Performance-Aware Based Correlated Datasets Replication Strategy

Performance-aware based correlated datasets replication strategy (PCDRS) has been put forward to solve the issue of how to place datasets at a wide area distributed environment to support researchers on interdisciplinary scientific research. The issue is addressed from three parts. First of all, we gave out the replica number based on the performance requirement of the datasets. Secondly, according to the performance of the datanode, we determined the location for placing the datasets replica. Thirdly, we distinguished data from hot and cold to control the number of replicas elastically. The strategy has been put into tests on a HDFS cluster. The result shows that our strategy is performance effective in maintaining the reliability of datasets and promoting the access performance of the cluster.