NDLI: Using MEMS-based storage in disk arrays (2003)

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Using MEMS-based storage in disk arrays (2003)

Content Provider	CiteSeerX
Author	Uysal, Mustafa Merchant, Arif Alvarez, Guillermo A.
Description	Conference on File and Storage Technologies (San Francisco, CA, 31 March–2 April 2003). USENIX Association
Abstract	Current disk arrays, the basic building blocks of highperformance storage systems, are built around two memory technologies: magnetic disk drives, and non-volatile DRAM caches. Disk latencies are higher by six orders of magnitude than non-volatile DRAM access times, but cache costs over 1000 times more per byte. A new storage technology based on microelectromechanical systems (MEMS) will soon offer a new set of performance and cost characteristics that bridge the gap between disk drives and the caches. We evaluate potential gains in performance and cost by incorporating MEMS-based storage in disk arrays. Our evaluation is based on exploring potential placements of MEMS-based storage in a disk array. We used detailed disk array simulators to replay I/O traces of real applications for the evaluation. We show that replacing disks with MEMS-based storage can improve the array performance dramatically, with a cost performance ratio several times better than conventional arrays even if MEMS storage costs ten times as much as disk. We also demonstrate that hybrid MEMS/disk arrays, which cost less than purely MEMS-based arrays, can provide substantial improvements in performance and cost/performance over conventional arrays. 1
File Format	PDF
Publisher Date	2003-01-01
Access Restriction	Open
Subject Keyword	Conventional Array Disk Drive Cost Characteristic Substantial Improvement Current Disk Array Disk Array Array Performance New Storage Technology Microelectromechanical System Memory Technology Real Application Several Time Cache Cost Disk Latency Non-volatile Dram Access Time Non-volatile Dram Cache Mems-based Array Magnetic Disk Drive Detailed Disk Array Simulator Mem Storage Cost Highperformance Storage System Hybrid Mem Disk Array Cost Performance Potential Gain Potential Placement Mems-based Storage Basic Building Block
Content Type	Text
Resource Type	Conference Proceedings

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