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From Antonio Si <antonio...@gmail.com>
Subject Re: question on column families
Date Wed, 14 Nov 2018 03:19:51 GMT
Thanks Allan.

Then, why is it a problem of having too many column families? If there are
column
families with no data, would that cause any issues?

Thanks.

Antonio.

On Tue, Nov 13, 2018 at 7:09 PM Allan Yang <allan163@apache.org> wrote:

> No, Every column family has its own memstore. Each one is 128MB in your
> case. When flushing, the flusher will choose those memstore who satisfy
> certain conditions, so it is possible that not every column family(Store)
> will flush the memstore.
> Best Regards
> Allan Yang
>
>
> Antonio Si <antonio.si@gmail.com> 于2018年11月14日周三 上午7:34写道:
>
> > Hi,
> >
> > I would like to confirm my understand.
> >
> > Let's say I have 13 column families in a hbase table. 11 of those column
> > families have no data, which 2 column families have large amount of data.
> >
> > My understanding is that the size of memstore, which is 128M in my env,
> > will be shared across all column families even though there is no data in
> > that column families. Is my understanding correct?
> >
> > Thanks in advance.
> >
> > Antonio.
> >
>

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