Effect of skew on join performance in parallel architectures
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The paper is devoted to the problem of effective query execution in cluster-based systems. An original approach to data placement and replication on the nodes of a cluster system is presented. Based on this approach, a load balancing method for parallel query processing is developed. A method for parallel query execution in cluster systems based on the load balancing method is suggested. Results of computational experiments are presented, and analysis of efficiency of the proposed approaches is performed.