Conference Papers
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Item Workload characteristics and resource aware Hadoop scheduler(Institute of Electrical and Electronics Engineers Inc., 2015) Divya, M.; Annappa, B.Hadoop MapReduce is one of the largely used platforms for large scale data processing. Hadoop cluster has machines with different resources, including memory size, CPU capability and disk space. This introduces challenging research issue of improving Hadoop's performance through proper resource provisioning. The work presented in this paper focuses on optimizing job scheduling in Hadoop. Workload Characteristic and Resource Aware (WCRA) Hadoop scheduler is proposed, that classifies the jobs into CPU bound and Disk I/O bound. Based on the performance, nodes in the cluster are classified as CPU busy and Disk I/O busy. The amount of primary memory available in the node is ensured to be more than 25% before scheduling the job. Performance parameters of Map tasks such as the time required for parsing the data, map, sort and merge the result, and of Reduce task, such as the time to merge, parse and reduce is considered to categorize the job as CPU bound or Disk I/O bound. Tasks are assigned the priority based on their minimum Estimated Completion Time. The jobs are scheduled on a compute node in such a way that jobs already running on it will not be affected. Experimental results has given 30 % improvement in performance compared to Hadoop's FIFO, Fair and Capacity scheduler. © 2015 IEEE.Item Improved resource provisioning in Hadoop(Springer Science and Business Media Deutschland GmbH info@springer-sbm.com, 2016) Divya, M.; Annappa, B.Extensive use of the Internet is generating large amount of data. The mechanism to handle and analyze these data is becoming complicated day by day. The Hadoop platform provides a solution to process huge data on large clusters of nodes. Scheduler play a vital role in improving the performance of Hadoop. In this paper, MRPPR: MapReduce Performance Parameter based Resource aware Hadoop Scheduler is proposed. In MRPPR, performance parameters of Map task such as the time required for parsing the data, map, sort and merge the result, and of Reduce task, such as the time to merge, parse and reduce is considered to categorize the job as CPU bound, Disk I/O bound or Network I/O bound. Based on the node status obtained from the TaskTracker’s response, nodes in the cluster are classified as CPU busy, Disk I/O busy or Network I/O busy. A cost model is proposed to schedule a job to the node based on the classification to minimize the makespan and to attain effective resource utilization. A performance improvement of 25–30 % is achieved with our proposed scheduler. © Springer India 2016.