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題名 | A Bottleneck Analysis Approach to Performance-Oriented Design Choice for Disk Array Systems=用瓶頸分析法對磁碟陣列系統進行效能導向設計 |
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作者 | 李烱三; Lee, Chiung-san; |
期刊 | 國立臺北護理學院學報 |
出版日期 | 19970600 |
卷期 | 5 1997.06[民86.06] |
頁次 | 頁87_1+87_2+89-117 |
分類號 | 471.65 |
語文 | eng |
關鍵詞 | 瓶頸分析; 磁碟陣列系統; 效能導向設計; Bottleneck analysis; Disk array system; Performance-oriented design; |
中文摘要 | 這篇文獻發表一個瓶頸分析法,可用於磁碟陣列系統上以進行效能導向之設計。一般磁碟陣列系統可分成四個主要的次系統:包括磁碟快取記憶體,智慧式的磁碟陣列控制器,I/O匯流排,及磁碟機裝置。此分析法是利用“次系統的平均讀寫時間”來分析那個次系統是瓶頸所在,進而分析造成該瓶頸的原因,並提出改善方案。此外,全部次系統上的讀寫衝撞及分裂╱結合同步等特性也被考慮在此磁碟陣列系統的效能模型中。同時,對分裂╱結合同步的敏感度進行分析。結果顯示:(1)主要的設計參數,如磁碟快取記憶體大小及I/O匯流排頻寬,不只關係於次系統的效能,亦關係於次系統間的交互作用,(2)I/O匯流排頻寬需“5 Mbytes/sec為每部磁碟機”才足夠於每部磁碟機上裝有1 M byte快取記憶的資料傳輸,(3)分裂╱結合同步對“I/O 匯流排頻寬”及“每部磁碟機上快取記憶體大小”非常敏感,但對“智慧式磁碟陣列控制器上的快取記憶體大小”非常不敏感。 |
英文摘要 | A bottleneck analysis approach is proposed for the performance-oriented design of disk array systems. The approach divides a large system into several subsystems (e.g. cache, disk array controller, SCSI-like I/O bus, and disk device) and model for each of them the mean access time per request. A subsystem with the longest mean access time per request is the one that limits whole throughput and creates a bottleneck. Moreover, the approach facilitates more refined analysis on the mean access time per request to help identify the cause of the bottleneck. Example analytical model of particular disk array architecture is developed to illustrate the key ideas of the proposed approach. Accessing conflicts in each subsystem, fork/join synchronization, as well as parameter's sensitivity is also considered in the model and our experiments. Moreover, the model is validated by statistical simulations, fed with a given set of representative workloads, and then used to conduct performance evaluation for some design choices, such as cache sizes, I/O bus bandwidths. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。