hbase-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Jean-Marc Spaggiari <jean-m...@spaggiari.org>
Subject Re: Hbase full scan
Date Thu, 15 May 2014 12:03:22 GMT
Exact.

When you specify start row, you jump directly to the right place. And you
stop at end row. Also, if you add a filter to that, you will skip (server
side) some other rows.

JM


2014-05-12 23:17 GMT-04:00 mu yu <win.acc@gmail.com>:

> 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.
> > >
> >
>

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message