Monitoring Jobs in the Cloud Cluster from Web Browser

Monitoring Jobs in the Cloud Cluster from Command Line

  • Log on to the login node
  • Run following cmd to get information (job id, user id and etc.) of all jobs running
    hadoop job -list
  • Run following cmd to get status about a specific job
    hadoop job -status your_job_id

Programmatically testing how much memory the JVM is using

Within a map reduce program, one can check how much memory the JVM has allocated (and how much remains free) through Java's Runtime class:

long allocatedJVMMemory = Runtime.getRuntime().totalMemory();

long freeJVMMemory = Runtime.getRuntime().freeMemory();


The following experimental interfaces are available as well:
Topic revision: r7 - 11 Mar 2011, KaiRen - This page was cached on 28 Jun 2017 - 22:48.

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