Customizing machines to use for different jobs

[Rakhi Khatwani]

Hi,

Can we specify which subset of machines to use for different jobs? E.g. We
set machine A as namenode, and B, C, D as datanodes. Then for job 1, we have
a mapreduce that runs on B & C and for job 2, the map-reduce runs on C & D.

Regards,
Raakhi