The advent of 10 Gbps Ethernet (10 GbE) bodes well for iSCSI. With Dynamic TCP Offload added to 10 Gbps adapters running iSCSI, users will see the benefits -- higher performance and access -- of removing TCP processing from the host computer and placing it on a dedicated host bus adapter (HBA) from vendors such as Alacritech, Neterion and NetXen. Dynamic TCP Offload takes advantage of Microsoft's TCP Chimney Offload technology that offloads the TCP stack to the network card.According to the Stamford, Conn.-based market research group Gartner, iSCSI is expected to be a $2 billion market by 2010. In addition, Framingham, Mass.-based IDC estimates that from now through 2010, iSCSI storage-area networks (SANs) will show a compound annual growth rate of 74.8% for worldwide revenue vs. 4.1% for Fibre Channel (FC). IDC also claims the iSCSI protocol will capture more than 10% of storage systems revenue and an even greater percentage of capacity by 2008. Jim Bollinger, systems and network engineer at Washington and Lee University in Lexington, Va., installed Overland Storage's REO disk-based appliances to back up his storage environment. Bollinger, who uses QLogic HBAs that perform both TCP and iSCSI offload, said he'll migrate to 10 Gbps Ethernet for the trunks between university buildings. "iSCSI has been capable of doing everything we need it to do," Bollinger said. "You could take iometer.exe and take the array right up to 100 Mbps. It's every bit as good as local
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Material used for this article originally appeared in Storage magazine.