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HBase >> mail # user >> the scan will be executed parallel if not use coprocessor?


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Re: the scan will be executed parallel if not use coprocessor?
To my knowledge, scan is not parallel, hence the speed of queries of
Impala, Phoenix, and other similar projects.

On Saturday, July 13, 2013, ch huang wrote:

> hi ted ,for example i have a table with 10 regions, if i offer the
> condition hit the data of 8 regions,is it different do it use oraginal scan
> and use coprocessor? i know coprocessor can do it parallel for each region
> ,but why the oraginal scan will slow than coprocessor?
>
>
>
> On Sat, Jul 13, 2013 at 7:36 PM, Ted Yu <[EMAIL PROTECTED]<javascript:;>>
> wrote:
>
> > Can you clarify your question a little bit ?
> >
> > That is, are you expecting parallel scan within region boundary or across
> > boundaries ?
> >
> > Cheers
> >
> > On Jul 13, 2013, at 1:43 AM, ch huang <[EMAIL PROTECTED]<javascript:;>>
> wrote:
> >
> > > ATT
> >
>
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