| Publisher | USENIX Association | ||
|---|---|---|---|
| Format | 139.1KB PDF | Date added | 02 Apr 2003 |
| Topics | Removable Storage, NAS | ||
| Downloads | 193 | ||
The performance of high-speed network-attached storage applications is often limited by end-system overhead, caused primarily by memory copying and network protocol processing. This paper examines alternative strategies for reducing overhead in such systems. The paper considers optimizations to Remote Procedure Call (RPC)-based data transfer using either Remote Direct Memory Access (RDMA) or network interface support for pre-posting of application receive buffers. The paper demonstrates that both mechanisms enable file access throughput that saturates a 2Gb/s network link when performing large I/Os on relatively slow, commodity PCs. However, for multi-client workloads dominated by small I/Os, throughput is limited by the per-I/O overhead of processing RPCs in the server.
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