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: