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From Edward Capriolo <>
Subject Re: word of caution to those switching to LCS from SizeTieredStrategy
Date Tue, 12 Mar 2013 21:29:26 GMT
yes LCS has its own compacting thing. It does not honor min compaction, max
compaction, and no-ops major compaction. The issue is that at the moment
you change your system moves all your sized data to L0 and then starts a
huge compaction grid to level it.

It would be great to just make this change to one server and see

Check out the write sampling mode.


On Tue, Mar 12, 2013 at 9:08 AM, Hiller, Dean <> wrote:

> We tested it in QA, but in production it brought our cluster to a halt
> even though we setcompactionthroughput to 1, we were severely limited.
>  Nodetool stop compaction did not seem to have any impact either.  We ended
> up increasing memory on one node to help alleviate some issue(cranked it up
> to 16G and we hope to put it back down to 8 G later).
> Just be careful if you are trying to make the switch.  Also, I added this
> jira ticket which would be extremely nice to turn on LCS for a CF/node and
> do a node by node switch…
> Dean

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