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From Damien Hardy <dha...@figarocms.fr>
Subject Re: the occasion of the major compact?
Date Thu, 26 Jan 2012 13:51:43 GMT
Le 26/01/2012 14:43, yonghu a écrit :
> Hello,
> I read this blog http://outerthought.org/blog/465-ot.html. It mentions
> that every 24 hours the major compaction will occur. My question is
> that if there are any other conditions which can trigger major
> compaction happening? For example, when the size of store file reaches
> the threshold (I think this will cause minor compaction or region file
> split, not major compaction, but not quite sure).
> Thanks!
> Yong

I think when there is massive delete on the table or change table
attribute like TTL (that is susseptible of remove a lot of
versions/rows) or COMPRESSION wich gain a lot of disk space on each region.



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