Umount nfs strangely slow
Jonathan Ryshpan
jonrysh at pacbell.net
Sat Apr 4 05:12:39 UTC 2009
On Fri, 2009-04-03 at 23:11 -0430, Patrick O'Callaghan wrote:
> On Fri, 2009-04-03 at 19:08 -0700, Jonathan Ryshpan wrote:
> > I am mounting a few filesystems from one F10 machine to another. Mount
> > works rapidly but umount of each of the filesystems takes about 20
> > seconds. Is this normal? Could I have the systems misconfigured in any
> > obvious way? Both machines have x86_64 processors.
> >
> > Here is the file /etc/exports on the server machine:
> > / amito(ro,sync,no_root_squash)
> > and here is the corresponding mount command on the client machine:
> > # mount -t nfs claremont:/ /mnt/claremont
> > Here is a typical umount command on the client machine:
> > # time umount /mnt/claremont/
> > real 0m21.029s
> > user 0m0.001s
> > sys 0m0.004s
> >
> > Any ideas? Thanks - jon
>
> Flushing write data because of sync? Is it equally slow if you just
> mount and immediately unmount with no intervening activity?
There was not activity between the mount and unmount; no other commands
intervened.
jon
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