Thick & Thin VM Performance both from Datastore side and Storage side

Hi All,

I have huge numbers of VM's which need to be converted from thick to thin format.

My query is if i convert VMs from thick to thin will i have Performance issues on Datastore and Storage team will see any performance issues from their end too..

Based on it i can plan converting Thick to Thin.

Note : - All the VM's are having Windows 7 (client operating system).

Thanks a ton in advance.