The Case for Low-Latency Ethernet: The Evolutionary Step for IPC Consolidation Over 10 Gigabit Ethernet

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Executive Summary

The industry momentum behind Fibre over Ethernet (FCoE) sets some significant precedence that raises questions about what is the best approach for server to server messaging (or inter process communication or IPC) using zero-copy send/receive and remote DMA (RDMA) technologies over Ethernet. The IPC solution available for 10GigE is iWARP and is too complex with CPU overhead and requires complex expensive TCP offload (TOE) solutions not accepted by the Linux and virtualization community. Applying the same business and technical logic associated with SAN consolidation using FCoE, one would conclude that Low-Latency Ethernet (LLE) makes the most sense.

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