Hi,
I have used ssh for this on such systems. As long as the batch system
gives you exclusive use of the set of compute nodes(usually the case),
you shouldn't have to worry about ports being used by others because the
tunnel is through your ssh connection. It's not automated though. Here
is how I do it:
I use two terminals on my workstation, in the following denoted by t1$
and t2$, say fe is the front end on your cluster. In the first terminal:
t1$ ssh fe
t1$ qsub -I -V -l select=XX -l walltime=XX:XX:XX
XX is replaced by your values. The job starts and you're automatically
ssh'd into some compute node, which we'll say has hostname NODE. In the
second terminal:
t2$ ssh fe
t2$ ~C<enter>
-L ZZZZZ:NODE:YYYYY
The ~C bit is an escape sequence that sets up the port forward. ZZZZZ is
a port number on your workstation. YYYYY is a port number on the server
that is not blocked by the clusters internal firewall (see your sys
admin). Now back to terminal one, and your waiting compute node:
t1$ module load PV3-modulefile
t1$ mpiexec pvserver --server-port=YYYYY
The module is what sets up the ld library path and paths for your
ParaView server install (see your sys admin). now paraview is running on
the cluster. You start the ParaView client locally and connect over port
ZZZZZ on localhost.
That's what I do, if you come up with some automated script though that
would be killer.
Burlen
Bart Janssens wrote:
On Thursday 04 February 2010 07:59:46 pm Rakesh Hammond wrote:
I am no expert on this type of stuff, but I can see how this would work
- the question is if you have multiple users connecting at the same
time, obviously you can't forward everything into 11111 for example.
Hi Rakesh,
If you use reverse connections, the compute nodes only need to be able to
connect to outside machines (i.e. the workstations). Turning on NAT on a
gateway machine, i.e. the frontend, should be sufficient for that, and no port
forwarding is needed. This works on a standard Rocks setup, which enables the
frontend as gateway by default.
Cheers,
Bart
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