On Sat, 2005-01-15 at 07:27 -0500, Hal Rosenstock wrote: > On Fri, 2005-01-14 at 23:10, Ronald G. Minnich wrote: > > Hmm, it's back. I guess I was not patient enough. Not sure when it all got > > back. I will have to time it next time, I assume it won't take 6 hours > > each time :-) > > > > I'm working on making this 256-node cluster work over infiniband only, > > same as our myrinet clusters which are myrinet-only. > > How many 96 port switches ? I'd be curious how long it does take to > initialize this (as I do not have access to a large cluster). Also, > right now I'm pretty sure things are being done without pipelining on so > it is likely slower. More on this later. > Ron has 9 96 port switches, 3 in the spine and 6 leaf switches all based on the InfiniScale II switch ASIC, to make a 288 port fabric. It's not quite a true fat-tree network since there are no spine bypass cards for the older 96 port switch (needed on the leaf switches). This is an interesting test case because Ron's network has a total of 612 switch chips. A 1152 port fat-tree fabric based on InfiniScale III would have 240 switch chips.
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