Monitoring Jobs in the Cloud Cluster from Web Browser

• Set up your browser's proxy as explained in the Cloud Faq Job Status Page.
• Click on the hadoop job tracker link

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:

• Hadoop resource usage
• HDFS space usage
• Compute nodes activity