Heterogeneous disk array: Design and data allocation

Document Type

Conference Proceeding

Publication Date

12-1-2005

Abstract

Dataset attributes, such as data availability levels and access patterns, make their mapping to certain RAID levels more desirable than others. On the other hand, it is not economically viable for an installation to purchase multiple disk arrays to satisfy diverse data storage requirements. We propose a Heterogeneous Disk Array - HDA as a solution to this problem. HD A allows multiple virtual arrays - VAs, e.g., RAIDI and RAID5, to coexist over a set of possibly heterogeneous disks, adding another degree of heterogeneity. We define the metadata and the functions associated with HDA as follows: (i) allocation of new VAs and files within VAs. (ii) address translation required for read and update operations, (iii) system tuning and scalability issues. VA allocation is based on two-dimensional bin-packing (disk utilization and capacity). We report on a simulation study where new files are allocated onto an empty HDA and estimate system performance as the HDA is populated. HDA introduces a new framework for performance analysis and data allocation studies in disk arrays, which will be explored in forthcoming studies.

Identifier

84870035220 (Scopus)

ISBN

[9781622763504]

Publication Title

International Symposium on Performance Evaluation of Computer and Telecommunication Systems 2005 Spects 05 Part of the 2005 Summer Simulation Multiconference Summersim 05

First Page

617

Last Page

624

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