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Re: [Linux-cluster] Cluster NFS operation...



On Tue, 2008-05-27 at 00:56 +0100, Corey Kovacs wrote:

> service name
>      IP Address
>      GFS FS
>           NFS Export
>                NFS Client
> 
> The three services are spread across three of the 5 nodes. Reading the
> man page for clurmtabd reveals that it is supposed to
> maintain the client states and "merge" rmtab entries etc to prevent
> stale filehandles etc.
> 
> The clients are RHEl 4.6 using automounted nfs. The clients are
> requesting nfs ver 3, and tcp, with the hard and intr flags.

> THings seem to work fine for an initial failover, but when I try to
> failback, things hang

* On 2.6 kernels including RHEL4, clurmtabd isn't used.

* TCP takes 0-15 minutes to fail over or failback depending on the I/O
pattern:

https://bugzilla.redhat.com/show_bug.cgi?id=369991

This doesn't happen with UDP.


> 2. Is there a document other than the nfscookbook from R.P. or at
> least a version thats been updated in the last year (if somethings
> changed that is)

The general procedures haven't changed.

-- Lon


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