Trace system of iSCSI storage access
Trace system of iSCSI storage access
复制标题
iSCSI存储访问跟踪系统
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
M. Kitsuregawa
中科院分区：
文献类型：
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作者：
Saneyasu Yamaguchi;M. Oguchi;M. Kitsuregawa
本文提出了一种IP-SAN访问跟踪方法并给出了其实现。 IP-SAN 和 iSCSI 有望解决基于光纤通道 (FC) 的 SAN 的问题。由于IP-SAN系统中服务器和存储通过TCP/IP层协同通信，因此双方的综合分析对于获得更好的性能具有重要意义。我们提出的系统可以准确地指出当IP-SAN用于远程存储访问时性能下降的原因。在长延迟网络中并行iSCSI访问的实验中，总性能受到iSCSI协议栈中SCSI层的实现中的参数的限制。根据我们的IP-SAN访问跟踪系统获得的结果，修改该层的参数。结果，与默认值情况相比，性能提高了四倍。因此，使用我们的系统可以有效地监控 iSCSI 协议栈中的所有层并执行集成分析。
In this paper, an IP-SAN access trace method is proposed and its implementation is presented. IP-SAN and iSCSI are expected to remedy problems of fibre channel (FC)-based SAN. Because servers and storage cooperatively work with communications through TCP/IP layer in IP-SAN system, an integrated analysis of both sides is considered to be significant for achieving better performance. Our proposed system can precisely point out the cause of performance degradation when IP-SAN is used for a remote storage access. In the experiment of parallel iSCSI access in a long-delayed network, the total performance is limited by a parameter in an implementation of the SCSI layer in the iSCSI protocol stack. Based on the result obtained with our IP-SAN access trace system, the parameter in the layer is modified. As a result, four times performance improvement is achieved compared with the default value case. Thus it is effective to monitor all the layers in the iSCSI protocol stack and execute an integrated analysis, using our system.