Corona

What Does Corona Mean?

Corona is an open-source scheduling framework used on Apache Hadoop based data infrastructure. Corona was initially designed by Facebook to cope up with a large amount of current, incoming data and the queries processed by each data cluster. Corona is considered an advancement or successor to Hadoop MapReduce.

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Techopedia Explains Corona

Corona is primarily designed to manage very large data sets that are beyond the capacity of MapReduce and for improved utilization of cluster resources. Corona works by introducing a specialized cluster manager and a dedicated job tracker for each job. The cluster manager routinely reviews the cluster for free resources and overall activity. The job tracker in turns tracks and monitors the status of each job/task. Job tracker can be executed on the client machine or on the cluster for larger data requirements. By isolating job roles and functions, which Hadoop MapReduce do not do, Corona achieves better cluster utilization and processes more jobs.

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Margaret Rouse
Technology Expert

Margaret is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical business audience. Over the past twenty years, her IT definitions have been published by Que in an encyclopedia of technology terms and cited in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine, and Discovery Magazine. She joined Techopedia in 2011. Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages.