Data Distribution Strategy Research on ESS

In this paper we describe the evolutionary storage system which could adjust its storage strategy automatically according to the current running environment. In the evolutionary processes, ESS could automatically choose one system organizing strategy which fits for the current running environment best, to keep the dynamic balance of the whole storage system. One of the three evolutionary ways is data distribution evolutionary, the data distribution strategy considers both the application data accessing frequency and physical disk performance, and adjust the data distribution automatically to optimize the storage system read/write performance.We have constructed a simulation model to demonstrate how the system performance could be improved by applying the data distribution strategy.