System profiling tools?

[Jason Santos]

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On Tuesday 22 March 2005 03:25 pm, Alan Dayley wrote:
> I want to find the overhead.  Is it the software RAID?  Is it the SATA
> controller?  Is it the IP stack?  Or a combination of these or other
> things?
>

If you have a good-size amount of ram, make a gig or so RAM disk or other=20
memory-based filesystem and share some files from there.  Do some timing=20
tests.

Use a program like ttcp to test the network bandwidth between two machines.

I used to administer a box (IBM x235 I believe, running SuSE 7), that would=
=20
easily get over 100MB/sec on NFS reads over GigE (133MHz PCI Intel GigE=20
card).  On most Sun boxes I have worked with (pre-Solaris 10), I could easi=
ly=20
get 60MB/sec.

You didn't mention how you are accessing the files, are you using NFS? Samb=
a?
=2D-=20
Jason Santos
http://www.megaslow.net

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