diff options
Diffstat (limited to 'core/lib/hadoop-0.20.2/conf/capacity-scheduler.xml')
-rw-r--r-- | core/lib/hadoop-0.20.2/conf/capacity-scheduler.xml | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/core/lib/hadoop-0.20.2/conf/capacity-scheduler.xml b/core/lib/hadoop-0.20.2/conf/capacity-scheduler.xml new file mode 100644 index 0000000000..e35b335607 --- /dev/null +++ b/core/lib/hadoop-0.20.2/conf/capacity-scheduler.xml @@ -0,0 +1,98 @@ +<?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.capacity</name> + <value>100</value> + <description>Percentage of the number of slots in the cluster that are + to be available for jobs in this queue. + </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> + <property> + <name>mapred.capacity-scheduler.queue.default.maximum-initialized-jobs-per-user</name> + <value>2</value> + <description>The maximum number of jobs to be pre-initialized for a user + of the job queue. + </description> + </property> + + <!-- The default configuration settings for the capacity task scheduler --> + <!-- The default values would be applied to all the queues which don't have --> + <!-- the appropriate property for the particular queue --> + <property> + <name>mapred.capacity-scheduler.default-supports-priority</name> + <value>false</value> + <description>If true, priorities of jobs will be taken into + account in scheduling decisions by default in a job queue. + </description> + </property> + + <property> + <name>mapred.capacity-scheduler.default-minimum-user-limit-percent</name> + <value>100</value> + <description>The percentage of the resources limited to a particular user + for the job queue at any given point of time by default. + </description> + </property> + + <property> + <name>mapred.capacity-scheduler.default-maximum-initialized-jobs-per-user</name> + <value>2</value> + <description>The maximum number of jobs to be pre-initialized for a user + of the job queue. + </description> + </property> + + + <!-- Capacity scheduler Job Initialization configuration parameters --> + <property> + <name>mapred.capacity-scheduler.init-poll-interval</name> + <value>5000</value> + <description>The amount of time in miliseconds which is used to poll + the job queues for jobs to initialize. + </description> + </property> + <property> + <name>mapred.capacity-scheduler.init-worker-threads</name> + <value>5</value> + <description>Number of worker threads which would be used by + Initialization poller to initialize jobs in a set of queue. + If number mentioned in property is equal to number of job queues + then a single thread would initialize jobs in a queue. If lesser + then a thread would get a set of queues assigned. If the number + is greater then number of threads would be equal to number of + job queues. + </description> + </property> + +</configuration> |