I would start with VMware HCL www.vmware.com/go/hcl to check what is the tested/certified/supported PSP for the storage array. Mostly for Active/Active array Fixed PSP is recommended but if you your vendor supports Round Robin then you can use that also. Ensure that you are making the changes recommended by the storage vendor if you are using RR else use the default PSP that is available in VMware HCL.
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