How to make hive run mapreduce jobs concurrently?

Question

I\'m new to hive and I have encountered a problem,

I have a table in hive like this:

create table td(id int, time string, ip string, v1 bigint, v         


        

Answer 1

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