LUN Queue Depth on Emulex HBA

Because you reference schednumreqoutstanding parameter, i am assuming you are trying to achieve this in a VMware environment. For queue depth there are two settings that can be adjusted: LUN Queue Depth, and HBA Queue Depth (IO throttle count). For Emulex, XtremIO best practice recommendation is to set HBA Queue Depth to 8192(default), and Lun Queue depth to 128. However, since your vhbas also have VNX, you need to go with lowest value which would be of VNX. Therefore, you would set Lun Queue Depth to 32, and HBA queue depth (if same vhba as VNX) to the VNX one. However, since you are using Emulex, and Emulex HBAs typically have the driver for these HBAs preloaded with ESX, you can stay with the default of 8192.