Hi,

On Wed, 2006-06-28 at 22:01 +0800, Gerrit Voss wrote:
> Hi,
> 

> 
> which looks like your client stops before calling the IP_MULTICAST_IF
> setsockopt in question.
> 
> 
> I currently have some trouble getting the multicast cluster running on
> our rocks cluster (similar setup 2 nics and a different hostname per
> nic on the head node). I thought I solved the problem but right now it
> is back again.
> 
> I'll have a closer look tomorrow and let you once I solved it.


aaarrrrggg, ok my problems seem to be hardware related ;-((. I hate
switches (this one is from Dell) that seem to have multicast problems 
in unmanaged mode ;-((. Using a different 'S$20' hub seems to do the
trick ;-)

ok, back to your problem, one problem I encountered was having
different hostnames for the internal and external interface.

could you, just for testing force the hostname to be the one
used by your internal nic, especially so that the servers
resolve that name to the internal eth0 address.

basically if your config is 

> eth0 (192.168.0.1 superclient.bar.baz.blah)
> eth2 (foo.bar.baz.blah) 

try 

hostname superclient.bar.baz.blah 

on your client and make sure that your servers can ping
superclient.bar.baz.blah at 192.168.0.1.

alternatively (if your OpenSG is from today) you can try
setenv OSG_HOSTNAME superclient.bar.baz.blah on your client.
But still make sure that the servers resolve superclient.bar.baz.blah
to 192.168.0.1

BTW does the cluster work without multicast ??

If it does and the hostname trick above does not help we have to
dig a little bit deeper.

regards,
  gerrit




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