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ACM Transactions on Storage (TOS), Volume 11 Issue 2, March 2015

SmartCon: SmartCon: Smart Context Switching for Fast Storage Devices
Jongmin Gim, Taeho Hwang, Youjip Won, Krishna Kant
Article No.: 5
DOI: 10.1145/2631922

Handling of storage IO in modern operating systems assumes that such devices are slow and CPU cycles are valuable. Consequently, to effectively exploit the underlying hardware resources, for example, CPU cycles, storage bandwidth and the like,...

Visualizing Block IO Workloads
Ohad Rodeh, Haim Helman, David Chambliss
Article No.: 6
DOI: 10.1145/2651422

Massive block IO systems are the workhorses powering many of today’s largest applications. Databases, health care systems, and virtual machine images are examples for block storage applications. The massive scale of these workloads, and the...

Data Sorting in Flash Memory
Chin-Hsien Wu, Kuo-Yi Huang
Article No.: 7
DOI: 10.1145/2665067

Because flash memory now provides an economical solution for various portable devices and embedded systems, an NAND flash-based storage system has replaced the hard disk drive in many applications. Recently, the implementation of database systems...

Design Tradeoffs of SSDs: From Energy Consumption’s Perspective
Seokhei Cho, Changhyun Park, Youjip Won, Sooyong Kang, Jaehyuk Cha, Sungroh Yoon, Jongmoo Choi
Article No.: 8
DOI: 10.1145/2644818

In this work, we studied the energy consumption characteristics of various SSD design parameters. We developed an accurate energy consumption model for SSDs that computes aggregate, as well as component-specific, energy consumption of SSDs in...

Rebuttal to “Beyond MTTDL: A Closed-Form RAID-6 Reliability Equation”
Ilias Iliadis, Vinodh Venkatesan
Article No.: 9
DOI: 10.1145/2700311

A recent article on the reliability of RAID-6 storage systems overlooks certain relevant prior work published in the past 20 years and concludes that the widely used mean time to data loss (MTTDL) metric does not provide accurate results. In this...

An Energy-Efficient and Reliable Storage Mechanism for Data-Intensive Academic Archive Systems
Tseng-Yi Chen, Hsin-Wen Wei, Tsung-Tai Yeh, Tsan-Sheng Hsu, Wei-Kuan Shih
Article No.: 10
DOI: 10.1145/2720021

Previous studies proposed energy-efficient solutions, such as multispeed disks and disk spin-down methods, to conserve power in their respective storage systems. However, in most cases, the authors did not analyze the reliability of their...