How to make hive run mapreduce jobs concurrently?
In hive-default.xml, there is a property named "hive.exec.parallel" which could enable execute job in parallel. The default value is "false". You can change it to "true" to acquire this ability. You can use another property "hive.exec.parallel.thread.number" to control how many jobs at most can be executed in parallel.
For more details: https://issues.apache.org/jira/browse/HIVE-549