you're complaining about when running tens of parallel
streams....
Cheers,
Dave.
--
Dave Chinner
Principal Engineer
SGI Australian Software Group
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