本文關鍵詞：混合頁緩存系統(tǒng)的性能建模與分析　出處：《中國科學技術大學》2017年碩士論文　論文類型：學位論文

  更多相關文章： 非易失存儲介質 混合頁緩存系統(tǒng) 隨機過程 平均場分析

【摘要】：近年來,高性能計算和大數據分析的發(fā)展對頁緩存系統(tǒng)的容量要求越來越高,然而動態(tài)隨機存儲器(Dynamic Random Access Memory,DRAM)由于價格昂貴和擴展性差等問題限制了頁緩存的大規(guī)模擴充,所以一些研究人員提出結合非易失性存儲介質(Non-volatile Memory.NVM)來構建大規(guī)模的混合頁緩存系統(tǒng)。但是,從經濟和技術的角度來看,NVM的加入是否能夠提高頁緩存系統(tǒng)的性能仍是一個值得探討的問題�；卮疬@個問題的關鍵是,結合NVM和DRAM在訪問性能和價格方面的差異來考慮如何設計混合頁緩存系統(tǒng)。本文提出了混合頁緩存系統(tǒng)的分析模型,從而分析不同的設計選擇對混合頁緩存系統(tǒng)的性能影響。我們主要考慮了以下幾個設計選擇:(1)不同的架構選擇——平行架構和分層架構,(2)不同的緩存替換策略選擇,以及(3)不同的存儲設備容量配置。為了分析混合頁緩存系統(tǒng)的性能,我們刻畫了頁緩存系統(tǒng)的訪問請求模型,然后使用馬爾科夫過程來描述在不同的設計選擇下的頁緩存狀態(tài)分布的變化并推導出了穩(wěn)定時的狀態(tài)分布,同時為了解決計算效率問題,我們使用平均場理論來近似對穩(wěn)定時狀態(tài)分布求解,并分別通過理論分析和實驗驗證證實了近似過程的可靠性。隨后為了評估混合頁緩存的性能,我們定義了一個基于訪問延遲的頁緩存性能評判標準�；诖四Ｐ�,我們通過數值分析學習了如何合理地設計頁緩存系統(tǒng),以實現在頁緩存系統(tǒng)的"高吞吐量"和"高靈活性"之間做一個良好地權衡。特別地,我們選擇PCM作為非易失存儲介質的一個實例進行數值分析,分析結果表明,即使在當前的PCM的性價比下,頁緩存系統(tǒng)中加入PCM介質已經可以提高系統(tǒng)性能,且選擇"平行架構"更有利于對性能的優(yōu)化。而隨著PCM技術的發(fā)展,特別是寫性能得到飛速提升時,分層架構會表現出明顯的優(yōu)勢。
[Abstract]:In recent years, the development of high performance computing and large data analysis requires the capacity of page cache system more and more. Dynamic Random Access Memory, however. DRAM) limits the large-scale expansion of page caching due to problems such as high prices and poor scalability. So some researchers proposed a combination of non-volatile memory. NVM-based non-volatile storage media to build large-scale hybrid page caching systems. Whether the addition of NVM can improve the performance of the page caching system from an economic and technical point of view is still a question worth discussing. The key to answer this question is. Considering the differences between NVM and DRAM in terms of access performance and price, we consider how to design a hybrid page cache system. So we analyze the impact of different design choices on the performance of hybrid page caching system. We mainly consider the following design options: parallel architecture and hierarchical architecture. In order to analyze the performance of the hybrid page cache system, we describe the access request model of the page cache system. Then the Markov process is used to describe the change of the state distribution of the page cache under different design choices, and the stable state distribution is deduced to solve the problem of computational efficiency. We use the mean field theory to approximate the steady state distribution, and verify the reliability of the approximate process by theoretical analysis and experimental verification, and then to evaluate the performance of mixed page cache. We define a page cache performance evaluation standard based on access delay. Based on this model, we learn how to design the page cache system reasonably by numerical analysis. In order to achieve a good trade-off between "high throughput" and "high flexibility" of a page cache system. In particular, we chose PCM as an example of a non-volatile storage medium for numerical analysis. The analysis results show that even under the current PCM performance-price ratio, the addition of PCM media to the page buffer system can improve the performance of the system. With the development of PCM technology, especially with the rapid improvement of write performance, hierarchical architecture will show obvious advantages.
【學位授予單位】：中國科學技術大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP333

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相關期刊論文 前1條

1 吳章玲;金培權;岳麗華;孟小峰;;基于PCM的大數據存儲與管理研究綜述[J];計算機研究與發(fā)展;2015年02期

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本文編號：1430301