Re: nfsd, rmtab, failover, and stale filehandles

[Garrick Staples <garrick@usc.edu>]

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On Thu, May 06, 2004 at 12:13:52PM -0700, Garrick Staples alleged:
> On Thu, May 06, 2004 at 11:56:03AM -0700, Garrick Staples alleged:
> > I'm trying to get a pair of NFS failover servers working correctly.  I've got
> > all heartbeat scripts worked out, the common storage, IP takeover, etc.  The
> > only problem I have now is random stale filehandles after a failover.
> > Sometimes it works, sometimes it doesn't.
> > 
> > I was originally trying to doctor up rmtab and carry over the mount info to the
> > second server, but according to recent docs, rmtab is no longer used and NFS
> > requests should simply always work, as long as the filesystem is exported to
> > the client hosts.
> 
> Btw, I'm using linux 2.6.5, glibc 2.3.2, and nfs-utils 1.0.6.

I'm at a total loss.  Everything I'm reading tells me that all I need to ensure
is that fs device names are the same on both servers so that the generated
filehandles are the same, and that I need to move all lines matching
":$mountpoint:" in rmtab to the new server.  The former is done since I'm using
persistant device numbers with lvm.  The latter shouldn't be needed because I'm
using the "new" proc interface with 2.6.5.

rmtab definitly doesn't do any noticable difference.  I can add random text
and blank it out with no noticable difference on the clients.

Is this a client problem?  The clients are all 2.4.24 and 2.4.26.

All clients and servers are using vanilla kernels.

-- 
Garrick Staples, Linux/HPCC Administrator
University of Southern California

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