[GE users] Qmake and ssh accounting

Heywood, Todd heywood at cshl.edu
Thu Jun 7 14:17:18 BST 2007


Thanks, I am aware of that, but I'm trying to make sense of past/current
accounting of qmake (-pe make) jobs. So I was just asking 2 questions about
how I can reason about the wallclock times given by qmake, for the 2 modes.

Thanks,

Todd


On 6/6/07 5:40 PM, "Rayson Ho" <rayrayson at gmail.com> wrote:

> You can try the "Tight SGE-SSH integration", which is new in SGE 6.1:
> 
> http://gridengine.sunsource.net/servlets/BrowseList?list=dev&by=thread&from=48
> 89
> 
> Rayson
> 
> 
> 
> On 6/6/07, Heywood, Todd <heywood at cshl.edu> wrote:
>> We have configured qrsh to use ssh instead of rsh because we ran into the
>> port number limitation when running large parallel jobs using qmake. I
>> understand this means that any qrsh call will only account for wallclock
>> time. Anyway, the qmake man page says:
>> 
>>> qmake  has  two  different modes for allocating Grid Engine resources for
>>> the
>>> parallel execution of tasks:
>>> 
>>> 1. Allocation of resources using a parallel environment. If the -pe option
>>> is
>>> used  on  the qmake command line, a parallel job is scheduled by Grid
>>> Engine.
>>> The make rules are executed as tasks within this parallel job.
>>> 
>>> 2. Dynamic allocation of resources. If no parallel environment is requested
>>> when  submitting a qmake job, each make rule will generate an individual
>>> Grid
>>> Engine qrsh job.  All resource requests given to qmake will be  inherited by
>>> the jobs processing the make rules.
>> 
>> Two questions. First, does (1), using -pe make, use qrsh underneath? Does
>> qacct thus account for the wallclock time of the whole parallel job (and not
>> a sum of the times of the tasks making up the parallel job)?
>> 
>> Second, does (2) in effect result in qacct giving the total sum (wallclock)
>> time of all the individual tasks (qrsh jobs)?
>> 
>> Thanks,
>> 
>> Todd
>> 
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