A QoS-aware Dynamic Data Replica Deletion Strategy for Distributed Storage Systems under Cloud Computing Environments

As the underlying core infrastructure and important component of cloud computing, distributed storage system is the foundation of all kinds of cloud services. While its replica mechanism enhanced the reliability and performance of system, the extra block replicas consume more disk space and maintenance cost significantly increased too. In this paper, we propose a novel QoS-aware Dynamic Data Replicas Delete Strategy for disk space and maintenance cost saving purpose. Experimental results demonstrate that the DRDS algorithm can save disk space and maintenance costs for distributed storage system while the available and performance QoS requirements are ensured.