Virtual Disk Servers on SPARC LDOMs

Hi All

How does the Virtual Disk Server really work?

Consider a basic server with a Primary and a handful of LDOMs that have a couple of disks each and do lots of I/O... Is there an actual performance benefit of having multiple virtual disk servers on the Primary?

Diagrams usually only show one disk and one LDOM as an example, but it was my understanding there is an LDC between the disk backend and the virtual disk client (guest disk) for every disk. ie, The vds just facilitates the LDC connection setup.

Or maybe all traffic goes through the vds ? Would that mean only one disk can pass traffic through at any one time (queued)? Why then wouldn't we just create a vds for every disk so that they can work with more parallelism? That idea doesnt seem to comes across in any guides I've found, suggesting thats not how it works.