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From "Kevin O'dell" <kevin.od...@cloudera.com>
Subject Re: How to know it's time for a major compaction?
Date Wed, 12 Dec 2012 20:19:10 GMT

I think it depends on your use case.  Some use cases are extremely
dependent on locality and latency, so they will major compact any region
the balancer has moved.  Some people follow the HFile count and will
trigger a major when there are x amount of files.  Others will just follow
best practices and do it daily.  Some do very little writes and only
compact once a week.

On Wed, Dec 12, 2012 at 3:15 PM, Otis Gospodnetic <
otis.gospodnetic@gmail.com> wrote:

> Hello,
> What are the main metrics/signals people use/look at to say "OK, I really
> need to do a major compaction now", other than "hm, performance is not
> good, let's try major compaction tonight"?
> Thanks,
> Otis
> --
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Kevin O'Dell
Customer Operations Engineer, Cloudera

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