Hadoop-2.2.0中文文档——Hadoop MapReduce 下一代 —配置一个单节点集群

Mapreduce 包

你需从发布页面获得MapReduce tar包。若不能，你要将源码打成tar包。

$ mvn clean install -DskipTests $ cd hadoop-mapreduce-project $ mvn clean install assembly:assembly -Pnative

注意：你需要安装有protoc 2.5.0。

忽略本地建立mapreduce，你可以在maven中省略-Pnative参数。tar包应该在target/directory。

配置环境

假设你已经安装hadoop-common/hadoop-hdfs，并且输出了$HADOOP_COMMON_HOME/$HADOOP_HDFS_HOME，解压hadoop mapreduce 包，配置环境变量$HADOOP_MAPRED_HOME到要安装的目录。$HADOOP_YARN_HOME的配置和$HADOOP_MAPRED_HOME一样.

注意：下面的操作假设你已经运行了hdfs。

设置配置信息

要启动ResourceManager and NodeManager, 你必须升级配置。假设你的 $HADOOP_CONF_DIR是配置目录，并且已经安装了HDFS和core-site.xml。还有2个配置文件你必须设置mapred-site.xml和yarn-site.xml.

设置mapred-site.xml

添加下面的配置到你的mapred-site.xml.

mapreduce.cluster.temp.dir No description true mapreduce.cluster.local.dir No description true

设置yarn-site.xml

添加下面的配置到你的yarn-site.xml.

yarn.resourcemanager.resource-tracker.address host:port host is the hostname of the resource manager and port is the port on which the NodeManagers contact the Resource Manager. yarn.resourcemanager.scheduler.address host:port host is the hostname of the resourcemanager and port is the port on which the Applications in the cluster talk to the Resource Manager. yarn.resourcemanager.scheduler.class org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler In case you do not want to use the default scheduler yarn.resourcemanager.address host:port the host is the hostname of the ResourceManager and the port is the port on which the clients can talk to the Resource Manager. yarn.nodemanager.local-dirs the local directories used by the nodemanager yarn.nodemanager.address 0.0.0.0:port the nodemanagers bind to this port yarn.nodemanager.resource.memory-mb 10240 the amount of memory on the NodeManager in GB yarn.nodemanager.remote-app-log-dir /app-logs directory on hdfs where the application logs are moved to yarn.nodemanager.log-dirs the directories used by Nodemanagers as log directories yarn.nodemanager.aux-services mapreduce_shuffle shuffle service that needs to be set for Map Reduce to run

设置capacity-scheduler.xml

确保你放置根队列到capacity-scheduler.xml.

yarn.scheduler.capacity.root.queues unfunded,default yarn.scheduler.capacity.root.capacity 100 yarn.scheduler.capacity.root.unfunded.capacity 50 yarn.scheduler.capacity.root.default.capacity 50

运行守护进程

假设环境变量$HADOOP_COMMON_HOME,$HADOOP_HDFS_HOME,$HADOO_MAPRED_HOME,$HADOOP_YARN_HOME,$JAVA_HOME和$HADOOP_CONF_DIR已经设置正确。$$YARN_CONF_DIR 的设置同 $HADOOP_CONF_DIR。

运行ResourceManager 和 NodeManager 如下：

$ cd $HADOOP_MAPRED_HOME $ sbin/yarn-daemon.sh start resourcemanager $ sbin/yarn-daemon.sh start nodemanager

你应该启动和运行。你可以运行randomwriter如下：

$ $HADOOP_COMMON_HOME/bin/hadoop jar hadoop-examples.jar randomwriter out

祝你好运。