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Subject: Re: [OMPI users] Printing information on computing nodes.
From: Radomir Szewczyk (radomir.szewczyk_at_[hidden])
Date: 2011-11-14 14:28:52


lets say computing node no. 2 is dual core and uses 2 processes, it
prints out only the solution for lets say no 2 and 3 processes. kinda
if(id == 2 || id == 3) cout << "HW"; the rest ignores this
information. That's what I'm talking about. Thanks for your response.

2011/11/14 Ralph Castain <rhc_at_[hidden]>:
>
> On Nov 14, 2011, at 12:18 PM, Radomir Szewczyk wrote:
>
>> So there is no solution? e.g. my 2 computers that are computing nodes
>> and are placed in different room on different floors. And the target
>> user wants to monitor the progress of computation independently which
>> have to be printed on their lcd monitors.
>
> So...you want stdout/err to be repeated to multiple places? If so, then no - we don't support that, and I don't know anyone who does.
>
>
>>
>> 2011/11/14 Reuti <reuti_at_[hidden]>:
>>> Hi,
>>>
>>> Am 14.11.2011 um 19:54 schrieb Radomir Szewczyk:
>>>
>>>> The problem I'm facing now is how to print information on computing nodes.
>>>> E.g. I've got 10 real computers wired into one cluster with pelicanhpc.
>>>> I need each one of them to print results independently on their
>>>> screens. How To?
>>>
>>> the stdout will be collected by the MPI library and all goes to the terminal where you started the mpiexec.
>>>
>>> First you have to decide, what do you mean by "their screens". As MPI is started  by an SSH connection or alike, there is nothing where it can be output at the first place. They even maybe operated headless.
>>>
>>> Otherwise: is there X11 running on all the nodes, or would it help to write something to the local virtual console like /dev/vcs7 or /dev/console in a text based session?
>>>
>>> -- Reuti
>>>
>>>
>>>> It may be an easy task, but I'm new to this and didn't find proper info.
>>>> Cheers
>>>> Radomir Szewczyk
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