Signed-off-by: xie xingguo <xie.xingguo@zte.com.cn>
how much data we *should* be storing where. However, because CRUSH is
based on a pseudorandom placement process, there is always some
variation from this ideal distribution, the same way that rolling a
-die sixty times will not result in rolling exactly 10 ones and 10
+dice sixty times will not result in rolling exactly 10 ones and 10
sixes. Weight sets allow the cluster to do a numerical optimization
based on the specifics of your cluster (hierarchy, pools, etc.) to achieve
a balanced distribution.