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Re: HTablePool
Mohammad Tariq 2012-11-19, 13:51
I totally agree with Kevin.

Regards,
    Mohammad Tariq

On Mon, Nov 19, 2012 at 7:15 PM, Kevin O'dell <[EMAIL PROTECTED]>wrote:

> Dalla,
>
>    It is always a good idea to ask questions when first jumping into HBase.
>  One piece of advice I would give is to take it slow with your jobs.  Start
> as simple as possible, then move to filter if you need it.  Co-proc should
> be a last step as they involve intricate understanding of HBase internals
> and make your cluster exponentially harder to support since there is now
> custom code being injected.
>
> On Sat, Nov 17, 2012 at 2:00 PM, Mohammad Tariq <[EMAIL PROTECTED]>
> wrote:
>
> > Hey, no need to be sorry for anything. I never wanted to sound harsh.
> Don't
> > mind. Yes you are right. Get returns only 1 row. And for your 2nd
> question,
> > it depends on what suits your particular use case best. If it allows you
> to
> > use filters efficiently then do that. Otherwise go for co-proc.
> >
> > Regards,
> >     Mohammad Tariq
> >
> >
> >
> > On Sun, Nov 18, 2012 at 3:18 AM, Dalia Sobhy <[EMAIL PROTECTED]
> > >wrote:
> >
> > >
> > >
> > > Dear Mohamed,
> > >
> > > I already read Hbase book, but because it is providing alot of
> functions
> > I
> > > got confused !!
> > >
> > > So forgive me I need to ask another question..
> > >
> > > Does Scan returns all rows and Get only one row, am I right?
> > >
> > > Whats better using Coprocessors or Filters for aggregate functions, in
> > > case of performance wise ?
> > >
> > >
> > > > From: [EMAIL PROTECTED]
> > > > Date: Sun, 18 Nov 2012 02:47:15 +0530
> > > > Subject: Re: HTablePool
> > > > To: [EMAIL PROTECTED]
> > > >
> > > > All Scan operations are identical to Get with the exception of
> > > > instantiation. Get works on a single roe while in Scan rather than
> > > > specifying a single row, an optional startRow and stopRow may be
> > defined
> > > > with Scan. If rows are not specified, all the rows are iterated. I
> > would
> > > > suggest you to go through the official book at -
> > > > http://hbase.apache.org/book.html
> > > >
> > > > Regards,
> > > >     Mohammad Tariq
> > > >
> > > >
> > > >
> > > > On Sun, Nov 18, 2012 at 2:41 AM, Stack <[EMAIL PROTECTED]> wrote:
> > > >
> > > > > On Sat, Nov 17, 2012 at 12:38 PM, Dalia Sobhy
> > > > > <[EMAIL PROTECTED]> wrote:
> > > > > >
> > > > > > Thanks Stack :D
> > > > > >
> > > > > > Another Question: Whats the difference between Scan and Get??
> > > > > >
> > > > >
> > > > > What do you think?
> > > > > St.Ack
> > > > >
> > >
> > >
> >
>
>
>
> --
> Kevin O'Dell
> Customer Operations Engineer, Cloudera
>