I know this isn't strictly Clearcase, but somebody on the list might
know
the answer...
I export views from Solaris to Linux (as everybody on the list knows by
now!).
The performance on these exported views, well, basically it sucks. I
did a
little experimentation and found that the performance to any NFS-mounted
filesystem from my Linux box sucks, so the problem is not in Clearcase.
My test setups are:
1) Solaris server -> solaris client with nfs v3
2) Solaris server -> solaris client with nfs v2
3) Solaris server -> linux client with nfs v2
4) Linux server -> linux client with nfs v2
Tests are reading/writing 8 meg of data using dd (reading from
/dev/zero,
writing to /dev/null).
All reads are very fast. I can read 8 meg of data from any server
to any client in a ridiculously short period of time, i.e. well under
a second.
Writing from solaris to solaris, linux to linux, or solaris client
to linux server takes about 8 seconds. I can live with this.
Writing from linux client to solaris server (i.e. the one I really care
about)
takes about 30 to 35 seconds.
I've tried changing the cache size for both read and write caches but,
while I can make things much worse, I can't make things better.
I'm running Red Hat 6.1, but I see the same behaviour with 5.1. Linux
doesn't have an nfs v3 client (or at least my version doesn't).
So has anybody else seen - and solved - this problem?
Thanks in advance,
Lezz Giles
-- Leslie Giles Software Release Manager Avici Systems Inc lgiles@avici.com Phone: 978.964.2030 Fax: 978.964.2100"Do not fear the merge"
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