LAM is unlikely to work in firewalled environments. You need to have full
TP and UDP connectivity between all nodes for LAM to function properly.
On 9/22/06 9:00 PM, "Chuming Chen" <chumingchen_at_[hidden]> wrote:
> Dear LAM list.
>
> I am trying to set up R SNOW on Rocks cluster with LAM/MPI installed.
>
> cl <- makeCluster(2, type = "MPI") was the R command I used to create a
> cluster. When /opt/lam/gnu/etc/lam-bhost.def contains only "localhost",
> everything is fine. But once I add compute nodes to that file, it just
> would return back to R prompt.
> I can see lamboot successfully and lamd running on the compute nodes
> when I run this command. I wonder whether there is something related to
> the lam's configuration. Would the firewall on compute nodes block the
> further communication. I think lamboot use ssh, but later communication
> may not be the ssh traffic.
>
> Do I need to have lam-bhost.def on all the compute nodes with the same
> entries?
>
> Thank you for your help.
>
> Chuming
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--
Jeff Squyres
Server Virtualization Business Unit
Cisco Systems
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