From mboxrd@z Thu Jan  1 00:00:00 1970
From: John Simon <tzzhc4@yahoo.com>
Subject: Re: Has replicated mount failover  been implemented?
Date: Thu, 11 Oct 2007 20:18:39 -0700 (PDT)
Message-ID: <430834.18700.qm@web81808.mail.mud.yahoo.com>
References: <470E7FDB.5090202@redhat.com>
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To: Peter Staubach <staubach@redhat.com>
Cc: autofs@linux.kernel.org

We have two pairs of VCS HA-NFS servers (one in each
data center), so each entry in auto_appl is the VIP
for the HA pair. Should one portion of the cluster in
the data center local to the compute engines fail it
will just fail over to the other cluster node and
client-side failover would not be used. If however the
entire cluster fails or is unavailable for whatever
reason the duplicate VCS HA-NFS server in the other
data center resumes serving data, albeit at a slightly
slower rate due to latency over the MAN. This site to
site failover is where we currently depend on Solaris
client-side failover.

--- Peter Staubach <staubach@redhat.com> wrote:


> I don't think that I understand what the client side
> failover
> of Solaris was being used for in this configuration.
>  If the
> server is truly HA, then shouldn't the NFS service
> be able to
> failover from one server to the next with minimal
> interruption
> on the clients?
> 
> The Solaris client side failover required relooking
> up all
> file handles which referred to the dead server, so
> it wasn't
> cheap either.
> 
>     Thanx...
> 
>        ps
> 



       
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