頁籤選單縮合
題名 | 以物件群組分析網頁代理伺服器之快取效能=Analyzing the Cache Performance of Web Proxy Server with Object Groups |
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作者 | 段裘慶; 楊鍵樵; | 書刊名 | 臺北科技大學學報 |
卷期 | 34:1 2001.03[民90.03] |
頁次 | 頁109-122 |
分類號 | 448.6 |
關鍵詞 | 網頁代理伺服器; 快取效能; 網頁物件特徵; 替換換策; Web proxy server; Cache performance; Web object property; Replacement policy; |
語文 | 中文(Chinese) |
中文摘要 | 有鑑於網頁代理伺服器之快取效能對現行WWW之服務品質具有關鍵性的影響,所以本研究擬以"網頁物件特徵"作觀察面;以"網頁物件群組"為觀察點,來分項評量系統的快取效能。作法上,物件特徵概分為「Http狀態碼」、「内容型式」、「資料量大小」與「下傳時間」等四個層面;而物件群組是依單項物件特徵再作分群,以約5~7個群組為主。再配合為網頁群組所定義的三項評估因子,包括群組總存取比(ω□)、群組總命比(□)與群組命中率基準差(△□)等,以對校園代理伺服器作快取效能分析,期望研判出影響本地快取效能的關鍵要素。 由分析所得之統計資料,於實務上可望供區域網管人員作為案例參考藉以微調網内代理伺服器的快取系統組態;另於理論上,則對致力於網頁快取替換策略制定的研究人員可提供新的分析數據與思惟方向藉以研定更高效能的快取機制。 |
英文摘要 | Based on the facts, the cache performance of web proxy server had critically impacted on the quality of service (QoS) of World Wide Web (WWW). In this paper, we will propose and analytical way to investigate the factors affecting the cache performance by analyzing the on-line access logs supported by NTUT. Four facets of web objects including "Http code", "content type", "object size", and "elapsed time" will be used for examining the cache performance. Moreover, in each facet, all cached objects would be partitioned into 5-7 groups for performing the analysis. In the analysis, we use three kinds of evaluation including "access percentage", "hit percentage", and "hit ratio difference" to explore the cache performance, and to find out the critical causes that affect the performance. Finally, we expect that the results of analysis could contribute in two folds. In practice, it could help the administrators of LAN to adapt the cache configuration of proxy server effectively. In theory, it could assist the researchers to study the cache mechanism and construct a novel and more efficient replacement policy. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。