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From Ted Yu <yuzhih...@gmail.com>
Subject Re: Hbase full scan
Date Wed, 14 May 2014 16:04:10 GMT
RegexFilter extends AbstractPatternFilter.

Among the filters shipped with HBase, here're the ones which do row
skipping:

ColumnPaginationFilter
ColumnPrefixFilter
ColumnRangeFilter
FuzzyRowFilter
MultipleColumnPrefixFilter


On Wed, May 14, 2014 at 8:20 AM, Mike Axiak <mike@axiak.net> wrote:

> Just to clarify - filters can only skip rows when the filter is
> operating on the row keys, and even then only some filters can take
> advantage of this. (Notably, FuzzyRowFilter and RegexFilter)
>
> Best,
> Mike
>
> On Mon, May 12, 2014 at 11:17 PM, mu yu <win.acc@gmail.com> wrote:
> > Hi JM,
> > Thanks for your reply .
> > Ok,that's mean when filter or start row and stop row are used ,the scan
> > would skip the other rows.
> > Thank you so much.
> >
> >
> > On Tue, May 13, 2014 at 2:15 AM, Jean-Marc Spaggiari <
> > jean-marc@spaggiari.org> wrote:
> >
> >> Hi Mu,
> >>
> >> For a scan you can give start row and stop row. If you do so, it's only
> a
> >> partial scan. Also, if you add filters, rows are skipped on the server
> >> side.
> >>
> >> So you need to think your key to match your access pattern to avoid huge
> >> scans.
> >>
> >> JM
> >>
> >>
> >> 2014-05-07 5:06 GMT-04:00 mu yu <win.acc@gmail.com>:
> >>
> >> > Hi
> >> > We  deployed  a hbase-hadoop cluster for log storage .It's known hbase
> >> has
> >> > no index , i wanna know all the scan including the hbase filter scan
> are
> >> > full table scan ,and there's no other scans ?
> >> > For example if  implement a  rowkey  scan by rowkey filter , and
>  hbase
> >> > would execute a full table scan .
> >> >
> >> > Any reply are appreciate.Thanks in advance.
> >> >
> >>
>

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