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From Jean-Marc Spaggiari <jean-m...@spaggiari.org>
Subject Re: Scan vs map-reduce
Date Mon, 14 Apr 2014 11:46:28 GMT
Hi Li Li,

If you have more than one region, might be useful. MR will scan all the
regions in parallel. If you do a full scan from a client API with no
parallelism, then the MR job might be faster. But it will take more
resources on the cluster and might impact the SLA of the other clients, if
any,

JM


2014-04-14 2:42 GMT-04:00 Mohammad Tariq <dontariq@gmail.com>:

> Well, it depends. Could you please provide some more details?It will help
> us in giving a proper answer.
>
> Warm Regards,
> Tariq
> cloudfront.blogspot.com
>
>
> On Mon, Apr 14, 2014 at 11:38 AM, Li Li <fancyerii@gmail.com> wrote:
>
> > I have a full table scan which cost about 10 minutes. it seems a
> > bottleneck for our application. if use map-reduce to rewrite it. will
> > it be faster?
> >
>

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