Hi, as far as I know, KYLIN-1066 <https://issues.apache.org/jira/browse/KYLIN-1066> is not about what you are talking about, this job "Kylin Hive Column Cardinality Job" is submitted after you loading table, it's function is calculate Cardinality of every column using hyperLogLog, so it have to use one reducer(something like remove duplicate value), you can check other side of this job to increase executing speed.
2016-02-03 8:11 GMT+08:00 greg gu <[email protected]>: > By the way, the job step that uses 1 reducer is "Kylin Hive Column > Cardinality Job ", is this expected? > > > From: [email protected] > > To: [email protected] > > Subject: only one reducer in job > > Date: Tue, 2 Feb 2016 11:31:37 -0800 > > > > When I process the cube, I found there on only one reducer, which cause > the job to run very long time. > > I found this https://issues.apache.org/jira/browse/KYLIN-1066, it > mentioned the issue is fixed. > > > > If there a way to change the number of reducer? > > > > Thanks, > > > > > > > >
