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Subject: Re: [OMPI users] about MPI
From: Íõî£ (wangraying_at_[hidden])
Date: 2010-06-29 21:18:05


Thanks for the feedback.

Rui

2010/6/29 Changsheng Jiang <jiangzuoyan_at_[hidden]>

> I am a learner, too, please correct me.
>
> Changsheng Jiang
>
>
> On Tue, Jun 29, 2010 at 15:44, Íõî£ <wangraying_at_[hidden]> wrote:
>
>> Hi, all
>>
>> I'm now learning MPI, but I'm not clear with the following questions,
>>
>> 1, suppose a MPI program involves several nodes, if one node dead, will
>> the program terminate?
>>
> yes. If you program killed in one node, all another nodes will note that
> and abort. But if you server halt, or, you killed the parent of your
> program(which luanched by mpi runtime) first, then another nodes will wait a
> very long time before exit.
>
>>
>> 2, Is there any possibility to extend or shrink the size of MPI
>> communicator size? If so, we can use spare node to replace the dead node?
>>
> I think no. the message passing model prevent you doing this. the
> distributed program status depends on the dead nodes.
>
>>
>> Thanks in advance and your reply will be highly appreciated!
>>
>> Best Regards,
>> Rui Wang
>>
>>
>> _______________________________________________
>> users mailing list
>> users_at_[hidden]
>> http://www.open-mpi.org/mailman/listinfo.cgi/users
>>
>
>
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>

-- 
Rui Wang
Institute of Computing Technology, CAS,  Beijing, P.R.China