Application are often run on nodes that are not part of the MapR Cluster. There are
many methods to connect to a MapR cluster; this section briefly describes each option.
- MapR Client
- The MapR client includes the libraries and utilities required on an edge node to perform
the following: connect to the cluster, submit MapReduce applications, submit YARN applications,
run hadoop fs commands, and run hadoop mfs commands. However, to run applications that
access data from HPE Ezmeral Data Fabric Database or HPE Ezmeral Data Fabric Event Store, you must configure additional dependencies. For
more information about the MapR client, see HPE Ezmeral Data FabricClient and How HPE Ezmeral Data Fabric Clients Connect to the Cluster.
Note: Although it is not recommended, you can include the
filesystem JAR file in the
application instead of installing the MapR client. However, there are caveats and
specific requirements to make this work. For information, see
Using the filesystem JAR to Connect to the Cluster.
- MapR Persistent Application Client Container (PACC)
- The MapR Persistent Application Client Container (PACC) is a Docker-based container
image that includes a container-optimized MapR client. The PACC provides seamless access
to MapR Converged Data Platform services, including filesystem, HPE Ezmeral Data Fabric Database, and HPE Ezmeral Data Fabric Event Store.
The PACC includes the POSIX client, the MapR client, and the libraries required to build
HPE Ezmeral Data Fabric Database and HPE Ezmeral Data Fabric Event Store applications. For more information, see About the Persistent Application Client Container (PACC).
- MapR POSIX Clients
- MapR POSIX clients enable app servers, web servers, and other client nodes and
applications to read and write directly and securely to the MapR filesystem. For more information
about the POSIX clients, see POSIX Clients and MapR POSIX Clients.
- MapR NFS Clients
- You can mount the cluster itself via NFS so that your applications can read and write
data directly. For more information, see Managing the HPE Ezmeral Data Fabric NFS Service.