1 mkthrottle  -type offload | vdisk | host | hostcluster | mdiskgrp
2?  -bandwidth bandwidth_limit_in_mb
3?  -iops iops_limit
4?  -name throttle_name
5?  -vdisk 
5.1  vdisk_id 
5.1  vdisk_name 
6?  -host 
6.1  host_id 
6.1  host_name 
7?  -hostcluster
7.1  hostcluster_id 
7.1  hostcluster_name 
8?  -mdiskgrp
8.1 mdiskgrp_id
8.1 mdiskgrp_name