About Release 7.6.1
This site contains documentation for HPE Ezmeral Data Fabric release 7.6.1, including installation, configuration, administration, and reference content, as well as content for the associated ecosystem components and drivers.
7.6.1 Installation
This section contains information about installing and upgrading HPE Ezmeral Data Fabric software. It also contains information about how to migrate data and applications from an Apache Hadoop cluster to a HPE Ezmeral Data Fabric cluster.
7.6.1 Data Fabric
HPE Ezmeral Data Fabric is the industry-leading data platform for AI and analytics that solves enterprise business needs.
7.6.1 Administration
This section describes how to manage the nodes and services that make up a cluster.
7.6.1 Development
This section contains information related to application development for Ezmeral ecosystem components and HPE Ezmeral Data Fabric products, including the file system, Database (Key-Value and JSON), and Event Streams.
- Application Development Process
  Before you start developing applications on the HPE Ezmeral Data Fabric platform, consider how you will get the data into the platform, the storage format of the data, the type of processing or modeling that is required, and how the data will be accessed.
- File Store and Apps
  The following sections provide information about accessing the File Store with C and Java applications.
  - Copying Data from Apache Hadoop to a Data Fabric Cluster
    Describes the procedure to copy data from an Apache Hadoop to a Data Fabric cluster.
    - Copy Data Using the hdfs:// Protocol
      Describes the procedure to copy data from a HDFS cluster to a HPE Ezmeral Data Fabric cluster using the hdfs:// protocol.
    - Copying Data Using the webhdfs:// Protocol
      Describes how to copy data from a HDFS cluster to a HPE Ezmeral Data Fabric cluster using the webhdfs:// protocol.
    - Copying Data Using NFS for the HPE Ezmeral Data Fabric
      Describes how to copy files from one data-fabric cluster to another using NFS for the HPE Ezmeral Data Fabric.
  - Accessing the File System with C Applications
  - Accessing HPE Ezmeral Data Fabric File Store in Java Applications
- HPE Ezmeral Data Fabric Database and Apps
  This section contains information about developing client applications for JSON and key-value tables.
- Apache Kafka Wire Protocol Service
  HPE Ezmeral Data Fabric Streams supports Apache Kafka Wire Protocol Service. Apache Kafka Wire Protocol Service is a TCP/IP service that emulates a Kafka cluster backed by HPE Ezmeral Data Fabric Streams. The service makes it possible for Apache Kafka clients written in any programming language to access topics in HPE Ezmeral Data Fabric Streams.
- HPE Ezmeral Data Fabric Streams and Apps
  HPE Ezmeral Data Fabric Streams brings integrated publish and subscribe messaging to HPE Ezmeral Data Fabric.
- MapReduce and Apps
  This section contains information associated with developing YARN applications.
- Kubernetes Interfaces for Data Fabric
  This section describes how to leverage the capabilities of the Kubernetes Interfaces for Data Fabric.
- Ecosystem Components
  The following sections provide information about each open-source project that is supported by the HPE Ezmeral Data Fabric.
- Maven and the HPE Ezmeral Data Fabric
  This section discusses topics associated with Maven and the HPE Ezmeral Data Fabric.
- Developer's Reference
  This section contains in-depth information for the developer.
- API Documentation
  HPE Ezmeral Data Fabric supports public APIs for file system, HPE Ezmeral Data Fabric Database, and HPE Ezmeral Data Fabric Streams. These APIs are available for application-development purposes.
Other Docs
This section contains release-independent information, including: Installer documentation, Ecosystem release notes, interoperability matrices, security vulnerabilities, and links to other data-fabric version documentation.
Glossary
Definitions for commonly used terms in MapR Converged Data Platform environments.

Copy Data Using the hdfs:// Protocol

Describes the procedure to copy data from a HDFS cluster to a HPE Ezmeral Data Fabric cluster using the hdfs:// protocol.

Before you can copy data from an HDFS cluster to a HPE Ezmeral Data Fabric cluster using the hdfs:// protocol, you must configure the HPE Ezmeral Data Fabric cluster to access the HDFS cluster. To do this, complete the steps listed in Configuring a HPE Ezmeral Data Fabric Cluster to Access an HDFS Cluster for the security scenario that best describes your HDFS and HPE Ezmeral Data Fabric clusters, and then complete the steps listed under Verifying Access to an HDFS Cluster.

You also need the following information:

<NameNode> - the IP address or hostname of the NameNode in the HDFS cluster
<NameNode Port> - the port for connecting to the NameNode in the HDFS cluster
<HDFS path> - the path to the HDFS directory from which you plan to copy data
<Data Fabric File system path> - the path in the HPE Ezmeral Data Fabric cluster to which you plan to copy HDFS data
<file> - a file in the HDFS path

To copy data from HDFS to HPE Ezmeral Data Fabric file system using the hdfs:// protocol, complete the following steps:

Run the following Hadoop command to determine if the HPE Ezmeral Data Fabric cluster can read the contents of a file in a specified directory on the HDFS cluster:
```
hadoop fs -cat <NameNode>:<NameNode port>/<HDFS path>/<file>
```
Example
```
hadoop fs -cat hdfs://nn1:8020/user/sara/contents.xml
```
If the HPE Ezmeral Data Fabric cluster can read the contents of the file, run the distcp command to copy the data from the HDFS cluster to the HPE Ezmeral Data Fabric cluster:
```
hadoop distcp hdfs://<NameNode>:<NameNode Port>/<HDFS path> maprfs://<Data Fabric File system path>
```
Example
```
hadoop distcp hdfs://nn1:8020/user/sara maprfs:///user/sara
```