Re: Hbase count qualifier

[Jean-Marc Spaggiari <je...@spaggiari.org>]

Hi Dalia,

If you are not maintaining an index for this table, then you will have
to scan the entire table a count the entries... You can do that with a
regular scan, or you can use a coprocessor to do that on the server
side.

JM

2012/9/29, Dalia Sobhy <da...@hotmail.com>:
> Hello all,
>
> I am using hbase 0.90.6 and thrift server.
>
> I want to count the occurrences of a specific qualifier.
>
> For example if i have a table containing col family (info:) that contains
> qualifiers(courses, students)
>
> I want to count the number of students attending the English course
>
> So any help please ??
>
>
>

Re: Hbase count qualifier

[Shumin Wu <sh...@gmail.com>]

Hi Dalia,

I believe RowCounter (mapreduce) or AggregationClient (coprocessor) can
solve your problem.

Shumin

On Mon, Oct 1, 2012 at 10:02 AM, Jean-Marc Spaggiari <
jean-marc@spaggiari.org> wrote:

> Hi Dalia,
>
> If you are not maintaining an index for this table, then you will have
> to scan the entire table a count the entries... You can do that with a
> regular scan, or you can use a coprocessor to do that on the server
> side.
>
> JM
>
> 2012/9/29, Dalia Sobhy <da...@hotmail.com>:
> > Hello all,
> >
> > I am using hbase 0.90.6 and thrift server.
> >
> > I want to count the occurrences of a specific qualifier.
> >
> > For example if i have a table containing col family (info:) that contains
> > qualifiers(courses, students)
> >
> > I want to count the number of students attending the English course
> >
> > So any help please ??
> >
> >
> >
>