when I tried to add host to cluster , during the wizard it asked me about Virtual Machine Resources , first option "Put all of this host's virtual machines in the cluster's root resource pool , resource pools currently present on the host will be deleted"
second option is "Create a new resource pool for this host 's virtual machines and resource pools , this preserves thehost's current resource pool hierachy" , I didn't configure any RP in my cluster , so which option I have to choose"