Server clustering vendor Myricom recently released a host adapter with better performance and availability than the company\u2019s previous adapter.Myricom\u2019s Myrinet clustering technology is popular in high-performance clustering and technical computing environments.The history of clustering is littered with failed attempts. For instance, many observers thought that InfiniBand might take over as the preferred clustering interconnect. Two years ago another start-up with a clustering architecture failed: Giganet, whose Gigabit Ethernet clustering used Remote Direct Memory Access, was bought by Emulex.Several vendors using proprietary clustering technology remain. Among them are Myricom, PolyServe, IBM and Sun.Myricom\u2019s M3F2-PCIXE-2 \u201cE card\u201d is a PCI-X adapter with dual fiber-optic ports. While the E-card is almost twice as fast as the company\u2019s single-port \u201cD-card,\u201d it uses the same application programming interfaces.The firmware on the card distributes packets across the two ports in sending, effectively load-balancing the traffic. On the other end of the bidirectional transmission, packets are reassembled, so the two 250+250M-bit\/sec ports act as one 500+500M-bit\/sec port.High-availability operation is important in the E-card. If, for example, one of the ports fails, communication will continue over the remaining port.Benchmarks on the new cards showed a sustained data rate of 950M bit\/sec.The E-card uses a 64-bit, 133-MHz PCI-X bus. It is available now for $1,200.