i wander if XEN support multiple driver domain
(as you know, a driver domain is the domain has backend driver.)
is it possible that a couple of backend driver place in multiple drvier
domain? (for example,a network backend driver places in driver domain1
and a block backend driver places in driver domain 2)
Yes, that ought to be able to work. By convention, net backends and block
backends reside in dom0. There's no reason why you can't also run several
other net backend and block backend domains. The domains can either have
frontends of their own (e.g. a firewall domain might have a net frontend and
a net backend), or they can access PCI devices directly. You can only have
one domain controlling any given PCI device.
You'll still need to give dom0 devices it can boot the system from initially
though!
Cheers,
Mark