look at the thread http://search-hadoop.com/m/GHUWQ1xnbj21, it explain a lot on major compaction and enhancement over versions
Mikael.S On Thu, Jan 26, 2012 at 3:51 PM, Damien Hardy <[email protected]> wrote: > 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 > > Hello, > 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. > > Cheers, > > -- > Damien > > -- Mikael.S
