This utility provides an external way to measure usage of pools in dCache.  
It prints out the total space used, including replicas, the percentage of 
single-replica files, and the distribution of disk space utilized throughout 
the namespace.

Required Arguments:
	-base <directory>             The base PNFS directory to start in.

Optional Arguments:
	-threshold <%>                Percentage of disk space used a directory
                                      must contain in order to be displayed.
                                      Defaults to 5%.

	-count_replicas               Count replicas (uses the admin interface).