Messages in this thread | | | From | "Matthias Urlichs" <> | Date | Tue, 3 Nov 1998 12:48:18 +0100 | Subject | Re: NFS read performance ugliness |
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Hi,
Zlatko Calusic: > > I'm attaching two tcpdump logs (one from Solaris and one from > Linux). On both logs, machine names are shortened to local (always > Linux - client) and remote (always Solaris - server). Logs are taken > while I was doing cp /dev/zero, on Linux side (copying to NFS mounted > directory, of course). > > 1/2) tcpdump log on Solaris (server) side: > [...] > 2/2) tcpdump log on Linux (client) side > > 11:37:23.484132 local > remote: (frag 1251:1308@2960) > 11:37:23.484227 local > remote: (frag 1251:1480@1480+) > 11:37:23.484343 local.4047701504 > remote.nfs: 1472 write [|nfs] (frag 1251:1480@0+) > 11:37:23.542237 remote.nfs > local.4047701504: reply ok 96 write [|nfs] (DF)
That looks like the Solaris box takes its time writing the data to disk (i.e., no networking problems).
I don't have any idea why it would do that. 50 msec for a simple 4096-byte write?? Give me a break...
-- Matthias Urlichs | noris network GmbH | smurf@noris.de | ICQ: 20193661 The quote was selected randomly. Really. | http://www.noris.de/~smurf/ -- You have several detached dead trees.
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