Delayed partial parity scheme for reliable and high-performance flash memory SSD

Soojun Im, Dongkun Shin
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引用次数: 21

Abstract

The I/O performances of flash memory solidstate disks (SSDs) are increasing by exploiting parallel I/O architectures. However, the reliability problem is a critical issue in building a large-scale flash storage. We propose a novel Redundant Arrays of Inexpensive Disks (RAID) architecture which uses the delayed parity update and partial parity caching techniques for reliable and high-performance flash memory SSDs. The proposed techniques improve the performance of the RAID-5 SSD by 38% and 30% on average in comparison to the original RAID-5 technique and the previous delayed parity update technique, respectively.
延迟部分奇偶校验方案为可靠和高性能闪存SSD
通过利用并行I/O架构,闪存固态硬盘(ssd)的I/O性能不断提高。然而,可靠性问题是构建大规模闪存的关键问题。我们提出了一种新的廉价磁盘冗余阵列(RAID)架构,该架构使用延迟奇偶更新和部分奇偶缓存技术来实现可靠和高性能的闪存ssd。与原始的RAID-5技术和先前的延迟奇偶更新技术相比,所提出的技术将RAID-5 SSD的性能平均提高38%和30%。
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