[Beowulf] Arrival distribution to a typical beowulf system.

Bill Rankin wrankin at ee.duke.edu
Tue Dec 13 07:55:15 EST 2005


On Tue, 2005-12-13 at 02:57, Greg Lindahl wrote:
> On Mon, Dec 05, 2005 at 12:28:01PM +0000, enver ever wrote:
> 
> > Can we assume that the job arrivals to a typical Beowulf system can be 
> > exponential?
> 
> I'm not sure if you're referring to the time that jobs are submitted,
> or their size. Either way, I wouldn't assume a distribution,

>From the examples that we have seen on our cluster, the interarrival
times are definitely not exponential.  Mainly because the use of array
and other types of batch submissions tend to make the arrival rates very
"bursty".  There may well be more complex models that would fit this
traffic pattern, but it is definitely not a simple Lambda.

-bill 


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