dfs.replication 2 Block replication hive.exec.compress.output true Enable compress hive.auto.convert.join true Enables the optimization about converting common join into mapjoin hive.auto.convert.join.noconditionaltask true enable map-side join hive.auto.convert.join.noconditionaltask.size 100000000 enable map-side join mapreduce.job.split.metainfo.maxsize -1 The maximum permissible size of the split metainfo file. The JobTracker won't attempt to read split metainfo files bigger than the configured value. No limits if set to -1. hive.stats.autogather true Collect statistics for newly created intermediate table hive.merge.mapfiles false Disable Hive's auto merge hive.merge.mapredfiles false Disable Hive's auto merge mapreduce.map.output.compress.codec org.apache.hadoop.io.compress.SnappyCodec mapreduce.output.fileoutputformat.compress.codec org.apache.hadoop.io.compress.SnappyCodec