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From Nate McCall <n...@thelastpickle.com>
Subject Re: Continue running major compaction after switching to LeveledCompactionStrategy
Date Fri, 23 Aug 2013 16:02:07 GMT
Take a look at the following article:
http://www.datastax.com/dev/blog/when-to-use-leveled-compaction

You'll want to monitor your IOPS for a while to make sure you can spare the
overhead before you try it. Certainly one at a time on column families and
only where the use case makes sense given the above.


On Thu, Aug 22, 2013 at 9:58 PM, Lucas Fernandes Brunialti <
lbrunialti@igcorp.com.br> wrote:

> Hello,
>
> I also have some doubts about changing to leveled compaction:
>
> 1) Is this change computationally expensive? My sstables have around 7gb
> of data, I'm afraid the nodes won't handle the pressure of compactions,
> maybe dying by OOM or getting an extremely high latency during the
> compactions...
>
> 2) How long does this transition takes? I mean, to finish the splitting of
> these sstables and all the compactions needed... I wanted to know this to
> make a fair comparison of which compaction algorithm is better for my data.
>
> 3) And finally, which would be an optimal size for the sstables, that LCS
> parameter?
>
> I'm running a 8 node cluster on aws (ec2 m1.xlarge), using ephemeral
> drives and cassandra version 1.2.3.
>
> I will really appreciate the help! :)
>
> Lucas Brunialti.
> Thanks much Rob!
>
> Brian
>
>
>
> --
> View this message in context:
> http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Continue-running-major-compaction-after-switching-to-LeveledCompactionStrategy-tp7589839p7589846.html
> Sent from the cassandra-user@incubator.apache.org mailing list archive at
> Nabble.com.
>

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