Database Reference
In-Depth Information
One last note, and then I will let you kids go play with your cluster and fly solo.
Why is it so important to choose the internal IP, also called the private DNS? Firstly,
because you won't be charged for every request. Normally, you get charged for
every request and transfer, but for internal transfers, this charge is zero, that is
free — nada! Secondly, recall that in our security group, all servers are allowed to
communicate with all other servers on all ports. So you won't have any problems
setting up your clusters, regardless of which ports the Hadoop services decide to
communicate on. If you don't do that, the install will fail on the next step. However,
if everything is correct, you will get this happy screen:
