On Fri, 12 Nov 2004, Keeler, Wayne T (Wayne) wrote:

> 
> Hi,
> 
> I have read many threads regarding replicated hosts for autofs v3 and
> v4. 
> 
> Here is my scenario:
> 
> On a linux host (Opteron running RHEL 3 WS kernel 2.4.21-20.ELsmp, I
> have the following automount configured:
> 
> mountpoint -fstype=nfs,-proto=tcp,ro host1,host2:/tmp/ro
> 
> The goal in my implementation is that after the initial mount occurs to
> host1 or host2, if that particular host fails, nfs will pick up the
> mount on the alternate host. Note that since both mount points are read
> only, this serves as a lower cost, higher availability solution. This
> works on Solaris.

Nop. Not available in Linux.

> 
> I have had no success with this on Linux. It seems that the replication
> only works on the initial mount/rpc call. Once the initial mount occurs,
> it doesn't appear there is any fail-over capability.

Yep. I believe you are correct.

> 
> I have even installed RedHat's Beta version of E4 (kernel
> 2.6.9-1.648_ELsmp). The result is the same. If I crash the machine that
> originally had the mount-point, the end result is a hung mount and
> fail-over never occurs.
> 
> I can't seem to find any information that indicates that this should or
> should not work by design.
> 
> Can someone please definitively tell me if the capability I am seeking
> is available via the autofs supplied by RedHat in Enterprise 3?

I don't think that this is practicle to do in autofs.

This is the source of statements like "this functionality belongs in NFS 
or mount". The limited implementation in autofs is there because of the 
lack of it in NFS.

The question then is "does autofs or mount/NFS handle this in Solaris"?

Mike?

Ian

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