Re: [Condor-users] Does stork avoid retransfering data?

[Gabriel Mateescu <gabriel.mateescu@xxxxxxxxx>]

Hi Doug,

Is it possible to express with Makeflow
iterative computations that repeat a set
of steps until some stopping criterion
is met?

Thanks.
Gabriel




On Tue, Jan 11, 2011 at 5:55 PM, Douglas Thain <dthain@xxxxxx> wrote:
> Thomas -
>
> You might consider using Makeflow for this task:
> http://www.nd.edu/~ccl/software/makeflow
>
> The idea is that you express your tasks in Makeflow, submit a bunch of
> 'worker' processes to Condor, and Makeflow will distribute tasks among
> the workers.  If they have some common executables and input files,
> they will be automatically cached at the workers, so you don't have to
> keep transmitting them.
>
> Cheers,
> Doug
>
> On Tue, Jan 11, 2011 at 8:27 AM, Rowe, Thomas <rowet@xxxxxxxxxx> wrote:
>> I have to run a simulation about a thousand times with different seeds.  The
>> simulation executable and data total about 100MB.  This sounds like a job
>> for DAGMan & Stork, because this 100MB collection of files needs to get
>> copied around reliably, and some large output files need to be transferred
>> back to the originating machine reliably.
>>
>>
>>
>> My question: Does Stork and/or DAGMan do anything intelligent about avoiding
>> recopying files?  The input files are identical for all thousand runs; only
>> the seed varies.  But I would like to have Condor manage each run
>> individually.  So does all the data and the executable get copied around a
>> thousand times, cleaned up after each run?  If the thousand reps are child
>> to the Stork job that transfers files in place, does everything just work
>> with no extraneous recopying of input data?
>>
>>
>>
>> Thanks,
>>
>> Thomas Rowe
>>
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