Re: [PATCH 0/4] 2.6.21-rc7 NFS writes: fix a series of issues

Florin Iucha
2007-04-19T01:52:34Z

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On Wed, Apr 18, 2007 at 10:11:46AM -0400, Trond Myklebust wrote:
> Do you have a copy of wireshark or ethereal on hand? If so, could you
> take a look at whether or not any NFS traffic is going between the
> client and server once the hang happens?

I used the following command

tcpdump -w nfs-traffic -i eth0 -vv -tt dst port nfs

to capture

http://iucha.net/nfs/21-rc7-nfs4/nfs-traffic.bz2

I started the capture before starting the copy and left it to run for
a few minutes after the traffic slowed to a crawl.

The iostat and vmstat are at:

http://iucha.net/nfs/21-rc7-nfs4/iostat
http://iucha.net/nfs/21-rc7-nfs4/vmstat

It seems that my original problem report had a big mistake! There is
no hang, but at some point the write slows down to a trickle (from
40,000 blocks/s to 22 blocks/s) as can be seen from the iostat log.

Regards,
florin

--
Bruce Schneier expects the Spanish Inquisition.
http://geekz.co.uk/schneierfacts/fact/163

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