[Beowulf] building Infiniband 4x cluster questions
Shainer at Mellanox.com
Mon Nov 14 00:30:35 PST 2011
FDR adapters are lower latency than the QDR. So you will gain some with QDR, and the most with FDR.
From: beowulf-bounces at beowulf.org [mailto:beowulf-bounces at beowulf.org] On Behalf Of Chris Samuel
Sent: Monday, November 14, 2011 12:26 AM
To: beowulf at beowulf.org
Subject: Re: [Beowulf] building Infiniband 4x cluster questions
On Mon, 14 Nov 2011 03:52:03 PM Gilad Shainer wrote:
> There is some add latency due to the 66/64 new encoding, but overall
> latency is lower than QDR. MPI is below 1us.
Thanks for that. So I'd guess a pair of nodes with QDR cards in the same slot would have lower latency again ?
Christopher Samuel - Senior Systems Administrator VLSCI - Victorian Life Sciences Computation Initiative
Email: samuel at unimelb.edu.au Phone: +61 (0)3 903 55545
Beowulf mailing list, Beowulf at beowulf.org sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
More information about the Beowulf