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Subject: Re: [OMPI users] Fix the use of hostfiles when a username is supplied in v1.5 ?
From: Ralph Castain (rhc_at_[hidden])
Date: 2010-10-22 09:37:24


Well that stinks. I'll take care of it - sorry about that. Guess a patch didn't come across at some point.

On Oct 22, 2010, at 6:55 AM, Olivier Riff wrote:

> Hello,
>
> There was a bug in the use of hostfiles when a username is supplied which has been fixed in OpenMPI v1.4.2.
> I have just installed the v1.5 and the bug seems to come out again : only the first username provided in the machinefile is taken into account.
>
> See mails below for the history.
>
> My configuration :
> OpenMPI 1.5
> Linux Mandriva 2008 x86_64 and Linux RHE x86_64
> machinefile example :
> or985966_at_is209898 slots=1
> realtime_at_is206022 slots=8
> realtime_at_is206025 slots=8
>
> Best regards,
>
> Olivier
>
> ---------- Forwarded message ----------
> From: Ralph Castain <rhc_at_[hidden]>
> Date: 2010/3/11
> Subject: Re: [OMPI users] OPenMpi: How to specify login name in machinefile passed to mpirun
> To: Open MPI Users <users_at_[hidden]>
>
>
> Yeah, it was a bug in the parser - fix scheduled for 1.4.2 release.
>
> Thanks!
> Ralph
>
> On Mar 11, 2010, at 4:32 AM, Olivier Riff wrote:
>
>> Hello Ralph,
>>
>> Thanks for you quick reply.
>> Sorry I did not mention the version : it is the v1.4 (which indeed is not the very last one).
>> I will appreciate if you could make a short test.
>>
>> Thanks and Regards,
>>
>> Olivier
>>
>> 2010/3/10 Ralph Castain <rhc_at_[hidden]>
>> Probably a bug - I don't recall if/when anyone actually tested that code path. I'll have a look...probably in the hostfile parser.
>>
>> What version are you using?
>>
>> On Mar 10, 2010, at 8:26 AM, Olivier Riff wrote:
>>
>>> Oops sorry I made the test too fast: it still does not work properly with several logins:
>>>
>>> I start on user1's machine:
>>> mpirun -np 2 --machinefile machinefile.txt MyProgram
>>>
>>> with machinefile:
>>> user1_at_machine1 slots=1
>>> user2_at_machine2 slots=1
>>>
>>> and I got :
>>> user1_at_machine2 password prompt ?! (there is no user1 account on machine2...)
>>>
>>> My problem is still open... why is there a connection attempt to machine2 with user1 ...
>>> Has somebody an explanation ?
>>>
>>> Thanks,
>>>
>>> Olivier
>>>
>>>
>>> 2010/3/10 Olivier Riff <oliriff_at_[hidden]>
>>> OK, it works now thanks. I forgot to add the slots information in the machinefile.
>>>
>>> Cheers,
>>>
>>> Olivier
>>>
>>>
>>>
>>> 2010/3/10 Ralph Castain <rhc_at_[hidden]>
>>>
>>> It is the exact same syntax inside of the machinefile:
>>>
>>> user1_at_machine1 slots=4
>>> user2_at_machine2 slots=3
>>> ....
>>>
>>>
>>> On Mar 10, 2010, at 5:41 AM, Olivier Riff wrote:
>>>
>>> > Hello,
>>> >
>>> > I am using openmpi on several machines which have different user accounts and I cannot find a way to specify the login for each machine in the machinefile passed to mpirun.
>>> > The only solution I found is to use the -host argument of mpirun, such as:
>>> > mpirun -np 2 --host user1_at_machine1,user2_at_machine2 MyProgram
>>> > which is very inconvenient with a lot of machines.
>>> >
>>> > Is there a way to do the same using a machinefile text? :
>>> > mpirun -np 2 -machinefile machinefile.txt MyProgram
>>> >
>>> > I cannot find the appropriate syntax for specifying a user in machinefile.txt...
>>> >
>>> > Thanks in advance,
>>> >
>>> > Olivier
>>> >
>>> > _______________________________________________
>>> > users mailing list
>>> > users_at_[hidden]
>>> > http://www.open-mpi.org/mailman/listinfo.cgi/users
>>>
>>>
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>>
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