On Sat, 18 Jun 2005, Tom Keiser wrote:
So, can anybody comment on these numbers? Those are dual Opteron
boxes with enough RAM, so please make some suggestions what options I
should try to get more like the real performance of a fileserver...
What kernel? What underlying filesystem?
The performance figures you mentioned when talking directly to the
raid, are they when doing IO on a filesystem that are similar to the
AFS IO pattern (ie accessing a large number of small files)? Streaming
IO figures are more or less uninteresting when doing AFS in our
experience.
If using ext*, go for ext2 and boot the machine with SMP disabled and
se what happens. This improved the situation somewhat for us, but this
was on a 2.4 kernel tho (albeit 2.6 is said to still have issues wrt
ext3 and SMP).
Filesystem-wise, xfs seems to be the best performing (and most robust)
filesystem on Linux nowadays, but I don't know whether it's supported
to have your /vice* on Linux-XFS...
/Nikke
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Niklas Edmundsson, Admin @ {acc,hpc2n}.umu.se | [EMAIL PROTECTED]
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