Which quest operating system supports PVRDMA?
A.
Windows (32-Bit)
B.
Linux (32-Bit)
C.
Windows (64-Bit)
D.
Linux (64-Bit)
Explanation:
The guest operating system that supports PVRDMA is Linux 64 bit.
https://docs.vmware.com/en/VMware-vSphere/6.5/com.vmware.vsphere.networking.doc/GUID-
4A5EBD44-FB1E-4A83-BB47-BBC65181E1C2.html
Correct D
https://kb.vmware.com/s/article/2147694
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Correct answer is indeed D.
More info on paravirtual remote direct memory access (PVRDMA):
https://kb.vmware.com/s/article/2147694
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A paravirtual RDMA (PVRDMA) device is a virtual NIC that implements RDMA and supports the Verbs API.
ESXi 6.5 hosts support PVRDMA for Linux virtual machines of hardware version 13 or later, if the kernel supports RDMA and the PVRDMA module is installed in the OS. Additionally the virtual machine must be configured with vSphere Distributed Switch. Currently PVRDMA is not supported for Windows virtual machines.
Remote Direct Memory Access (RDMA) is a technology that allows computers in a network to exchange data in main memory without involving the processor, cache or operating system of either computer. Like locally based Direct Memory Access (DMA), RDMA improves throughput and performance because it frees up resources. RDMA also facilitates a faster data transfer rate and low-latency networking. It can be implemented for networking and storage applications.
RDMA enables more direct data movement in and out of a server by implementing a transport protocol in the network interface card (NIC) hardware. The technology supports a feature called zero-copy networking that makes it possible to read data directly from the main memory of one computer and write that data directly to the main memory of another computer.
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