-Re: How to know it's time for a major compaction?
Kevin O'dell 2012-12-12, 20:30
Yes, it is all done through scripting.
On Wed, Dec 12, 2012 at 3:22 PM, Ted Yu <[EMAIL PROTECTED]> wrote:
> bq. they will major compact any region the balancer has moved.
> Interesting. Do they achieve this through scripting ?
> I think HBase can perform some follow-on action after region movement.
> On Wed, Dec 12, 2012 at 12:19 PM, Kevin O'dell <[EMAIL PROTECTED]
> > Otis,
> > 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
> > 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 <
> > [EMAIL PROTECTED]> wrote:
> > > Hello,
> > >
> > > What are the main metrics/signals people use/look at to say "OK, I
> > > 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
Customer Operations Engineer, Cloudera