hadoop/bin/hdfs

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#!/usr/bin/env bash
# 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.
bin=`dirname "$0"`
bin=`cd "$bin"; pwd`
. "$bin"/hdfs-config.sh
function print_usage(){
echo "Usage: hdfs [--config confdir] COMMAND"
echo " where COMMAND is one of:"
echo " namenode -format format the DFS filesystem"
echo " secondarynamenode run the DFS secondary namenode"
echo " namenode run the DFS namenode"
echo " datanode run a DFS datanode"
echo " dfsadmin run a DFS admin client"
echo " fsck run a DFS filesystem checking utility"
echo " balancer run a cluster balancing utility"
echo " jmxget get JMX exported values from NameNode or DataNode."
echo " oiv apply the offline fsimage viewer to an fsimage"
echo " Use -help to see options"
echo ""
echo "Most commands print help when invoked w/o parameters."
}
if [ $# = 0 ]; then
print_usage
exit
fi
COMMAND=$1
shift
if [ "$COMMAND" = "namenode" ] ; then
CLASS='org.apache.hadoop.hdfs.server.namenode.NameNode'
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_NAMENODE_OPTS"
elif [ "$COMMAND" = "secondarynamenode" ] ; then
CLASS='org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode'
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_SECONDARYNAMENODE_OPTS"
elif [ "$COMMAND" = "datanode" ] ; then
CLASS='org.apache.hadoop.hdfs.server.datanode.DataNode'
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_DATANODE_OPTS"
elif [ "$COMMAND" = "dfs" ] ; then
CLASS=org.apache.hadoop.fs.FsShell
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
elif [ "$COMMAND" = "dfsadmin" ] ; then
CLASS=org.apache.hadoop.hdfs.tools.DFSAdmin
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
elif [ "$COMMAND" = "fsck" ] ; then
CLASS=org.apache.hadoop.hdfs.tools.DFSck
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_CLIENT_OPTS"
elif [ "$COMMAND" = "balancer" ] ; then
CLASS=org.apache.hadoop.hdfs.server.balancer.Balancer
HADOOP_OPTS="$HADOOP_OPTS $HADOOP_BALANCER_OPTS"
elif [ "$COMMAND" = "jmxget" ] ; then
CLASS=org.apache.hadoop.hdfs.tools.JMXGet
elif [ "$COMMAND" = "oiv" ] ; then
CLASS=org.apache.hadoop.hdfs.tools.offlineImageViewer.OfflineImageViewer
else
echo $COMMAND - invalid command
print_usage
exit
fi
# for developers, add hdfs classes to CLASSPATH
if [ -d "$HADOOP_HDFS_HOME/build/classes" ]; then
CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME/build/classes
fi
if [ -d "$HADOOP_HDFS_HOME/build/webapps" ]; then
CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME/build
fi
if [ -d "$HADOOP_HDFS_HOME/build/test/classes" ]; then
CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME/build/test/classes
fi
if [ -d "$HADOOP_HDFS_HOME/build/tools" ]; then
CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME/build/tools
fi
# for releases, add core hdfs jar & webapps to CLASSPATH
if [ -d "$HADOOP_HDFS_HOME/webapps" ]; then
CLASSPATH=${CLASSPATH}:$HADOOP_HDFS_HOME
fi
for f in $HADOOP_HDFS_HOME/hadoop-*-hdfs.jar; do
CLASSPATH=${CLASSPATH}:$f;
done
# add libs to CLASSPATH
for f in $HADOOP_HDFS_HOME/lib/*.jar; do
CLASSPATH=${CLASSPATH}:$f;
done
if $cygwin; then
CLASSPATH=`cygpath -p -w "$CLASSPATH"`
fi
exec "$JAVA" $JAVA_HEAP_MAX $HADOOP_OPTS -classpath "$CLASSPATH" $CLASS "$@"