Study on Replica Strategy of Big Data Storage based on Cloud Environment

The replica technology in cloud storage can not only maintain the high availability of the system, but also improve the overall performance of the system. This paper analyzes the limitations of the existing replica placement strategy in heterogeneous environment, and proposes a reasonable replica placement improvement strategy based on the comprehensive performance evaluation value of the node. The experimental results show that the improved replica placement strategy can make the replica distribution more reasonable and balanced on the premise of ensuring the overall availability of the system.