We have ESXi 6.5 in our environment. We’re looking at turning off DirectPath I/O for any VMXNET3 adapters. The VRA’s have it enabled. Is that by design? It is a ‘bug’ and turns on by default so we manually turn it off on our VM’s that we create.
Contara from Zerto Support.
The VRA is deployed with a VMXNET3 adapter, which is a 10 Gbps vNIC. A VRA cannot utilize multiple vNICs to improve throughput. This means that a single VRA is bound to 10 Gbps, or 1,250 MBps as a theoretical maximum.
Being that the VRA is limited to one vNIC, it seems DirectPath I/O is turned on by design to provide better performance? Looking for clarification. Thanks!
This is Kalsang from Zerto support.
Yes, DirectPath I/O is turned on by design to provide better performance.