hadoop 配置文档

安装ssh
sudo apt-get install ssh

sudo apt-gert install rsync

ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa

yarn-site.xml

yarn.nodemanager.aux-services
mapreduce_shuffle


yarn.nodemanager.aux-services.mapreduce.shuffle.class
org.apache.hadoop.mapred.ShuffleHandler

---

mapred-site.xml

mapreduce.framework.name
yarn

---

core-site.xml

fs.default.name
hdfs://localhost:9000

---

hadoop-env.sh

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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.

Set Hadoop-specific environment variables here.

The only required environment variable is JAVA_HOME. All others are

optional. When running a distributed configuration it is best to

set JAVA_HOME in this file, so that it is correctly defined on

remote nodes.

The java implementation to use.

export JAVA_HOME=${JAVA_HOME}

export JAVA_HOME=/usr/lib/jvm/java-8-oracle

The jsvc implementation to use. Jsvc is required to run secure datanodes

that bind to privileged ports to provide authentication of data transfer

protocol. Jsvc is not required if SASL is configured for authentication of

data transfer protocol using non-privileged ports.

export JSVC_HOME=${JSVC_HOME}

export HADOOP_CONF_DIR=${HADOOP_CONF_DIR:-"/etc/hadoop"}

Extra Java CLASSPATH elements. Automatically insert capacity-scheduler.

for f in $HADOOP_HOME/contrib/capacity-scheduler/*.jar; do
if [ "$HADOOP_CLASSPATH" ]; then
export HADOOP_CLASSPATH=$HADOOP_CLASSPATH:$f
else
export HADOOP_CLASSPATH=$f
fi
done

The maximum amount of heap to use, in MB. Default is 1000.

export HADOOP_HEAPSIZE=

export HADOOP_NAMENODE_INIT_HEAPSIZE=""

Extra Java runtime options. Empty by default.

export HADOOP_OPTS="$HADOOP_OPTS -Djava.net.preferIPv4Stack=true"

Command specific options appended to HADOOP_OPTS when specified

export HADOOP_NAMENODE_OPTS="-Dhadoop.security.logger=${HADOOP_SECURITY_LOGGER:-INFO,RFAS} -Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER:-INFO,NullAppender} $HADOOP_NAMENODE_OPTS"
export HADOOP_DATANODE_OPTS="-Dhadoop.security.logger=ERROR,RFAS $HADOOP_DATANODE_OPTS"

export HADOOP_SECONDARYNAMENODE_OPTS="-Dhadoop.security.logger=${HADOOP_SECURITY_LOGGER:-INFO,RFAS} -Dhdfs.audit.logger=${HDFS_AUDIT_LOGGER:-INFO,NullAppender} $HADOOP_SECONDARYNAMENODE_OPTS"

export HADOOP_NFS3_OPTS="$HADOOP_NFS3_OPTS"
export HADOOP_PORTMAP_OPTS="-Xmx512m $HADOOP_PORTMAP_OPTS"

The following applies to multiple commands (fs, dfs, fsck, distcp etc)

export HADOOP_CLIENT_OPTS="-Xmx512m $HADOOP_CLIENT_OPTS"

HADOOP_JAVA_PLATFORM_OPTS="-XX:-UsePerfData $HADOOP_JAVA_PLATFORM_OPTS"

On secure datanodes, user to run the datanode as after dropping privileges.

This MUST be uncommented to enable secure HDFS if using privileged ports

to provide authentication of data transfer protocol. This MUST NOT be

defined if SASL is configured for authentication of data transfer protocol

using non-privileged ports.

export HADOOP_SECURE_DN_USER=${HADOOP_SECURE_DN_USER}

Where log files are stored. $HADOOP_HOME/logs by default.

export HADOOP_LOG_DIR=${HADOOP_LOG_DIR}/$USER

Where log files are stored in the secure data environment.

export HADOOP_SECURE_DN_LOG_DIR=${HADOOP_LOG_DIR}/${HADOOP_HDFS_USER}

HDFS Mover specific parameters

Specify the JVM options to be used when starting the HDFS Mover.

These options will be appended to the options specified as HADOOP_OPTS

and therefore may override any similar flags set in HADOOP_OPTS

export HADOOP_MOVER_OPTS=""

Advanced Users Only!

The directory where pid files are stored. /tmp by default.

NOTE: this should be set to a directory that can only be written to by

the user that will run the hadoop daemons. Otherwise there is the

potential for a symlink attack.

export HADOOP_PID_DIR=${HADOOP_PID_DIR}
export HADOOP_SECURE_DN_PID_DIR=${HADOOP_PID_DIR}

A string representing this instance of hadoop. $USER by default.

export HADOOP_IDENT_STRING=$USER