It would be nice to have non-blocking communication within the entire system but the critical part is the 36-node complex to be connected to the main cluster.
On Mon, Feb 9, 2009 at 1:33 AM, Gilad Shainer <shai...@mellanox.com> wrote: > Do you plan to have full not blocking communications between the next > systems and the core switch? > > ------------------------------ > *From:* beowulf-boun...@beowulf.org [mailto:beowulf-boun...@beowulf.org] *On > Behalf Of *Ivan Oleynik > *Sent:* Sunday, February 08, 2009 8:20 PM > *To:* beowulf@beowulf.org > *Subject:* [Beowulf] Connecting two 24-port IB edge switches to core > switch:extra switch hop overhead > > I am purchasing 36-node cluster that will be integrated to already existing > system. I am exploring the possibility to use two 24 4X port IB edge > switches in core/leaf design that have maximum capability of 960Gb > (DDR)/480Gb (SDR). They would be connected to the main Qlogic Silverstorm > switch. > > I would appreciate receiving some info regarding the communication overhead > incurred by this setup. I am trying to minimize the cost of IB communication > hardware. It looks like buying single 48-port switch is really an expensive > option. > > Thanks, > > Ivan >
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