Performance of balanced disk array schemes
- 10 December 2002
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
Abstract
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.Keywords
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