Fwd: failover and loadbalance for relayed requests

[Leandro]

Hi dhcp users: I have a few years working with isc dhcp, I would like to 
move my dhcp service scheme to a virtualized enviroment to provide HA 
and load balance on a relayed scheme. I would like to ask for some 
documentation to read and also ask for the dhcp isc failover 
capabilities and recommendations. I imagine to setup two servers for 
instance with lease database sync and two ips configured on the relays 
... is that possible ? how does iscp manage the leases db sync? also 
could think in a proxy or a load balancer but need to investigate and 
read a little bit more about it .... Ok ... that`s all ... any idea 
would be wellcome,
  Regards, Leandro.