Storage Node Vs Compute Node

Storage vs Compute Node

Compute Node

  • It's the computer or machine where you can execute actual business logic.
  • It has two parameters RAM and CPU.

Storage Node

  • It's the computer or machine to store the processing data where your file system resides
  • Generally, the compute and storage nodes you can find at one location.
  • It designates block storage.

Restrictions for Key and Value Class

  • The key and value classes have to be serialized by the framework. To make them serializable Hadoop provides a Writable interface.
  • As you know from the java itself that the key of the Map should be comparable, hence the key has to implement one more interface WritableComparable.

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