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From: Ted Yu <yuzhihong@gmail.com>
Date: Wed, 1 Mar 2017 15:43:10 -0800
Message-ID: <CALte62ysZZSCVzG8TeORvJL=YR1gQPJ=2gYNvfTmvWMOinUbSg@mail.gmail.com>
Subject: Re: parallel processing of regions in coprocessor
To: "user@hbase.apache.org" <user@hbase.apache.org>
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archived-at: Wed, 01 Mar 2017 23:43:18 -0000

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To my knowledge, there is no support for this type of combination of map
reduce and coprocessor.

On Wed, Mar 1, 2017 at 2:55 PM, Daniel Po=C5=82acza=C5=84ski <dpolaczanski@=
gmail.com>
wrote:

> It is something like map reduce processing.
> I want to run map and combine phase inside in a coprocessor for every
> region separately, return partial results to the client. On the client
> invoke reduce phase and store result in another hbase table.
>
> 2017-03-01 23:26 GMT+01:00 Ted Yu <yuzhihong@gmail.com>:
>
> > Can you describe your use case in more detail ?
> >
> > What type of custom coprocessor are you loading to the region server ?
> >
> > Thanks
> >
> > On Wed, Mar 1, 2017 at 2:24 PM, Daniel Po=C5=82acza=C5=84ski <
> dpolaczanski@gmail.com
> > >
> > wrote:
> >
> > > Hi,
> > > Let's assume that we have cluster consisting from one RegionServer an=
d
> > the
> > > RegionsServer contains one table consisting from 3 regions.
> > >
> > > I would like to process regions  in coprocessor parallely. Is it
> > possible?
> > >
> > > I observed that currenlty it invokes coproprocessor with all the
> regions
> > > one by one. So it process at the beginig region1, when finished proce=
ss
> > > regions2 and ...
> > >
> > > Is it possible to change this behaviour?
> > >
> > > Regards
> > >
> >
>

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