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SubjectRe: nfs_statfs: statfs error = 116
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Trond Myklebust <trond.myklebust@fys.uio.no> wrote on 11/14/2003 02:49:31
PM:

> >>>>> " " == Martin Knoblauch <Martin.Knoblauch@mscsoftware.com> writes:
>
> > I accidentally run iozone on two clients with the output file
> > being the same and residing on the NFS Server. Pure luser
> > error, but it produced ESTALE pretty much reproducibly.
>
> Sure. This is a prime example of where ESTALE *is* appropriate. One
> NFS client is deleting a file on the server while the other is still
> using it.
>
> In the NFSv2/v3 protocols, the assumption is that filehandles are
> valid for the entire lifetime of the file on the server. IOW only
> "unlink()" can cause a valid filehandle to become stale. This is
> mainly because there is no notion of open()/close(), so the server
> would never be capable of determining when your client has stopped
> using the filehandle.
>
> If your 2 processes were running on the same machine, you would have
> seen the kernel temporarily rename your file to .nfsXXXXXX in order to
> work around the above problem. Delete that file, and you will generate
> ESTALE reproducibly too....
>
> Cheers,
> Trond
Trond,

cool. Great explanation. Always good if you can get those that know into
talking :-)

Cheers
Martin

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