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Subject: Re: [OMPI users] Open-MPI 1.3 and environment variables
From: jody (jody.xha_at_[hidden])
Date: 2009-01-20 10:47:42


Thanks for the clarification.
Speaking of 'printenv' - i noticed that
even though $HOSTNAME is set on all of my machines:

 aim-nano_03 ~ # echo $HOSTNAME
 aim-nano_03

it does not appear in printenv's output:
  aim-nano_03 opt # printenv | grep HOST
  aim-nano_03 opt #
Is there something special about $HOSTNAME and how or when it is set?

Jody

On Tue, Jan 20, 2009 at 3:26 PM, Ralph Castain <rhc_at_[hidden]> wrote:
> That was never an envar for public use, but rather one that was used
> internal to OMPI and therefore subject to change (which it did). There are a
> number of such variables in the system - we try to indicate this by not
> exposing them via ompi_info. Of course, you can independently discover them
> with a printenv, but we would not recommend relying on them.
>
> The list of reliable envars is provided here:
>
> http://www.open-mpi.org/faq/?category=running#mpi-environmental-variables
>
> Note that this begins with 1.3 and does not apply to any prior releases.
>
> Ralph
>
>
> On Jan 20, 2009, at 4:43 AM, jody wrote:
>
>> Under 1.2.8 i could check
>> OMPI_MCA_ns_nds_vpid
>> to find out the process rank.
>> Under 1.3 that variable does not seem to exist anymore.
>> Is there an equivalent to hat variable in 1.3?
>> Have any other environment variables changed?
>>
>> Thank You
>> Jody
>> _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>
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