If you have MapR, your system must meet the following additional
requirements.
- The MapR Client must be
installed and added to the
$PATH on all
non-MapR nodes that will host the Dgraph, Studio, and the
Transform Service (if different from Studio nodes). Note that the Client
isn't required on these nodes if they host any MapR processes.
For instructions on installing the MapR Client, see
Installing the MapR Client in MapR's
documentation.
- Pluggable authentication
modules (PAMs) must be disabled for the installation.
- The
yarn.resourcemanager.hostname property in
yarn-site.xml must be set to the fully-qualified
domain name (FQDN) of your YARN ResourceManager. For instructions on updating
this property, see
Updating the YARN ResourceManager configuration.
- The directories
/user/HDFS_DP_USER_DIR/<bdd> and
/user/HDFS_DP_USER_DIR/edp/data must be either
nonexistent or mounted with a volume.
HDFS_DP_USER_DIR is defined in BDD's configuration
file, and
<bdd> is be the name of the
bdd user.
- The directories
/opt/mapr/zkdata and
/opt/mapr/zookeeper/zookeeper-3.4.5/logs must have
their permissions set to 755.
- If you want to store your
Dgraph databases on MapR-FS, the directory defined by
DGRAPH_INDEX_DIR in BDD's configuration file must be
either nonexistent or mounted with a volume. Additionally, the MapR NFS service
must be installed on all nodes that will host the Dgraph. For more information,
see
HDFS.
- The required Spark,
ZooKeeper, and Hive patches must be installed as described in
Applying the MapR patches.
