Parity-Switched Data Placement: Optimizing Partial Stripe Writes in XOR-Coded Storage Systems
Parity-Switched Data Placement: Optimizing Partial Stripe Writes in XOR-Coded Storage Systems
复制标题
奇偶校验交换数据放置：优化异或编码存储系统中的部分条带写入
DOI：
10.1109/tpds.2016.2525770
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发表时间：
2016-11
影响因子：
5.3
通讯作者：
Fu Yingxun
中科院分区：
文献类型：
--
作者：
Shen Zhirong;Shu Jiwu;Fu Yingxun
Erasure codes tolerate disk failures by pre-storing a low degree of data redundancy, and have been commonly adopted in current storage systems. However, the attached requirement on data consistency exaggerates partial stripe write operations and thus seriously downgrades system performance. Previous works to optimize partial stripe writes are relatively limited, and a general mechanism is still absent. In this paper, we propose a Parity-Switched Data Placement (PDP) to optimize partial stripe writes for any XOR-coded storage system. PDP first reduces the write operations by arranging continuous data elements to join a common parity element's generation. To achieve a deeper optimization, PDP further explores the generation orders of parity elements and makes any two continuous data elements associate with a common parity element. Intensive evaluations show that for tested erasure codes, PDP reduces up to 31.9 percent of write operations and further increases the write speed by up to 59.8 percent when compared with two state-of-the-art data placement methods.
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DOI：
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发表时间：
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影响因子：
5.3
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发表时间：
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期刊：
2011 IEEE International Parallel & Distributed Processing Symposium
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