On Thursday, January 20, 2011 14:40:00 Helmut Hullen wrote: > Hallo, Andreas, > > Du meintest am 20.01.11: > > Maybe it is a very stupid question but I want to ask it anyway. In > > general, 'btrfs filesystem balance' takes very long to finish and > > produces lots of IO. So what are the classical usage scenarios, when > > it is (really) worth doing a balance? > > Here (Kernel 2.6.37, btrfs git Nov. 2010): balancing two disks/ > partitions with 2 and 1.5 TByte needs about 24 hours (CPU 1.5 GHz). > That's the effect of lots of IO. IMHO it shouldn't take more than 4-8h for 1TB 7200rpm disks in an otherwise idle system, as such it's rather inefficient right now.
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