Analytical system tools for iSCSI remote storage access and performance improvement by optimization with the tools

2009 IEEE 3rd International Symposium on Advanced Networks and Telecommunication Systems (ANTS) Pub Date : 2009-12-14 DOI:10.1109/ANTS.2009.5409882

R. Higa, M. Oguchi, Kosuke Matsubara, T. Okamawari, Saneyasu Yamaguchi

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引用次数: 1

Abstract

iSCSI is one of the most popular protocols among the SAN (storage area network) working on an IP network. iSCSI is a standard to encapsulate a SCSI command into a TCP/IP packet, thus we can make an access to a storage system with commoditized IP devices only. In this paper, iSCSI sequential write access for a remote backup system is focused. It is well known that iSCSI experiences performance deterioration under a high latency environment. The storage access by iSCSI has multiple hierarchical protocols. Due to this complicated structure, it is very difficult to identify the performance bottleneck that causes the deterioration. Therefore, system tools which can analyze the complicated layered structure are required. We have developed system tools that enable us to monitor the hierarchical protocols. As a result, we have identified the cause of the iSCSI performance degradation problem. We then fixed the problem and confirmed that one can obtain the performance close to the theoretical limit.

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分析系统工具对iSCSI远程存储的访问，并通过优化工具提高性能

iSCSI是在IP网络上工作的SAN(存储区域网络)中最流行的协议之一。iSCSI是一种将SCSI命令封装到TCP/IP数据包中的标准，因此我们可以仅使用商品化的IP设备访问存储系统。本文主要研究了远程备份系统的iSCSI顺序写访问。众所周知，iSCSI在高延迟环境下会出现性能下降。iSCSI对存储的访问具有多种层次协议。由于这种复杂的结构，很难识别导致性能下降的瓶颈。因此，需要能够分析复杂分层结构的系统工具。我们已经开发了系统工具，使我们能够监视分层协议。因此，我们已经确定了iSCSI性能下降问题的原因。然后我们修复了这个问题，并证实可以获得接近理论极限的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2009 IEEE 3rd International Symposium on Advanced Networks and Telecommunication Systems (ANTS)

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