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From ch huang <justlo...@gmail.com>
Subject Re: the scan will be executed parallel if not use coprocessor?
Date Mon, 15 Jul 2013 01:50:49 GMT
phoenix is using coprocessor internal

On Sun, Jul 14, 2013 at 11:15 PM, Asaf Mesika <asaf.mesika@gmail.com> wrote:

> 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 <yuzhihong@gmail.com
> <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 <justlooks@gmail.com
> <javascript:;>>
> > wrote:
> > >
> > > > ATT
> > >
> >
>
>
> --
> Sent from Gmail Mobile
>

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