http://www.enterprisedaddy.com/2017/02/set-round-robin-iops-limit-default-1000-1-using-powercli/
1,Query the paths of the LUN
esxcli storage nmp path list --device naa.60000971111492600622233032393333
2,Set the path policy to Round Robin
esxcli storage nmp device set --device naa.60000971111492600622233032393333 --psp VMWPSPRR
3,Set the Round Robin IOPS for switch path to 1
esxcli storage nmp psp roundrobin deviceconfig set --type=iops --iops=1 --device=naa.60000971111492600622233032393333
4,To verify if the changes are applied
esxcli storage nmp device list
Set the Round Robin IOPS limit from 1000 to 1
原文：http://blog.51cto.com/549687/2088898