大数据平台搭建（hadoop+spark）

secce

# 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.
　　# 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.
　　#配置jdk的环境
　　export JAVA_HOME=/usr/local/jdk1.8.0_111
　　# 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>　　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