Adaptive Redundant Data Allocation Using Unused Blocks for Improving Access Efficiency in Dependable Storage Systems

Abstract

This paper has presented a data allocation method with erasure correction coding to design dependable storage system. This adaptive data allocation can reduce the number of access to unavailable storage elements, moreover it also improve the reliability of the system. We proposed variable information word length method which can reduce the number of blocking accesses, and two ideas are presented to reduce the allocation map size and update cost.