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git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1612449 13f79535-47bb-0310-9956-ffa450edef68 |
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bin | ||
conf | ||
dev-support | ||
hadoop-yarn-api | ||
hadoop-yarn-applications | ||
hadoop-yarn-client | ||
hadoop-yarn-common | ||
hadoop-yarn-server | ||
hadoop-yarn-site | ||
pom.xml | ||
README |
YARN (YET ANOTHER RESOURCE NEGOTIATOR or YARN Application Resource Negotiator) ------------------------------------------------------------------------------ Requirements ------------- Java: JDK 1.6 Maven: Maven 3 Setup ----- Install protobuf 2.5.0 (Download from http://code.google.com/p/protobuf/downloads/list) - install the protoc executable (configure, make, make install) - install the maven artifact (cd java; mvn install) Quick Maven Tips ---------------- clean workspace: mvn clean compile and test: mvn install skip tests: mvn install -DskipTests skip test execution but compile: mvn install -Dmaven.test.skip.exec=true clean and test: mvn clean install run selected test after compile: mvn test -Dtest=TestClassName (combined: mvn clean install -Dtest=TestClassName) create runnable binaries after install: mvn assembly:assembly -Pnative (combined: mvn clean install assembly:assembly -Pnative) Eclipse Projects ---------------- http://maven.apache.org/guides/mini/guide-ide-eclipse.html 1. Generate .project and .classpath files in all maven modules mvn eclipse:eclipse CAUTION: If the project structure has changed from your previous workspace, clean up all .project and .classpath files recursively. Then run: mvn eclipse:eclipse 2. Import the projects in eclipse. 3. Set the environment variable M2_REPO to point to your .m2/repository location. NetBeans Projects ----------------- NetBeans has builtin support of maven projects. Just "Open Project..." and everything is setup automatically. Verified with NetBeans 6.9.1. Custom Hadoop Dependencies -------------------------- By default Hadoop dependencies are specified in the top-level pom.xml properties section. One can override them via -Dhadoop-common.version=... on the command line. ~/.m2/settings.xml can also be used to specify these properties in different profiles, which is useful for IDEs. Modules ------- YARN consists of multiple modules. The modules are listed below as per the directory structure: hadoop-yarn-api - Yarn's cross platform external interface hadoop-yarn-common - Utilities which can be used by yarn clients and server hadoop-yarn-server - Implementation of the hadoop-yarn-api hadoop-yarn-server-common - APIs shared between resourcemanager and nodemanager hadoop-yarn-server-nodemanager (TaskTracker replacement) hadoop-yarn-server-resourcemanager (JobTracker replacement) Utilities for understanding the code ------------------------------------ Almost all of the yarn components as well as the mapreduce framework use state-machines for all the data objects. To understand those central pieces of the code, a visual representation of the state-machines helps much. You can first convert the state-machines into graphviz(.gv) format by running: mvn compile -Pvisualize Then you can use the dot program for generating directed graphs and convert the above .gv files to images. The graphviz package has the needed dot program and related utilites.For e.g., to generate png files you can run: dot -Tpng NodeManager.gv > NodeManager.png