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Technology Stocks : The New QLogic (ANCR)
QLGC 16.070.0%Aug 24 5:00 PM EST
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To: Douglas Nordgren who wrote (25782)1/25/2000 1:54:00 PM
From: George Dawson  Read Replies (1) of 29386
 
Don't want to rain on anybody's parade:

But my recall of the events of the past three to four years, show some potential problems with designing the IB switch from an FC perspective. These potential problems are based on current public knowledge of FC applications. I have no knowledge of what is currently being worked on in labs.

Latency - many of the cross connects mentioned as candidates for IB type architectures have latencies in the tens of nanoseconds range. Ancor's current product line has a latency that is 10x greater than this range. In my last correspondence with an FC scientist, I was advised the lowest theoretical latency for a point to point FC connection was about 40-50 ns. FC alliance groups have suggested that latencies are a limiting factor in terms of using FC as a viable processor clustering technology.

Class 1 - don't know what the advantage of this is other than broader engineering expertise. The important protocols discussed are not class dependent and it seems no more likely to me that class 1 would be more important in an IB switch than a standard FC switch.

If there are people at Intel and Agilent with cross connect architecture experience on the cluster side-I see it as a very tight race. I do not believe Ancor's existing patent is on their cross connect architecture, but encourage everyone to read it themselves. There are several crossconnect technologies that have been around for awhile.

George D.
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