hadoop/hadoop-mapreduce-project/conf/capacity-scheduler.xml.temp...

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<?xml version="1.0"?>
<!--
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
-->
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<!-- This is one of the configuration files for capacity-scheduler
(org.apache.hadoop.mapred.CapacityTaskScheduler), a TaskScheduler
for Map/Reduce system. The other configuration file is
conf/mapred-queues.xml which it shares with the framework for
configuring queues in the system. -->
<!-- This file can be used to configure (1) job-initialization-poller
related properties and (2) the default values for various properties
for all the queues.-->
<configuration>
<!-- 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 configured in the -->
<!-- queue-configuration file conf/mapred-queues.xml -->
<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>