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ACM Transactions on Storage (TOS), Volume 7 Issue 3, October 2011

Guest Editorial
André Brinkmann, David Pease
Article No.: 7
DOI: 10.1145/2027066.2027067

Understanding and Improving Computational Science Storage Access through Continuous Characterization
Philip Carns, Kevin Harms, William Allcock, Charles Bacon, Samuel Lang, Robert Latham, Robert Ross
Article No.: 8
DOI: 10.1145/2027066.2027068

Computational science applications are driving a demand for increasingly powerful storage systems. While many techniques are available for capturing the I/O behavior of individual application trial runs and specific components of the storage...

YouChoose: Choosing your Storage Device as a Performance Interface to Consolidated I/O Service
Xuechen Zhang, Yuehai Xu, Song Jiang
Article No.: 9
DOI: 10.1145/2027066.2027069

Currently the QoS requirements for storage systems are usually presented in the form of service-level agreement (SLA) to bound I/O measures such as latency and throughput of I/O requests. However, SLA is not an effective performance interface for...

Reducing Repair Traffic in P2P Backup Systems: Exact Regenerating Codes on Hierarchical Codes
Zhen Huang, Ernst Biersack, Yuxing Peng
Article No.: 10
DOI: 10.1145/2027066.2027070

Peer to peer backup systems store data on “unreliable” peers that can leave the system at any moment. In this case, the only way to assure durability of the data is to add redundancy using either replication or erasure codes. Erasure...

A Hybrid Approach to Failed Disk Recovery Using RAID-6 Codes: Algorithms and Performance Evaluation
Liping Xiang, Yinlong Xu, John C. S. Lui, Qian Chang, Yubiao Pan, Runhui Li
Article No.: 11
DOI: 10.1145/2027066.2027071

The current parallel storage systems use thousands of inexpensive disks to meet the storage requirement of applications. Data redundancy and/or coding are used to enhance data availability, for instance, Row-diagonal parity (RDP) and EVENODD...