issue about cluster balance

[ch huang]

hi,maillist:
                 i have a 5-node hadoop cluster,and yesterday i add 5 new
box into my cluster,after that i start balance task,but it move only 7%
data to new node in 20 hour , and i already set
dfs.datanode.balance.bandwidthPerSec 10M ,and the threshold is 10%,why the
balance task take long time ?