On Thu, Sep 14, 2006 at 08:08:12AM -0400, Scott Atchley wrote: > If, however, you are considering something faster than gigabit > Ethernet, bear in mind that GPFS only can use TCP (as far as I know).
The July 2006 presentation posted to the list about the same time as your email says they're adding IB protocols in the future. I thought that GPFS used to support GM directly? > You will be limited to the performance of the TCP on your > interconnect. If you are using TCP/IP/Ethernet, then expect a very > high CPU load. This is debatable. It is often the case that a large cluster does big I/O (say 10+ GB/s) on so many nodes (1000+) that individual nodes are doing < 100 MB/s. In that case the TCP overhead is not that large. And frequently you're limited by the disk system, not the network. But this depends, of course. -- greg _______________________________________________ Beowulf mailing list, [email protected] To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
