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Massive Array of Idle Disks

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Encyclopedia of Database Systems

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Synonyms

MAID

Definition

The term Massive Array of Idle Disks refers to an energy-efficient disk array which has the capability of changing its disk drives into a low-power mode when the disk drives are not busy. Disk drives of the array may be controlled individually or in a group. The term Massive Array of Idle Disks is often abbreviated to MAID. A MAID disk array may have additional functions such as data migration/replication and access prediction to improve the energy saving.

Key Points

The basic idea of MAID is to save energy by exploiting storage access locality. That is, some disk drives which are installed in a disk array are frequently accessed whereas the others are rarely busy. MAID tries to spin down or power off such “low-temperature” disk drives to decrease the total energy consumption. The original papers [1, 2] which introduced MAID in 2002 studied different design choices and configurations. MAID disk arrays are mainly used for archival storage (replacing...

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Recommended Reading

  1. Colarelli D, Grunwald D. Massive Arrays of Idle Disks for Storage Archives. In: Proceedings of the 2002 ACM/IEEE Conference on Supercomputing; 2002. p. 1–11.

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  2. Colarelli D, Grunwald D, Neufeld M. The case for massive arrays of idle disks (MAID). In: Proceedings of the 1st USENIX Conference on File and Storage Technologies Work-in Progress Reports; 2002.

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  3. Storage Network Industry Association. The dictionary of storage networking terminology. Also available at: http://www.snia.org/.

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Author information

Authors and Affiliations

  1. The University of Tokyo, Tokyo, Japan

    Kazuo Goda

Authors
  1. Kazuo Goda
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Corresponding author

Correspondence to Kazuo Goda .

Editor information

Editors and Affiliations

  1. Georgia Institute of Technology College of Computing, Atlanta, GA, USA

    Ling Liu

  2. University of Waterloo School of Computer Science, Waterloo, ON, Canada

    M. Tamer Özsu

Section Editor information

  1. Inst. of Industrial Science, Univ. of Tokyo, Tokyo, Meguro Ku, Japan

    Masaru Kitsuregawa

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© 2018 Springer Science+Business Media, LLC, part of Springer Nature

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Goda, K. (2018). Massive Array of Idle Disks. In: Liu, L., Özsu, M.T. (eds) Encyclopedia of Database Systems. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-8265-9_1346

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