Oh I see now, well HBase doesn't compact tables, only HFiles. So in your case the only time you want compactions is for totally new data, to regroup all the flushed HFiles together so that when reading you don't open a bunch of files.
J-D On Tue, May 18, 2010 at 3:12 PM, TuX RaceR <[email protected]> wrote: > Thanks J-D, > > sorry for my bad English, what I meant about the space is because my data is > almost immutable (i.e. almost no update and not delete), if I compact two > tables of size S1 and S2, the size of the merged table will be almost S1+S2, > whereas if (if I understand well how it works) if I have made a lot of > deletes on the two original tables, the size of the merged table could be > much less than S1+S2. > > I do not have right now problem with disk space, but the 20% thumb rule is > good to know (we all end up filling our large disks ;) ) > > Thanks > TuX > > On 18/05/10 18:27, Jean-Daniel Cryans wrote:
