On Tue, Jun 16, 2015 at 5:58 PM, Duncan <1i5t5.duncan@xxxxxxx> wrote: > On a current kernel unlike older ones, btrfs actually automates entirely > empty chunk reclaim, so this problem doesn't occur anything close to near > as often as it used to. However, it's still possible to have mostly but > not entirely empty chunks that btrfs won't automatically reclaim. A > balance can be used to rewrite and combine these mostly empty chunks, > reclaiming the space saved. This is what Hugo was recommending. Yes, as little as a -dusage=5 (data chunks that are 5% or less full) can clear the problem and is very fast, seconds. Possibly a bit longer, many seconds o single digit minutes is -dusage=15. I haven't done a full balance in forever. -- Chris Murphy -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
