About Release 7.9.0
This site contains documentation for HPE Ezmeral Data Fabric release 7.9.0, including installation, configuration, administration, and reference content, as well as content for the associated ecosystem components and drivers.
7.9.0 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.
- Planning the Cluster
  Describes information and factors used in planning your cluster.
- Installing Core and Ecosystem Components
  Describes how to install HPE Ezmeral Data Fabric software and ecosystem components with or without the Installer.
- Installing the HPE Ezmeral Data Fabric File Store
  Describes how to install File Store software with or without the Installer.
- Installing HPE Ezmeral Data Fabric Object Store
  Describes installation of the HPE Ezmeral Data Fabric Object Store software with or without the Installer.
- Installing Kubernetes Interfaces for Data Fabric
  This section describes how to plan for and install the Container Storage Interface (CSI) Storage Plugin and the Kubernetes Interfaces for Data Fabric FlexVolume Driver.
- Upgrading Core or EEP Components
  Depending on your current configuration, you may choose to upgrade the release version (core), ecosystem components, clients, or monitoring components.
- Setting Up Clients and Services
  Describes how to set up and use interfaces to an HPE Ezmeral Data Fabric cluster from a client computer.
- Setting Up the Control System
  Describes how to configure and access the Control System.
- Migrating to the HPE Ezmeral Data Fabric
  Provides instructions for migrating business-critical data and applications from an Apache Hadoop cluster to an HPE Ezmeral Data Fabric cluster.
- Applying a Patch
  You can apply a patch by using the Installer, by using the command line (a manual process), or by using an Installer Stanza.
  - Downloading a Patch
    Patches for the HPE Ezmeral Data Fabric can be downloaded from a secure FTP server.
  - Applying a Patch Using the Installer
    The Installer automates much of the work involved in applying patches.
  - Applying a Patch Manually
    HPE Ezmeral Data Fabric patches are version-specific and cumulative. Each patch contains the code fixes that were included in the previous patch for that release version.
    - Step 1: Verify Cluster Readiness for a Patch
      Before you apply a patch, check that the cluster is ready for a patch to be applied. In addition to the prerequisites, consider verifying that the cluster utilizes best practices which will facilitate a more optimal patch installation.
    - Step 2: Apply the Patch to Data Nodes
      When applying a patch manually, apply the patch to nodes dedicated to storing and processing data prior to applying the patch to nodes that run the CLDB. This includes nodes that run the Fileserver for storage and processing components such as the NodeManager and the HBase client.
    - Step 3: Apply the Patch to CLDB Nodes
      When applying a patch manually, apply the patch to CLDB secondary nodes prior to applying the patch on the primary CLDB node. After you apply a patch to a CLDB node, you must verify that container 1 is fully replicated before proceeding to apply the patch to the next CLDB node.
  - Applying a Patch Using an Installer Stanza
    Applying a patch using an Installer Stanza leverages the automation provided by the patch-install capability of the web-based Installer.
  - Rolling Back a Patch
    Removing a previously installed patch is a manual process. You can revert to a previous version of the patch by first removing the current patch and then installing the previous version.
  - Applying a Patch for an Ecosystem Component
    Patches for ecosystem components are handled differently from patches for Data Fabric core software.
  - Special Considerations for Control System Patches
    Patches for the Control System are handled differently from patches for cluster data nodes and CLDB nodes.
  - Special Considerations for FUSE POSIX Patches
    Patches for some features, such as the FUSE POSIX client, can require post-installation steps.
  - Applying a Patch to a POSIX Client
    This procedure enables you to apply a patch to any of the HPE Ezmeral Data Fabric POSIX clients, which include the loopbacknfs POSIX client, the FUSE-based POSIX basic client, and the FUSE-based POSIX platinum client.
7.9.0 Data Fabric
HPE Ezmeral Data Fabric is the industry-leading data platform for AI and analytics that solves enterprise business needs.
7.9.0 Administration
This section describes how to manage the nodes and services that make up a cluster.
7.9.0 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.
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.

Applying a Patch Manually

HPE Ezmeral Data Fabric patches are version-specific and cumulative. Each patch contains the code fixes that were included in the previous patch for that release version.

Before applying a patch, note these considerations:

For patch-download information, see Applying a Patch.
The steps for patching the Control System are different from the steps for patching core. See Special Considerations for Control System Patches.
You can also apply a patch using the Installer. See Applying a Patch Using the Installer.
A patch for a given software version can be removed, and an older patch for the same software version can be installed. However, rolling back a cluster from a newer release version to an older version is not supported.

Different types of patches are available, and some patches can only be installed on specific nodes:

Patch Type	Install on These Nodes
`mapr-patch`	All control and data nodes
`mapr-patch-client`	HPE Ezmeral Data Fabric client nodes only
`mapr-patch-loopbacknfs`	Any node where POSIX is supported
`mapr-patch-nfs4server`	Any node where NFSv4 is supported
`mapr-patch-posix-client-basic`	Any node where FUSE POSIX is supported
`mapr-patch-posix-client-platinum`	Any node where FUSE POSIX is supported

Applying a patch is a three-step process:

When you apply a patch to the cluster, the patched files along with original files (non-patched) are copied to the /opt/mapr/.patch folder. In the /opt/mapr/.patch folder, the file ending with .O is the original file (non-patched) and the file ending with .<patch_number> is the patched version. Therefore, if there is a file under /opt/mapr/.patch/lib/, you can compare that with the corresponding file under /opt/mapr/lib/ by using the md5sum command to verify that the patch was successfully deployed.

If you need more information or if you encounter any problems with patch installation, contact HPE Support.

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HPE Ezmeral Data Fabric – Customer-Managed 7.9.0 Documentation
Abstract	This site contains documentation for the customer-managed platform of the HPE Ezmeral Data Fabric version 7.9.0 including installation, configuration, administration, and reference content, as well as content for the associated bundled ecosystem components and drivers.
Published	November 2024
Edition	7.9.0