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HBase, mail # user - Running prefix scans in hbase


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Re: Running prefix scans in hbase
Varun Sharma 2013-05-15, 15:00
Not after but only before hitting the prefix - I will check the startRow
stuff - I could not find where the seek happens for that...
On Wed, May 15, 2013 at 7:51 AM, Stack <[EMAIL PROTECTED]> wrote:

> On Tue, May 14, 2013 at 11:33 PM, Varun Sharma <[EMAIL PROTECTED]>
> wrote:
>
> > Hi,
> >
> > I was looking at PrefixFilter but going by the implementation - it looks
> we
> > scan every row until we hit the prefix instead of seeking to the row with
> > the required prefix.
> >
> > I was wondering if there are more efficient alternatives which would do a
> > real seek rather than scanning all rows. Would setting startRow and
> stopRow
> > - effectively seek to startRow and then perform the scan ?
> >
>
> Are you saying the prefix filter keeps reading rows even though it has
> passed out the prefix?   I'd think it would return true out of
>
> http://hbase.apache.org/apidocs/org/apache/hadoop/hbase/filter/PrefixFilter.html#filterAllRemaining()once
> it had gone past rows with the prefix?
>
> St.Ack
>