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Posted to user@hbase.apache.org by Mohit Anchlia <mo...@gmail.com> on 2012/08/01 06:40:41 UTC
Multiple CF and versions
Are there any disadvantages of:
1. using multiple column families in a table
2. using multiple versions of a columns
Re: Multiple CF and versions
Posted by Alex Baranau <al...@gmail.com>.
These questions were raised many times in this ML and in other sources
(blogs, etc.). You can find them with a little effort.
Alex Baranau
------
Sematext :: http://blog.sematext.com/ :: Hadoop - HBase - ElasticSearch -
Solr
On Wed, Aug 1, 2012 at 1:33 AM, Mohammad Tariq <do...@gmail.com> wrote:
> Hello Mohit,
>
> It is advised not to go above two or three column families.
> This is because, when we have many column families, the flushing and
> compaction can cause too many needless i/o operations, thus reducing
> the performance.
>
> As far as versions are concerned, default value is 3. Although
> we can change it as per our need, but it is not recommended to set the
> number of max versions to an exceedingly high level because this will
> increase size of the StoreFile greatly.
>
> Regards,
> Mohammad Tariq
>
>
> On Wed, Aug 1, 2012 at 10:10 AM, Mohit Anchlia <mo...@gmail.com>
> wrote:
> > Are there any disadvantages of:
> >
> > 1. using multiple column families in a table
> > 2. using multiple versions of a columns
>
--
Alex Baranau
------
Sematext :: http://blog.sematext.com/ :: Hadoop - HBase - ElasticSearch -
Solr
Re: Multiple CF and versions
Posted by Mohammad Tariq <do...@gmail.com>.
Hello Mohit,
It is advised not to go above two or three column families.
This is because, when we have many column families, the flushing and
compaction can cause too many needless i/o operations, thus reducing
the performance.
As far as versions are concerned, default value is 3. Although
we can change it as per our need, but it is not recommended to set the
number of max versions to an exceedingly high level because this will
increase size of the StoreFile greatly.
Regards,
Mohammad Tariq
On Wed, Aug 1, 2012 at 10:10 AM, Mohit Anchlia <mo...@gmail.com> wrote:
> Are there any disadvantages of:
>
> 1. using multiple column families in a table
> 2. using multiple versions of a columns