On Fri, Mar 31, 2006 at 10:04:53AM -0500, Bill Rugolsky Jr. wrote:
> On Fri, Mar 31, 2006 at 04:57:26PM +0200, Jakob Oestergaard wrote:
> > True. But it is my impression that this is a problem isolated on the
> > client side (am I wrong?)
>
> That seems to be the case.
Hmm...
>
> > Do you mean NFS exporting a local filesystem, NFS mounting it again on
> > the local host? Or do you mean something with loopback mounts?
>
> The former; just export a local directory to 127.0.0.1 in /etc/exports,
> then mount it on /mnt.
With a local export/mount I see very few reads running the test :/
Could this be a timing issue? That pages in the cache are invalidated
after maybe less than 100 microseconds which is roughly the round-trip
time on the gigabit network connecting my server and client?
/proc/self/mountstats on the two filesystems look identical to me:
device sparrow:/exported/joe mounted on /u/joe with fstype nfs statvers=1.0
opts: rw,vers=3,rsize=32768,wsize=32768,acregmin=3,acregmax=60,
acdirmin=30,acdirmax=60,hard,intr,proto=udp,timeo=7,retrans=3
device localhost:/home/test mounted on /mnt with fstype nfs statvers=1.0
opts: rw,vers=3,rsize=32768,wsize=32768,acregmin=3,acregmax=60,
acdirmin=30,acdirmax=60,hard,intr,proto=udp,timeo=7,retrans=3
--
/ jakob
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