iSCSI analysis system and performance improvement of iSCSI sequential access in high latency networks

Authors:
Saneyasu Yamaguchi;Masato Oguchi;Masaru Kitsuregawa
Affiliations:
The University of Tokyo, Tokyo, Japan;Ochanomizu University, Tokyo, Japan;The University of Tokyo, Tokyo, Japan
Venue:
HiPC'05 Proceedings of the 12th international conference on High Performance Computing
Year:
2005

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Abstract

IP-SAN and iSCSI are expected to remedy the problems of FC-based SAN. iSCSI has a structure of multilayer protocols. A typical configuration of the protocols to realize this system is as follows: SCSI over iSCSI over TCP/IP over Ethernet. Thus, in order to improve the performance of the system, it is necessary to precisely analyze the complicated behavior of each layer. In this paper, we present an IP-SAN analysis tool that monitors each of these layers from different viewpoints. By using this analysis tool, we experimentally demonstrate that the performance of iSCSI storage access can be significantly improved by more than 60 times.