Configuring the Cluster

Describes post-installation configuration tasks for HPE Ezmeral Data Fabric clusters.

After installing HPE Ezmeral Data Fabric core and any desired ecosystem components, you might need to perform additional tasks to ready the cluster for production. To learn more about configuring clusters, see this course.

Configure the OJAI Distributed Query Service If you want to use the optional OJAI Distributed Query Service, you must install Drill and configure and register the service.
Setting up Topology The locations of nodes and racks in a cluster determine the location of replicated copies of data. Optimally defined cluster topology results in data being replicated to separate racks, providing continued data availability in the event of rack or node failure.
Setting Up Volumes Keeping volume hierarchy efficient to maximize data availability. Without a volume structure in place, performance will be negatively affected. Referring to the volume plan created in Planning the Cluster, use the Control System or the maprcli command to create and mount distinct volumes to allow more granularity in specifying policy for subsets of data. If you do not set up volumes, and instead store all data in the single volume mounted at /, it creates problems in administering data policy later as data size grows.
Designating NICs for HPE Ezmeral Data Fabric If multiple NICs are present on nodes, you can configure HPE Ezmeral Data Fabric to use one or more of them, depending on the cluster's need for bandwidth. See Cluster Design Objectives for more information.
Setting up NFS Access data on a licensed HPE Ezmeral Data Fabric cluster, mount the HPE Ezmeral Data Fabric cluster, and use standard shell scripting to read and write live data through NFS, which can be faster than using hadoop fs commands.
Configuring Authentication If you use Kerberos, LDAP, or another authentication scheme, make sure PAM is configured correctly to grant HPE Ezmeral Data Fabric access.
Configuring Permissions By default, users are able to log on to the Control System, but do not have permission to perform any actions. You can grant specific permissions to individual users and groups.
Setting Usage Quotas You can set specific quotas for individual users and groups.
Configuring Alarm Notifications If an alarm is raised on the cluster, HPE Ezmeral Data Fabric sends an email notification. For example, if a volume goes over its allotted quota, HPE Ezmeral Data Fabric raises an alarm and sends an email to the volume creator.
Setting Up the Client and MapR POSIX Client You can access the cluster either by logging into a node on the cluster, or by installing HPE Ezmeral Data Fabric client software on a machine with access to the cluster's network.
Working with Mirror Volumes To access multiple clusters or mirror data between clusters, work with mirror volumes.