To deploy, configure, manage and scale Hadoop clusters in a way that
optimizes performance and resource utilization there is a lot to consider.
The 6 aspects presented in the post: OS, MapReduce slots available across nodes, memory, storage, capacity, network. It would be a lot more useful to put these in some order based on the scenarios the Hadoop cluster will have to solve.
Original title and link: 6 Key Hardware Considerations for Deploying Hadoop in Your Environment ( ©myNoSQL)