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Apache Spark Is Another Increasingly Popular Alternative To Replace Mapreduce With A More Performant Execution Engine But Still Use Hadoop Hdfs As Storage Engine For Large Data Sets. hadoop Mapreduce Framework Is Primarily Designed For Batch Processing And That Makes It Less Suitable For Ad-hoc Data Exploration, Machine Learning Processes And The Like. Big Data Vendors Are Trying To Address This Challenge By Replacing Mareduce With Alternatives. In Case Of Sql On Hadoop.