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Performance of balanced disk array schemes

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3 Author(s)
W. A. Burkhard ; California Univ., La Jolla, CA, USA ; K. C. Claffy ; T. J. E. Schwarz

The balanced information dispersal algorithm (BIDA) provides attractive reliability enhancements as well as modest performance gains for the storage of data at a number of storage sites. A balanced disk array (BDA) is an application of BIDA. Although a BDA appears as a single, very reliable, fast direct-access device, it actually consists of a number of independent disks that store data according to a selected dispersal scheme. BDA devices offer exceptionally high fault tolerance combined with better performance than their constituent disks. As a result, a BDA achieves high quality with relatively low-quality components. BDA schemes also offer the flexibility to arrange for a desired ratio between read and write times. The authors discuss the construction, failure tolerance, and performance of BDAs.<>

Published in:

Mass Storage Systems, 1991. Digest of Papers., Eleventh IEEE Symposium on

Date of Conference:

7-10 Oct. 1991