Java tutorial
/**************************************************************** * Licensed to the AOS Community (AOS) under one or more * * contributor license agreements. See the NOTICE file * * distributed with this work for additional information * * regarding copyright ownership. The AOS 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. * ****************************************************************/ package io.aos.hadoop; import org.apache.hadoop.hdfs.server.namenode.NameNode; /** * hdfs namenode -format * * java * * -Dproc_namenode * -Xmx1000m * -Djava.net.preferIPv4Stack=true * -Dhadoop.log.dir=/opt/hadoop-3.0.0-SNAPSHOT/logs * -Dhadoop.log.file=hadoop.log * -Dhadoop.home.dir=/opt/hadoop-3.0.0-SNAPSHOT * -Dhadoop.id.str=eric * -Dhadoop.root.LOGGER=INFO,console * -Dhadoop.policy.file=hadoop-policy.xml * -Djava.net.preferIPv4Stack=true * -Dhadoop.security.LOGGER=INFO,RFAS * -Dhdfs.audit.LOGGER=INFO,NullAppender * -Dhadoop.security.LOGGER=INFO,NullAppender * * org.apache.hadoop.hdfs.server.namenode.NameNode -format AosHadoopCluster */ public class HdfsNameNodeFormatter { public static void main(String... args) throws Exception { NameNode.main(new String[] { "-format", "AosHadoopCluster" }); } }