| <?xml version="1.0"?> |
| |
| <!-- This is the configuration file for the resource manager in Hadoop. --> |
| <!-- You can configure various scheduling parameters related to queues. --> |
| <!-- The properties for a queue follow a naming convention,such as, --> |
| <!-- mapred.capacity-scheduler.queue.<queue-name>.property-name. --> |
| |
| <configuration> |
| |
| <property> |
| <name>mapred.capacity-scheduler.queue.default.guaranteed-capacity</name> |
| <value>100</value> |
| <description>Percentage of the number of slots in the cluster that are |
| guaranteed to be available for jobs in this queue. |
| </description> |
| </property> |
| |
| <property> |
| <name>mapred.capacity-scheduler.queue.default.reclaim-time-limit</name> |
| <value>300</value> |
| <description>The amount of time, in seconds, before which |
| resources distributed to other queues will be reclaimed. |
| </description> |
| </property> |
| |
| <property> |
| <name>mapred.capacity-scheduler.queue.default.supports-priority</name> |
| <value>false</value> |
| <description>If true, priorities of jobs will be taken into |
| account in scheduling decisions. |
| </description> |
| </property> |
| |
| <property> |
| <name>mapred.capacity-scheduler.queue.default.minimum-user-limit-percent</name> |
| <value>100</value> |
| <description> Each queue enforces a limit on the percentage of resources |
| allocated to a user at any given time, if there is competition for them. |
| This user limit can vary between a minimum and maximum value. The former |
| depends on the number of users who have submitted jobs, and the latter is |
| set to this property value. For example, suppose the value of this |
| property is 25. If two users have submitted jobs to a queue, no single |
| user can use more than 50% of the queue resources. If a third user submits |
| a job, no single user can use more than 33% of the queue resources. With 4 |
| or more users, no user can use more than 25% of the queue's resources. A |
| value of 100 implies no user limits are imposed. |
| </description> |
| </property> |
| |
| </configuration> |