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From Jianshi Huang <jianshi.hu...@gmail.com>
Subject Re: Scan columns of a row within a Range
Date Thu, 17 Jul 2014 07:45:40 GMT
Hi Esteban,

Yes, I found it moments ago. Is it as efficient as the Row scan?

And can I have millions of columns for a row with no or little performance
impaction? (the traditional tall vs wide problem, the hbase manual
recommends tall table than wide table).


Jianshi


On Thu, Jul 17, 2014 at 3:01 PM, Esteban Gutierrez <esteban@cloudera.com>
wrote:

> Hi Jianshi,
>
> Have you looked into the ColumnRangeFilter?
>
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/ColumnRangeFilter.html
>
> cheers,
> esteban.
>
>
> --
> Cloudera, Inc.
>
>
>
> On Wed, Jul 16, 2014 at 11:40 PM, Jianshi Huang <jianshi.huang@gmail.com>
> wrote:
>
> > Hi,
> >
> > I scanned through HBase' Scan API and couldn't find out how to scan a
> range
> > of columns in a row.
> >
> > It seems I can only do scan(startRow, endRow), which are both just
> RowKeys.
> >
> > What's the most efficient way to do it? Should I use a Filter? I heard
> > filter is not as efficient as RK scans, how much slower is it?
> >
> > (BTW, I was using Accumulo for the same thing and it has a really nice
> API
> > (Range, Key) for it. A Key is a combination of RK+CF+CQ+TS.)
> >
> > Am I missing anything?
> >
> > Cheers,
> > --
> > Jianshi Huang
> >
> > LinkedIn: jianshi
> > Twitter: @jshuang
> > Github & Blog: http://huangjs.github.com/
> >
>



-- 
Jianshi Huang

LinkedIn: jianshi
Twitter: @jshuang
Github & Blog: http://huangjs.github.com/

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