[Clustering] Single VM spanning across multiple physical hosts ?

Folks,

Is it possible to allocate to VM more resources than single ESX host have in order to  build single big VM out of many physical hosts?

For instance I have two ESX hosts with 2GHz and 16 GB DRAM each.

Would it be possible to run SINGLE VM which will be granted 4GHz and 32GB DRAM ? Or maybe 4GHz and 20 GB DRAM (to "borrow" some resources from other Host).

I'm reading about clustering/DRS technology in vSphere and it's not said explicite that it's possible. We always have references to ESX hosts - to dynamicly relocate from one Host to another etc.... DRS is introducing "global" scheduler but I'm not sure whether it works that way.

Any good links are much appreciated !

Sebastian