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Technology Stocks : The New QLogic (ANCR) -- Ignore unavailable to you. Want to Upgrade?

To: Roy Sardina who wrote (19662)	12/9/1998 7:14:00 AM
From: KJ. Moy	Read Replies (1) \| Respond to of 29386

Roy, thank you for the post. Good stuff. <<<Lets not confuse that with switch throughput which is the maximum amount of traffic that a switch can pass through it's ports (this is typically a function of the memory bandwidth in a memory based switch) It can also be dependent on backplane bandwidth in switches with blades and backplanes. In a sixteen port FC switch, 16 Gigabits is the max throughput needed since eight ports would be input and eight would be output.>>> Switch/fabric latency will hinder throughput. When more ports in a fabric need to establish connection with other ports, ports will be subjected to many 'interrupts'. When the port size and load of a fabric increases, throughput measured over time will be less than 1 gbps per port. What I meant was throughput through measurement. We all know in real life 16 Gigabits max throughput in a 16 port switch or 64 Gigabits in a 64 port fabric can 'NEVER' be achieved. <<<Now in a Fabric you put switches in cascade (E-Port) and you choose the number of hops that will be allowed in the fabric (for example 3 is the number that comes to mind) using 16 port switches that's a couple of hundred usable ports. That means a 2 microsecond latency gives you 8 microseconds of latency in the fabric. (three hops means there are 4 switches end to end). NOw the real bottleneck in these fabrics is the single Gigabit link between the switches because if several ports on a swtich want to send data from that switch to another across the fabric then the link between them because the slowest point. That now becomes a blocking fabric. >>> Besides the limitation of 'link capacity' between switches, maximum latency between ports of a 64 ports fabric will be higher than 8 microseconds if each switch has latency of 2 microseconds . Again, please use measurement instead of straight linear calculation. BTW, can you give us an update on your post to Walter back in June. Has Brocade bag IBM's storage division? Thanks. <<<<To: Walter Jacquemin (16649 ) From: Roy Sardina Wednesday, Jun 17 1998 10:52PM ET Reply # of 19659 I hate to dampen spirits but I heard that Brocade will announce an IBM Storage FC Switch win VERY soon. Roy Sardina >>>> KJ

To: Roy Sardina who wrote (19662)	12/12/1998 8:15:00 AM
From: KJ. Moy	Read Replies (1) \| Respond to of 29386

Roy, Competition in the OEM spaces are fierce. How does G2 plan to compete as an independent company? It seems Gadzooz and Vixel are getting all the business. What do you think of the relationship of Vixel and Compaq? I thought Vixel had Compaq locked up with their earlier announcement of a 50M deal with Compaq. In later Compaq news, Gadzooz seems to have included in the news but not Vixel. Is the market trending toward 'managed hub'? I've heard Brocade won CMNT. Do you think Brocade will win Dell also? What happened to Brocade and SUNW? I thought by now they would have announced some kind of deals. Besides our difference in opinions on Latency, do you agree Ancor's claim on having the 'lowest switch latency'. Sorry with all these questions. I have no one else with your knowledge to ask. Thanks. KJ