HW imbalance

[Antony Mayi]

Hi,
is it possible to mix hosts with (significantly) different specs within a 
cluster (without wasting the extra resources)? for example having 10 nodes with 
36GB RAM/10CPUs now trying to add 3 hosts with 128GB/10CPUs - is there a way to 
utilize the extra memory by spark executors (as my understanding is all spark 
executors must have same memory).
thanks,Antony.