On 04/16/2013 03:50 PM, Max R. Dechantsreiter wrote: > ...Perhaps HPC should be defined problem-down, rather than hardware-up. > > Regarding your "Issue #1:" > > There are some _nearly_ EP problems that require very minimal, but crucial, > communication (perhaps at long intervals). > > As to your "Issue #2:" > > "Owned compute" has some advantages over "rented compute." In general, the > control one has over one's owned resources enables applications to run with > greater performance. Some optimizations just demand root access! >
As someone who has been Scientific Computing/HPC System Admin, I can tell you this is a complete myth. From my experience, the more access users have to the hardware, the worse performance gets! In fact, in my current job at a large university, I've already done my share of cleaning up after people who had control over their owned resources. And don't think this argument really applies to cloud computing, either. It's my understanding that with AWS and other cloud services, you still get root access to your virtualized guesses. -- Prentice _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
