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Posted to dev@kylin.apache.org by Vineet Mishra <cl...@gmail.com> on 2015/06/11 10:50:53 UTC
Kylin Terminology understanding for Cube Creation
Hi All,
I was creating some cubes through Kylin and was wondering as in second last
tab i.e Advance Setting in the kylin cube creation what is Aggregation
Groups and Dictionary under Rows Keys Section in the Kylin UI.
Moreover it show some length also associated with the columns, is there any
documentation for Kylin where I can have the better understanding of these
terms.
Thanks!
Re: Kylin Terminology understanding for Cube Creation
Posted by Vineet Mishra <cl...@gmail.com>.
Thanks Li! :)
On Fri, Jun 19, 2015 at 3:36 PM, Li Yang <li...@apache.org> wrote:
> Document definitely should improve. I created a JIRA
> https://issues.apache.org/jira/browse/KYLIN-846
>
>
> On Thu, Jun 11, 2015 at 5:43 PM, Shi, Shaofeng <sh...@ebay.com> wrote:
>
> > By default Kylin will build dictionary for all dimension columns; But if
> a
> > column¹s cardinality is very high, dictionary may not help; in that case
> > you can select ³false² for dictionary and then enter the max length of
> > that column, Kylin will directly copy the column values in the cube;
> >
> > On 6/11/15, 4:50 PM, "Vineet Mishra" <cl...@gmail.com> wrote:
> >
> > >Hi All,
> > >
> > >I was creating some cubes through Kylin and was wondering as in second
> > >last
> > >tab i.e Advance Setting in the kylin cube creation what is Aggregation
> > >Groups and Dictionary under Rows Keys Section in the Kylin UI.
> > >
> > >Moreover it show some length also associated with the columns, is there
> > >any
> > >documentation for Kylin where I can have the better understanding of
> these
> > >terms.
> > >
> > >Thanks!
> >
> >
>
Re: Kylin Terminology understanding for Cube Creation
Posted by Li Yang <li...@apache.org>.
Document definitely should improve. I created a JIRA
https://issues.apache.org/jira/browse/KYLIN-846
On Thu, Jun 11, 2015 at 5:43 PM, Shi, Shaofeng <sh...@ebay.com> wrote:
> By default Kylin will build dictionary for all dimension columns; But if a
> column¹s cardinality is very high, dictionary may not help; in that case
> you can select ³false² for dictionary and then enter the max length of
> that column, Kylin will directly copy the column values in the cube;
>
> On 6/11/15, 4:50 PM, "Vineet Mishra" <cl...@gmail.com> wrote:
>
> >Hi All,
> >
> >I was creating some cubes through Kylin and was wondering as in second
> >last
> >tab i.e Advance Setting in the kylin cube creation what is Aggregation
> >Groups and Dictionary under Rows Keys Section in the Kylin UI.
> >
> >Moreover it show some length also associated with the columns, is there
> >any
> >documentation for Kylin where I can have the better understanding of these
> >terms.
> >
> >Thanks!
>
>
Re: Kylin Terminology understanding for Cube Creation
Posted by "Shi, Shaofeng" <sh...@ebay.com>.
By default Kylin will build dictionary for all dimension columns; But if a
column¹s cardinality is very high, dictionary may not help; in that case
you can select ³false² for dictionary and then enter the max length of
that column, Kylin will directly copy the column values in the cube;
On 6/11/15, 4:50 PM, "Vineet Mishra" <cl...@gmail.com> wrote:
>Hi All,
>
>I was creating some cubes through Kylin and was wondering as in second
>last
>tab i.e Advance Setting in the kylin cube creation what is Aggregation
>Groups and Dictionary under Rows Keys Section in the Kylin UI.
>
>Moreover it show some length also associated with the columns, is there
>any
>documentation for Kylin where I can have the better understanding of these
>terms.
>
>Thanks!