FIBRE CHANNEL and IP SAN INTEGRATION(13)

The maturity and mission-critical deployment of Fibre Channel (FC) in storage area networks (SANs) creates a unique class of multi-terabit networks with demanding throughput, latency, scalability, robustness, and availability requirements. This paper revie

Figure 8 shows an example of Fast Write, where a 1 MB transfer is negotiated between the source and the left-hand gateway as well as between the two gateways. For the write operations between the final gateway and destination, the maximum block size is specified by the destination. Most of the round-trips required are over the SAN between the right-hand gateway and destination. Therefore, the SAN should have higher bandwidth, lower latency, and lower error rate than the WAN connection between gateways. Fast Write is an innovative method of using standard protocols to leverage the capability of a gateway and leverage TCP protocol benefits over WAN. 5.0 Summary We present several of the critical requirements and best practices for FC SAN deployments. We examine IP SAN technologies and protocols, and show that FC and IP integration works well - integrated SANs are a critical part of today’s data center. We explore how several new high-speed protocol extensions work, and areas that need further research and development. The deployment of high-speed and long-distance networks for data centers (while providing good performance and reliability) is becoming very important and has potential value as well as challenges. Acknowledgements I would like to thank many of the engineers, architects, and researchers who are mentioned in the references and many others who are not explicitly mentioned here. I would like to thank Stuart Soloway for his detailed review and help with this paper. I would also like to thank Tom Clark and Neal Fausset for their review and inputs. References 1. Latest FC standards and drafts can be found at . 2. H. Yang, “Performance Considerations for Large-Scale SANs”, McDATA Corporation, 4 McDATA Parkway, Broomfield, CO 80021, December 2000. . 3. Randy Birdsall, “Competitive Performance Validation Test”, Miercom Labs, Princeton Junction, NJ, June 2002. 4. Stephen Trevitt, “Traffic Patterns in Fibre Channel”, McDATA Corporation, May 2002. Available at . 5. RFC 3643 - Fibre Channel (FC) Frame Encapsulation. . 6. Draft-ietf-ips-iscsi-20.txt, January 19, 2003. . 7. Draft-ieft-ips-fcovertcpip-12.txt, August 2002. . 8. Draft-ietf-ips-ifcp-14.txt, December 2002. . 9. T. Clark, “IP SANs A Guide to iSCSI, iFCP, and FCIP Protocols for Storage Area Networks”, Addison-Wesley, ISBN 0-201-75277-8, October 2002. 10. Draft-ietf-ips-isns-21.txt, October 2003. . 11. Draft-ietf-ips-iscsi-slp-06.txt, December 2003. . 12. K. Meth, J. Satran, “Design of the iSCSI Protocol”, IEEE/NASA MSST2003 Twentieth IEEE/Eleventh NASA Goddard Conference on Mass Storage Systems & Technologies, April 7-10 2003, /2003.113

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