Performance analysis of a dual striping strategy for replicated disk arrays

Strategies for organizing the two copies of data in the context of database applications are compared. The effects of small and large stripe sizes on the performance of disk arrays with two active copies of data under a mixed workload of queries and transactions with a skewed access pattern are considered. A dual striping strategy which uses different stripe sizes for the two copies is proposed. An analytical performance model is devised for this scheme, and the results are shown to match well with simulation data. Comparison with uniform striping strategies shows that the dual striping scheme yields the most stable performance in a variety of workloads