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From tommaso barbugli <tbarbu...@gmail.com>
Subject Re: keyspace with hundreds of columnfamilies
Date Wed, 02 Jul 2014 15:40:18 GMT
1MB per column family sounds pretty bad to me; is this something I can
tweak/workaround somehow?

Thanks
Tommaso


2014-07-02 17:21 GMT+02:00 Romain HARDOUIN <romain.hardouin@urssaf.fr>:

> The trap is that each CF will consume 1 MB of memory due to arena
> allocation.
> This might seem harmless but if you plan thousands of CF it means
> thousands of mega bytes...
> Up to 1,000 CF I think it could be doable, but not 10,000.
>
> Best,
>
> Romain
>
>
> tommaso barbugli <tbarbugli@gmail.com> a écrit sur 02/07/2014 10:13:41 :
>
> > De : tommaso barbugli <tbarbugli@gmail.com>
> > A : user@cassandra.apache.org,
> > Date : 02/07/2014 10:14
> > Objet : keyspace with hundreds of columnfamilies
> >
> > Hi,
> > Are there any known issues, shortcomings about organising data in
> > hundreds of column families?
> > At this present I am running with 300 column families but I expect
> > that to get to a couple of thousands.
> > Is this something discouraged / unsupported (I am using Cassandra 2.0).
> >
> > Thanks
> > Tommaso
>

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