[jira] Created: (HADOOP-6632) Support for using different Kerberos keys for different instances of Hadoop services

Support for using different Kerberos keys for different instances of Hadoop services Key: HADOOP-6632 URL: https://issues.apache.org/jira/browse/HADOOP-6632 Project:

Re: Why hadoop jobs need setup and cleanup phases which would consume a lot of time ?

>From our test of hadoop-0.20.1 on 10 nodes, we find the setup period is longer as more jobs are submitted. I don't know why maptask for setup is needed, why not jobtracker or one thread takes over this work? 2010/3/11 Jeff Zhang > Hi Zhou, > > I look at the source code, it seems it is the JobT