Performance Evaluation of 2FT RAID

Performance Evaluation of 2FT RAID
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2FT RAID性能评估

DOI:
10.1109/nbis.2011.87
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发表时间:
2011
期刊:
2011 14th International Conference on Network-Based Information Systems
影响因子:
--
通讯作者:
M. Uehara
M. Uehara
中科院分区:
--
文献类型:
--
作者:
Yuji Nakamura;M. Uehara

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最近,对云、生活日志和其他应用程序的大规模在线存储的需求有所增加。在此之前,我们开发了用于构建大规模在线存储的VLSD(Virtual Large-Scale Storage)工具包,使用RAID实现可靠存储。RAID5是常用的,但它不适合大规模在线存储,因为它只提供1级容错(1FT)。目前,许多存储设备采用超过1FT的RAID,如RAID 6。但是,有几个RAID类的容差大于1FT。在以前的工作中,我们开发了另一个2FT RAID,RAID 4PQ,它类似于RAID 6,因为它使用P+Q奇偶校验。但是,它与RAID 6的不同之处在于它具有专用的双奇偶校验。此外,RAID RDP也是2FT RAID,其中2个奇偶校验是行和对角奇偶校验(RDP)。在本文中,我们实现这些RAID类型的VLSD类,并比较它们的性能。
Recently, there has been increased demand for large-scale online storage for clouds, life logs, and other applications. Previously, we developed the VLSD (Virtual Large-Scale Disks) toolkit for constructing large-scale online storage, using RAID to realize reliable storage. RAID5 is commonly used, but it is not adequate for large-scale online storage because it provides only level 1 fault tolerance (1FT). Currently, many storage appliances employ more than 1FT RAID, such as RAID6. However, there are several RAID classes with greater tolerance than 1FT. In previous works, we developed another 2FT RAID, RAID4PQ, which is similar to RAID6 in the sense that it uses P+Q parities. However, it differs from RAID6 in that it has dedicated double parity. Furthermore, RAID RDP is also a 2FT RAID, in which the 2 parities are row and diagonal parities (RDP). In this paper, we implement these RAID types as VLSD classes and compare their performance.
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