[Beowulf] Mutiple IB networks in one cluster
bill at cse.ucdavis.edu
Tue Feb 4 13:06:12 PST 2014
On 02/01/2014 08:17 AM, atchley tds.net wrote:
> The cross-bar switch only guarantees non-blocking if the two ports are on
> the same line card (i.e. using the same crossbar). Once you start
> traversing multiple crossbars, you are sharing links and can experience
Full backplane means no shared links, even if multiple switches are involved.
Shared links are used when you oversubscribe the uplinks, like with a half or
quarter backplane configuration.
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