To: Bill who wrote (17477 ) 7/28/1998 10:36:00 AM From: Lhn5 Respond to of 29386
Ed Frymoyer in an Emulex press release: "The LightPulse LP3000 PCI adapter brings very affordable high-performance throughput for storage intensive applications. Fibre channel is now the technology of choice for gigabit connectivity for storage and clustering applications. The open systems fibre channel adapter market opportunity may exceed $300 million in 1998," said Ed Frymoyer, emf Associates. "By providing aggressive price-performance, Emulex's new single chip fibre channel adapter will be one of the drivers accelerating the transition to fibre channel from SCSI connections," added Mr. Frymoyer. ---------------------------------------------------------- Ed Frymoyer in BYTE Feb 1998: There are other players, as well. One of these is the scalable coherent interface (SCI), from Dolphin Interconnect Solutions. SCI now offers speeds of 500 MBps (1 GBps bidirec tional) and low latencies that are valuable for supporting transaction-oriented applications such as databases. Where SCI achieves a latency of 2 microseconds, FCL might take 20 æs. Yes, But... Each of the alternatives to Fibre Channel has weaknesses. SCSI's technical drawbacks are discussed above. Ethernet may be 30 percent to 50 percent less efficient than Fibre Channel for typical server-to-server applications, says Forrester's Howe. In addition, Fibre Channel provides error handling in the chip. Ethernet doesn't, so you need a software stack, such as TCP/IP, that does. That means high latencies. Furthermore, three years from now, Ethernet chips and Fibre Channel chips will cost about the same for comparable speeds, predicts Ed Frymoyer, president of EMF Associates (Half Moon Bay, CA), a consultancy specializing in Fibre Channel. On a cost-per-Mbps basis, Fibre Channel is already less expensive than Gigabit Ethernet today, he adds. Frymoyer also says that he expects three Fi bre Channel-to-Ethernet bridges within a year. As for SCI, it is a parallel technology, limited to one data center. A serial version, planned for 1999, should greatly increase distances and lower costs. By that time, though, Fibre Channel may be too firmly entrenched, consigning SCI to a niche role. In addition, switched Fibre Channel may have hardware latencies comparable to those of SCI.