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From Premal Shah <premal.j.s...@gmail.com>
Subject Re: Manage Major Compaction.
Date Fri, 20 Sep 2013 20:34:43 GMT
yes, hbase-site.xml is the right place


On Fri, Sep 20, 2013 at 1:26 PM, Jason Huang <jason.huang@icare.com> wrote:

> Premal,
>
> So this should be set at /conf/hbase-site.xml?
>
> thanks,
>
> Jason
>
>
> On Fri, Sep 20, 2013 at 4:15 PM, Premal Shah <premal.j.shah@gmail.com
> >wrote:
>
> > <!-- Disabling automatic major compaction -->
> >   <property>
> >     <name>hbase.hregion.majorcompaction</name>
> >     <value>0</value>
> >   </property>
> >
> >
> >
> > On Fri, Sep 20, 2013 at 1:06 PM, Jason Huang <jason.huang@icare.com>
> > wrote:
> >
> > > Hello,
> > >
> > > The hbase book at apache website has the following statement about
> > > controlling major compaction: "A common administrative technique is to
> > > manage major compactions manually, rather than letting HBase do it. By
> > > default,HConstants.MAJOR_COMPACTION_PERIOD is one day and major
> > compactions
> > > may kick in when you least desire it - especially on a busy system. To
> > turn
> > > off automatic major compactions set the value to 0."
> > >
> > > So... If we choose to let HBase do it, is there a way we can set to let
> > > HBase do the major compaction at a certain time of the day? Or is it
> > random
> > > and could be at any time of the day?
> > >
> > > And if we set HConstants.MAJOR_COMPACTION_PERIOD to 0, that means we
> have
> > > to kick off major compaction manually through HBase shell or write a
> > script
> > > to enter shell and execute the major compaction at a certain time?
> Also,
> > > where should I set HConstants.MAJOR_COMPACTION_PERIOD = 0? In
> > > /conf/hbase-site.xml?
> > >
> > > thanks!
> > >
> > > Jason
> > >
> >
> >
> >
> > --
> > Regards,
> > Premal Shah.
> >
>



-- 
Regards,
Premal Shah.

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