【摘要】：為保證數(shù)據(jù)的完整性和可靠性,云存儲(chǔ)中主要采用多副本和糾刪碼兩種存儲(chǔ)策略對(duì)數(shù)據(jù)進(jìn)行冗余保存。針對(duì)單一冗余存儲(chǔ)策略的不足,考慮存儲(chǔ)開(kāi)銷(xiāo)和訪問(wèn)質(zhì)量等方面因素,根據(jù)用戶訪問(wèn)數(shù)據(jù)的規(guī)律,提出一種基于糾刪碼的動(dòng)態(tài)副本冗余存儲(chǔ)方案。采用RC糾刪碼來(lái)存儲(chǔ)云中海量數(shù)據(jù),使用曲線擬合預(yù)測(cè)訪問(wèn)熱度,適時(shí)調(diào)整副本的數(shù)量。實(shí)驗(yàn)結(jié)果表明,該方案空間利用率高,能有效減小用戶訪問(wèn)的平均延遲,提高用戶訪問(wèn)的成功率。
[Abstract]:In order to ensure the integrity and reliability of data, two storage strategies of multi-copy and erasure code are mainly used in cloud storage to preserve data redundancy. Considering the shortcomings of single redundant storage strategy and considering the storage overhead and access quality, a dynamic replica redundancy storage scheme based on erasure codes is proposed according to the rules of user accessing data. RC erasure code is used to store massive data in cloud, curve fitting is used to predict access heat, and the number of copies is adjusted in time. The experimental results show that the proposed scheme has high spatial utilization and can effectively reduce the average delay of user access and improve the success rate of user access.
【作者單位】： 鄭州大學(xué)信息工程學(xué)院;
【分類(lèi)號(hào)】：TP333
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本文編號(hào)：2472594