Environment Variables

The following table describes environment variables specific to MapR. Note that environment variables must be set in $MAPR_HOME/conf/env.sh.

Variable	Example Values	Description
`JAVA_HOME`	/usr/lib/jvm/java-7-sun	The directory where the correct version of Java is installed.
`MAPR_HOME`	/opt/mapr (default)	The directory in which MapR is installed.
`MAPR_SUBNETS`	10.10.123.0/24,10.10.124.0/24	If you do not want MapR to use all NICs on each node, use the environment variable MAPR_SUBNETS to restrict MapR traffic to specific NICs. Set MAPR_SUBNETS to a comma-separated list of up to four subnets in CIDR notation with no spaces. If MAPR_SUBNETS is not set, MapR uses all NICs present on the node. When MAPR_SUBNETS is set, make sure the node can reach all nodes in the cluster (servers and clients) using the specified subnets.
`MAPR_USER`	`mapr` (default)	Used with `configure.sh` to specify the user under which MapR runs its services. If not explicitly set, it defaults to the user `mapr`. After `configure.sh` is run, the value is stored in `daemon.conf`.
`MAPR_ECOSYSTEM_LOGIN_OPTS`	`hybrid`	Specifies the JAAS configuration to use with installed open source components.

Sample env.sh File

export JAVA_HOME=/usr/lib/jvm/java-7-sun
export MAPR_HOME=/opt/mapr
export MAPR_SUBNETS=10.10.123.0/24,10.10.124.0/24
export MAPR_USER=mapr
export MAPR_ECOSYSTEM_LOGIN_OPTS=*hybrid*