[mpich-devel] about MPI hydra process management

[unix haha]

^__^

Many thanks! Pavan

On Wed, Jul 1, 2015 at 7:59 PM, Balaji, Pavan <balaji at anl.gov> wrote:

>
>  We are not very good at names.  :-)
>
>  "persist" is for a "persistent daemon", which makes no sense, since sshd
> is a persistent too.
>
>  "bss" stands for "bootstrap server", and the name conflict is
> unfortunate.
>
>    -- Pavan
>
>   From: unix haha
> Reply-To: "devel at mpich.org"
> Date: Tuesday, June 30, 2015 at 9:35 PM
> To: "devel at mpich.org"
> Subject: Re: [mpich-devel] about MPI hydra process management
>
>    Thanks, Balaji.
>
>  I took a quick look on persist bootstrap. It seems what I want and I will
> try it.
>
>  one thing puzzles me is what's "persist" means here for hydra. what's
> means for hydra_bss_persist in Makefile.mk under hydra/tools/bootstrap/?
> the bss is the .bss section in executable file?
>
>  Thanks!
>
> On Wed, Jul 1, 2015 at 7:29 AM, Balaji, Pavan <balaji at anl.gov> wrote:
>
>>
>>  Hydra supports a bunch of daemon processes, including ssh.  There is a
>> daemon process included with MPICH called "persist", which you could use
>> for this purpose, but it's not really maintained.  You could try it.
>>
>>    -- Pavan
>>
>>   From: unix haha
>> Reply-To: "devel at mpich.org"
>> Date: Tuesday, June 30, 2015 at 6:18 PM
>> To: "devel at mpich.org"
>> Subject: [mpich-devel] about MPI hydra process management
>>
>>   Hi, all:
>>
>>      I'm working on port the MPICH2 3.1.4 to an embedded environment. I
>> met some problems for hydra process management, Could anyone help me?
>>
>>      1. For the old MPD, before the mpirun, there's a daemon process
>> running on all computer nodes. But I don't see what's hydra's daemon
>> process in the current MPI document. Could you give me some hints?
>>
>>       2. As we run the MPICH2 in a resource constraint environment, the
>> SSH or the other linux-based launcher may not be used. Does it exist any
>> simple launcher running on the computer nodes before the mpiexec?
>>
>>       3. What's my understanding for hydra is: once the Launcher process
>> running on all computer nodes, I can use the mpiexec on the control node to
>> start the parallel jobs? If so, the problem is: Could I start the Launcher
>> process manually if there's no linux-based launcher?
>>
>>        Thanks!
>>
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