[petsc-users] debugging with no X11 available

[Dominik Szczerba]

Dear all,

Many thanks for your suggestions, but there is one fundamental
obstacle: there is no mpiexec available at all, everything must go
through a scheduler.

I will see into what Satish proposed, i.e. to first get hold of known
nodes. But I am afraid this may fail, because these run some very
limited system.

Regards,
Dominik

On Mon, Dec 12, 2011 at 2:21 PM, Satish Balay <balay at mcs.anl.gov> wrote:
> On Mon, 12 Dec 2011, Matthew Knepley wrote:
>
>> On Mon, Dec 12, 2011 at 7:11 AM, Dominik Szczerba <dominik at itis.ethz.ch>wrote:
>>
>> > Thanks for your answers. Meanwhile I clarified the situation a bit:
>> >
>> > I can bring xterm up manually from the command line, but the job is
>> > run using a scheduler (slurm). It then gets executed on arbitrary
>> > nodes (some stripped down linux) which apparently can not make X11
>> > connections.
>> >
>>
>> Sometimes you can set the env on the compute nodes, and get DISPLAY right.
>
>
> With compute nodes -its not easy. Even if they have X11 installed - you
> might have to do multiple things:
>
> 1. allocate nodes
> 2. create ssh-x11 tunnels to each node thats allocated [and hope its the same localhost:10 value]
> 3. Now start up the parallel job with this display
>
> mpiexec -n 4 ./ex2 -start_in_debugger -display localhost:10
>
> Satish
>