Re: file open for write fails under stress

[Trond Myklebust <trond.myklebust@fys.uio.no>]

On Tue, 2008-10-14 at 15:49 +0200, Omry Yadan wrote:
> Trond Myklebust wrote:
> 
> > On Tue, 2008-10-14 at 00:51 +0200, Omry Yadan wrote:
> >   
> >> I have an application that open many files for writing very fast, in a
> >> way - it can almost be looked as a file system stress test.
> >>
> >>
> >> my application is single threaded, and I noticed the following problem
> >> when running a single instance of it:
> >>
> >>
> >> at some point, after opening (and closing) many files for writing, the
> >> application fails to open a file for writing.
> >>
> >> if I sleep for 1 second and try again, it works.
> >>     
> >
> > What version of nfs, filesystem on the server, export options, mount
> > options,...?
> >
> >   
> 
> /etc/exports:
> /var/vizi 38.99.126.160/28(rw,sync,no_subtree_check)
> server file system : ext3 on a raid5 (900gb, 3x500gb hd).
> server nfs version: 1.0.10

> client mount:
> nas1:/var/vizi on /var/vizi type nfs (rw,tcp,addr=38.99.126.163)

So I assume it is NFS version 3, then?

What error does the application get when the open() fails?

Cheers
  Trond