restructurable multiprocessor architecture
If your host and guest operating system are targeted to the same processor architecture, then you can speed things up to near native performance using the QEMU accelerator (KQEMU).
So, one question you might be asking yourself is what processor architectures are supported?
In addition, the appearance of multiple-processor architectures supported by extremely fast motherboard architectures seems to make distributed file system issues a lesser priority.
New processor architectures continue to appear, and new research finds better ways to optimize and generate code.