[Linux-cluster] Cluster NFS causes kernel bug

[gordan at bobich.net]

On Tue, 23 Oct 2007, Ward, Timothy - SSD wrote:

> NFS 1.0.9-16 (BAD)
>
> So I am avoiding Fedora and GFS2 until you've had more time to "bake"
> it.
>
> I am reading up on Wendy Chang's NFS linux-cluster postings to
> understand why NFS fail over is not consistent.

What do you mean by "consistent"?

> - Has anyone successfully setup a failover NFS cluster?

You'll have to reveal more about your setup. Are you using a floating IP 
and HA to fail over the NFS service, with GNDB for the mirrored block 
device? A SAN with a shared GFS file system with multiple nodes exporting 
the NFS file system? Or something entirely different?

> - Does nfsv4 work better?  It appears by default fedora6 uses nfsv3
> (tcp) client and is flaky.

NFS over TCP has always been flaky, and from what I've seen NFSv4 is not 
really any better. I'm still using NFSv3 over UDP for everything, as it 
seems most reliable.

Gordan