text: # Copyright 2007 The Apache Software Foundation
  # 
  # 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 environment variables here.
  
  # This script sets variables multiple times over the course of starting an hbase process,
  # so try to keep things idempotent unless you want to take an even deeper look
  # into the startup scripts (bin/hbase, etc.)
  
  # The java implementation to use.  Java 1.6 required.
  export JAVA_HOME=/usr/lib/jvm/java-7-openjdk-amd64
  
  # Extra Java CLASSPATH elements.  Optional.
  # export HBASE_CLASSPATH=
  
  # The maximum amount of heap to use, in MB. Default is 1000.
  # export HBASE_HEAPSIZE=1000
  
  # Extra Java runtime options.
  # Below are what we set by default.  May only work with SUN JVM.
  # For more on why as well as other possible settings,
  # see http://wiki.apache.org/hadoop/PerformanceTuning
  export HBASE_OPTS="-XX:+UseConcMarkSweepGC"
  
  # Uncomment one of the below three options to enable java garbage collection logging for the server-side processes.
  
  # This enables basic gc logging to the .out file.
  # export SERVER_GC_OPTS="-verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps"
  
  # This enables basic gc logging to its own file.
  # If FILE-PATH is not replaced, the log file(.gc) would still be generated in the HBASE_LOG_DIR .
  # export SERVER_GC_OPTS="-verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:<FILE-PATH>"
  
  # This enables basic GC logging to its own file with automatic log rolling. Only applies to jdk 1.6.0_34+ and 1.7.0_2+.
  # If FILE-PATH is not replaced, the log file(.gc) would still be generated in the HBASE_LOG_DIR .
  # export SERVER_GC_OPTS="-verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:<FILE-PATH> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=1 -XX:GCLogFileSize=512M"
  
  # Uncomment one of the below three options to enable java garbage collection logging for the client processes.
  
  # This enables basic gc logging to the .out file.
  # export CLIENT_GC_OPTS="-verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps"
  
  # This enables basic gc logging to its own file.
  # If FILE-PATH is not replaced, the log file(.gc) would still be generated in the HBASE_LOG_DIR .
  # export CLIENT_GC_OPTS="-verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:<FILE-PATH>"
  
  # This enables basic GC logging to its own file with automatic log rolling. Only applies to jdk 1.6.0_34+ and 1.7.0_2+.
  # If FILE-PATH is not replaced, the log file(.gc) would still be generated in the HBASE_LOG_DIR .
  # export CLIENT_GC_OPTS="-verbose:gc -XX:+PrintGCDetails -XX:+PrintGCDateStamps -Xloggc:<FILE-PATH> -XX:+UseGCLogFileRotation -XX:NumberOfGCLogFiles=1 -XX:GCLogFileSize=512M"
  
  # Uncomment below if you intend to use the EXPERIMENTAL off heap cache.
  # export HBASE_OPTS="$HBASE_OPTS -XX:MaxDirectMemorySize="
  # Set hbase.offheapcache.percentage in hbase-site.xml to a nonzero value.
  
  
  # Uncomment and adjust to enable JMX exporting
  # See jmxremote.password and jmxremote.access in $JRE_HOME/lib/management to configure remote password access.
  # More details at: http://java.sun.com/javase/6/docs/technotes/guides/management/agent.html
  # NOTE: HBase provides an alternative JMX implementation to fix the random ports issue, please see JMX
  # section in HBase Reference Guide for instructions.
  
  # export HBASE_JMX_BASE="-Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false"
  # export HBASE_MASTER_OPTS="$HBASE_MASTER_OPTS $HBASE_JMX_BASE -Dcom.sun.management.jmxremote.port=10101"
  # export HBASE_REGIONSERVER_OPTS="$HBASE_REGIONSERVER_OPTS $HBASE_JMX_BASE -Dcom.sun.management.jmxremote.port=10102"
  # export HBASE_THRIFT_OPTS="$HBASE_THRIFT_OPTS $HBASE_JMX_BASE -Dcom.sun.management.jmxremote.port=10103"
  # export HBASE_ZOOKEEPER_OPTS="$HBASE_ZOOKEEPER_OPTS $HBASE_JMX_BASE -Dcom.sun.management.jmxremote.port=10104"
  # export HBASE_REST_OPTS="$HBASE_REST_OPTS $HBASE_JMX_BASE -Dcom.sun.management.jmxremote.port=10105"
  
  # File naming hosts on which HRegionServers will run.  $HBASE_HOME/conf/regionservers by default.
  # export HBASE_REGIONSERVERS=${HBASE_HOME}/conf/regionservers
  
  # Uncomment and adjust to keep all the Region Server pages mapped to be memory resident
  #HBASE_REGIONSERVER_MLOCK=true
  #HBASE_REGIONSERVER_UID="hbase"
  
  # File naming hosts on which backup HMaster will run.  $HBASE_HOME/conf/backup-masters by default.
  # export HBASE_BACKUP_MASTERS=${HBASE_HOME}/conf/backup-masters
  
  # Extra ssh options.  Empty by default.
  # export HBASE_SSH_OPTS="-o ConnectTimeout=1 -o SendEnv=HBASE_CONF_DIR"
  
  # Where log files are stored.  $HBASE_HOME/logs by default.
  # export HBASE_LOG_DIR=${HBASE_HOME}/logs
  
  # Enable remote JDWP debugging of major HBase processes. Meant for Core Developers 
  # export HBASE_MASTER_OPTS="$HBASE_MASTER_OPTS -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8070"
  # export HBASE_REGIONSERVER_OPTS="$HBASE_REGIONSERVER_OPTS -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8071"
  # export HBASE_THRIFT_OPTS="$HBASE_THRIFT_OPTS -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8072"
  # export HBASE_ZOOKEEPER_OPTS="$HBASE_ZOOKEEPER_OPTS -Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=8073"
  
  # A string representing this instance of hbase. $USER by default.
  # export HBASE_IDENT_STRING=$USER
  
  # The scheduling priority for daemon processes.  See 'man nice'.
  # export HBASE_NICENESS=10
  
  # The directory where pid files are stored. /tmp by default.
  # export HBASE_PID_DIR=/var/hadoop/pids
  
  # Seconds to sleep between slave commands.  Unset by default.  This
  # can be useful in large clusters, where, e.g., slave rsyncs can
  # otherwise arrive faster than the master can service them.
  # export HBASE_SLAVE_SLEEP=0.1
  
  # Tell HBase whether it should manage it's own instance of Zookeeper or not.
  # export HBASE_MANAGES_ZK=true
  
  # The default log rolling policy is RFA, where the log file is rolled as per the size defined for the 
  # RFA appender. Please refer to the log4j.properties file to see more details on this appender.
  # In case one needs to do log rolling on a date change, one should set the environment property
  # HBASE_ROOT_LOGGER to "<DESIRED_LOG LEVEL>,DRFA".
  # For example:
  # HBASE_ROOT_LOGGER=INFO,DRFA
  # The reason for changing default to RFA is to avoid the boundary case of filling out disk space as 
  # DRFA doesn't put any cap on the log size. Please refer to HBase-5655 for more context.
  