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From: Jean-Marc Spaggiari <jean-marc@spaggiari.org>
Date: Mon, 24 Feb 2014 15:17:11 -0500
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Subject: Re: Some questions to get clear view
To: user <user@hbase.apache.org>
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People on HBase for longer than me might correct me if they have the
history of why, but each CF will go in its own directory and will create
its own store file. It might be related.


2014-02-24 15:11 GMT-05:00 Upendra Yadav <upendra1024@gmail.com>:

> Thanks for your Reply...
>
> But what is the benefits of different memstore for different CF, when all
> of them are going to flush on the same time?
>
>
> On Tue, Feb 25, 2014 at 1:23 AM, Jean-Marc Spaggiari <
> jean-marc@spaggiari.org> wrote:
>
> > 1. correct.
> > 2. Regions doesn't have memstores. Regions servers have memstores. On per
> > region per CF. all the memstores for a single regions are flush at the
> same
> > time when one is full, even if the others are not.
> >
> > HTH.
> >
> > JM
> >
> >
> > 2014-02-24 14:35 GMT-05:00 Upendra Yadav <upendra1024@gmail.com>:
> >
> > > 1. One region server can have more than one region for same table
> > >
> > > 2. Which one is correct:
> > >
> > > a) Each region has one memstore( and all CF for this region will reside
> > in
> > > this single
> > > memstore) and if memstore size reached its configured limit it will
> > > snapshot and flush... due to single CF all CF have to flush.
> > >
> > > b) Each region has n no. of CF and each CF has its own memstore. And
> when
> > > one CF's memstore get full it will snapshot and flush. And will not
> force
> > > to flush other CF.
> > >
> > > I read the current document some days before and now once again i got
> > that
> > > doubts...
> > >
> >
>

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