Chapter 10. Using VMDirectPath I/O
One of the least-known features introduced in vSphere 4.x that continues to be available in vSphere 5 and 6 is VMDirectPath I/O. This chapter explains what it is, shows how it works, and provides some practical design implementations. vSphere 6 also supports Single Root I/O Virtualization (SR-IOV), which offers performance benefits similar to those of VMDirectPath I/O.
What Is VMDirectPath?
Have you ever wanted to access a certain storage device directly from within a virtual machine (VM) but found that the devices was not raw device mapping (RDM) capable? Do you have a Fibre-attached tape library that you want to use within a VM and provide multipathing to it? Do you have an application that requires a specific ...