[mpich-discuss] Hydra issues

[Dave Goodell]

On Aug 26, 2009, at 2:45 PM, Scott Atchley wrote:

> On Aug 26, 2009, at 3:39 PM, Pavan Balaji wrote:
>
>>>> However you could use one of the various workarounds for this,  
>>>> such as an LD_PRELOADed setvbuf call: http://lists.gnu.org/archive/html/bug-coreutils/2008-11/msg00164.html
>>> This does not change the behavior.
>>> I am still stumped as to why there is no delay when using  
>>> persistent (launch-mode=2) versus a delay with no proxies (launch- 
>>> mode=1).
>>
>> This works for me. We need to figure out how to make this portable  
>> now.
>>
>> -- Pavan
>
> Thanks for your persistence (no pun intended).
>
> When running with 1,024 ranks, launching via MPD can take several  
> minutes. I am assuming that hydra will launch in seconds.

MPD launches shouldn't be that slow in 1.1.1p1, at least for most  
common process layouts.  Are you still seeing slow MPD launches with  
1.1.1p1 (as opposed to 1.1.0)?

-Dave