Load-Balanced Recovery Schemes for Single-Disk Failure in Storage Systems with Any Erasure Code

2013 ◽  
Author(s):  
Xianghong Luo ◽  
Jiwu Shu
Keyword(s):  
Storage Systems ◽  
Erasure Code ◽  
Single Disk ◽  
Recovery Schemes ◽  
Load Balanced ◽  
Disk Failure

scholarly journals Optimal recovery of single disk failure in RDP code storage systems

2010 ◽  
Vol 38 (1) ◽  
pp. 119-130 ◽  
Author(s):  
Liping Xiang ◽  
Yinlong Xu ◽  
John C.S. Lui ◽  
Qian Chang
Keyword(s):  
Storage Systems ◽  
Optimal Recovery ◽  
Single Disk ◽  
Disk Failure

scholarly journals Single Disk Failure Recovery for X-Code-Based Parallel Storage Systems

2014 ◽  
Vol 63 (4) ◽  
pp. 995-1007 ◽  
Author(s):  
Silei Xu ◽  
Runhui Li ◽  
Patrick P.C. Lee ◽  
Yunfeng Zhu ◽  
Liping Xiang ◽  
...  
Keyword(s):  
Storage Systems ◽  
Failure Recovery ◽  
Parallel Storage ◽  
Single Disk ◽  
Parallel Storage Systems ◽  
Disk Failure

Reparo: A Fast RAID Recovery Scheme for Ultra-large SSDs

2021 ◽  
Vol 17 (3) ◽  
pp. 1-24
Author(s):  
Duwon Hong ◽  
Keonsoo Ha ◽  
Minseok Ko ◽  
Myoungjun Chun ◽  
Yoona Kim ◽  
...  
Keyword(s):  
Storage Systems ◽  
Storage System ◽  
Experimental Results ◽  
Huge Amount ◽  
Failure Characteristics ◽  
System A ◽  
Recovery Scheme ◽  
Cost Efficient ◽  
Recovery Schemes ◽  
Multi Core Processor

A recent ultra-large SSD (e.g., a 32-TB SSD) provides many benefits in building cost-efficient enterprise storage systems. Owing to its large capacity, however, when such SSDs fail in a RAID storage system, a long rebuild overhead is inevitable for RAID reconstruction that requires a huge amount of data copies among SSDs. Motivated by modern SSD failure characteristics, we propose a new recovery scheme, called reparo , for a RAID storage system with ultra-large SSDs. Unlike existing RAID recovery schemes, reparo repairs a failed SSD at the NAND die granularity without replacing it with a new SSD, thus avoiding most of the inter-SSD data copies during a RAID recovery step. When a NAND die of an SSD fails, reparo exploits a multi-core processor of the SSD controller in identifying failed LBAs from the failed NAND die and recovering data from the failed LBAs. Furthermore, reparo ensures no negative post-recovery impact on the performance and lifetime of the repaired SSD. Experimental results using 32-TB enterprise SSDs show that reparo can recover from a NAND die failure about 57 times faster than the existing rebuild method while little degradation on the SSD performance and lifetime is observed after recovery.

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