On 10/19/07, Josh <jcarlson2 at gmail.com> wrote: > Hi all, I'd like to brainstorm the following issue for possible causes: > > The Oracle database servers and Oracle Application Server servers we use, use > NFS quite extensively. The database servers especially make use of NFS for > database backups. Periodically the NFS mounts disappear from the servers. > When this occurs, a lot of things can be affected. > > Any ideas as to what could cause this? Could some type of time-out on a > router or firewall be a cause?
If such a timeout occurs on a TCP session, it should be transparently re-established. What does "nfsstat -m </mountpoint>" say the mount options are? You aren't mounting them with the automounter, are you? If file systems are really coming unmounted (not stale, or just otherwise flaky), then I would venture a guess that someone is unmounting them. A dtrace script could likely help track this down. -- Mike Gerdts http://mgerdts.blogspot.com/
