Server Fault is a question and answer site for system and network administrators. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

For a relatively small, one terabyte cluster ( 2TB actual after replication ) I was trying to nail down what the namenode's ideal memory/cpu size would be, having worked with hadoop off and on as an end-user I can't imagine it being too crazy... but googling for hadoop minimum requirements hasn't given any definite answers or even a recommend server setup.

share|improve this question
up vote 1 down vote accepted

It's going to depend more upon how many files you have in HDFS. The rule of thumb is that the namenode process itself needs about 1GB of memory per one million objects (files, directories, blocks) held in the DFS. The CPU needs should be marginal. has a decent overview of some of these things to take into account.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.