HBase table affinity to host(s)

[Brennon Church]

I'm curious, is there any concept of hosting regions from a given table 
only on a single host or subset of hosts in a cluster?  In our case we 
have a heavily-used table that can cause problems for the older systems 
in our cluster.  Newer systems would have less trouble, so I'd like to 
restrict regions for that one table only to those more powerful servers.

Thanks.
--Brennon