Hi Abhishek, Aggregation Group is for cube optimization,
Kylin will pick up dimension column and *fk on lookup table* as default rowkey and aggregation group item. you can refer http://www.slideshare.net/YangLi43/design-cube-in-apache-kylin to know more about cube creation first. and for kylin architecture http://www.slideshare.net/YangLi43/apache-kylin-deep-dive-2014-dec?next_slideshow=1 On Mon, Mar 30, 2015 at 2:16 PM, Abhishek Sinha <[email protected]> wrote: > Can someone explain the following while designing the cube in Kylin? > > 1. New Aggregation Groups > 2. New RowKey Column > > By default, Kylin automatically picks up the some values for RowKey and > Aggregation groups in Advanced Settings Page. > a) How is that done? > b) When do we need add our own Aggregation Groups and RowKey? > c) How is RowKey related to Aggregation Groups? > d) What does length, dictionary and mandatory indicate? > > -- > Abhishek Sinha > Mobile: +919035191078 > infoworks.io >
