Could you clarify - how can you confirm what?

If you meant to ask how to confirm if SNN works OK, you could check its log (it does log in INFO for every time it does a checkpoint successfully), or depending on the version, check its Web UI (default port 50090, IIRC).

As to the load point - what process is consuming the said load? Is it the SNN, or something else?

Per your process output though, what version of CDH are you using? Is it CDH3?