Question

I am building a hadoop cluster. I have 3 racks, each rack consists several virtual machines.
How to config hadoop to let it have rack awareness? Some suggest using “topology.script.file.name” to set a script?

Can you write me an working example of doing it?

For example:

rack1: 192.168.1.1, 192.168.1.2, 192.168.1.3 
rack2: 192.168.1.4, 192.168.1.5, 192.168.1.6 
rack3: 192.168.1.7, 192.168.1.8, 192.168.1.9 

Thanks very much

Answer 1

Just give them other subnets, like rack1 192.168.1.*, rack2 192.168.2.* and so on. Hadoop will recognize this.