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). What do you mean with "lots of IO"? the messages in "/var/log/messages" and "/var/log/warn"?
Simply disk activity. See i.e. "iostat -k 1". -- Tomasz Chmielewski http://wpkg.org -- 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
