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.
- Administering Users and Clusters
  Lists topics that help manage a data-fabric cluster.
- Administering Nodes
  Provides a synopsis of managing nodes in a cluster.
- Administering Volumes
  This section provide information about how to organize and manage data using volumes, a unique feature of HPE Ezmeral Data Fabric clusters.
- Administering Files and Directories
- Administering Tables
  Administration of the HPE Ezmeral Data Fabric Database is done primarily via the command line (maprcli) or with the Managed Control System (MCS). Regardless of whether the HPE Ezmeral Data Fabric Database table is used for binary files or JSON documents, the same types of commands are used with slightly different parameter options. HPE Ezmeral Data Fabric Database administration is associated with tables, columns and column families, and table regions.
- Administering Streams
- Administering Data Fabric Gateways
  A HPE Ezmeral Data Fabric gateway mediates one-way communication between a source HPE Ezmeral Data Fabric cluster and a destination cluster. You can replicate HPE Ezmeral Data Fabric Database tables (binary and JSON) and HPE Ezmeral Data Fabric Streams streams. HPE Ezmeral Data Fabric gateways also apply updates from JSON tables to their secondary indexes and propagate Change Data Capture (CDC) logs.
- Administering Services
- Monitoring the Cluster
  This section describes how to monitor the health and performance of a MapR cluster.
- Configuring Security
  Describes how to configure security and manage secure clusters.
  - Configuring Data Fabric Security
    Provides usage information for frequently used security functionality, including Access Control Lists (ACLs), Access Control Expressions (ACEs), file permissions, and subnet allowlisting.
    - Getting Started with HPE Ezmeral Data Fabric Security
      Describes quick implementation of security.
    - Managing Encryption
      Provides information that allows you to use encryption across the HPE Ezmeral Data Fabric platform.
    - Determining if a Cluster is Secure and Enabled for Encryption
      Explains how to use the Control System, the CLI, and REST API to determine whether a cluster is secure and whether on-wire encryption and data-at-rest encryption are enabled at the cluster and volume levels.
    - Managing FIPS Security
      The topics in this section describe how to learn about and manage your FIPS configuration.
    - Configuring Authentication
      Provides information about Data Fabric tickets, Kerberos, Pluggable Authentication Module (PAM) authentication.
    - Managing Access Controls
      Describes how to create, enable, and use ACLs and ACEs.
      - Managing Access Control Lists
        Defines and describes how to create ACLs.
      - Managing Access Control Expressions
        Defines and describes how to create, enable, and use ACEs.
        ACE Syntax
        Describes how to construct ACEs.
        Creating User Roles for ACEs
        Describes how to create and use roles for access control.
        Enabling Volume, Directory, and File Authorizations with ACEs
        Describes how to set access control expressions for volumes, directories and files.
        Managing File and Directory ACEs
        Describes the implications of setting access control expressions (ACEs) on files and directories.
        Managing Whole Volume ACEs
        Describes how to grant permissions to users, groups, and roles for the volume data using whole volume ACEs.
        Setting Whole Volume ACEs
        Describes how to set ACE expressions when creating or modifying volumes.
        Deleting Whole Volume ACEs
        Enabling Table and Stream Authorizations with ACEs
        Defining ACEs Using the Access Control Expression Builder
        Describes how to build ACEs using the Expression Builder.
        Setting Data ACEs
        Describes how to set ACEs using both the GUI and the CLI.
        Granting Access Using Security Policy
        Describes how to grant access to objects using ACEs in a security policy.
      - Creating Subnet Whitelists
        Provides the procedure necessary to restrict access to cluster data.
    - Configuring Policy-Based Security
      Starting in HPE Ezmeral Data Fabric 6.2.0 (EEP 7.0.0), HPE Ezmeral Data Fabric supports Policy-Based Security. Policy-Based Security is a mechanism that enables administrators to create security policies for simplified data management. Administrative users can create and manage security policies through the control system, maprcli, REST API, Hadoop and Linux commands, and Java APIs.
    - Customizing Security in HPE Ezmeral Data Fabric
      Describes the .customSecure file and how HPE Ezmeral Data Fabric 6.x handles custom security settings.
  - Managing Impersonation
    Provides instructions for enabling and using Data Fabric impersonation features.
- Managing Secure Clusters
  Provides procedures that will enable you to use MapR clusters securely.
- Administering the Data Access Gateway
  The HPE Ezmeral Data Fabric Data Access Gateway is a service that acts as a proxy and gateway for translating requests between lightweight client applications and the HPE Ezmeral Data Fabric cluster. This section describes considerations when upgrading the service, how to modify configuration settings, and how to administer and manage the service.
- Planning for High Availability
- Administrator's Reference
  This section contains in-depth reference information for the administrator.
- Troubleshooting Cluster Administration
  Lists the common errors and their solutions.
- Best Practices for Backing Up HPE Ezmeral Data Fabric Information
  Lists the best practices and performance considerations to follow when backing up HPE Ezmeral Data Fabric information.
- IPv6 Support in Data Fabric
  Describes the IPv6 support feature for Data Fabric.
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.
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.

Managing Whole Volume ACEs

Describes how to grant permissions to users, groups, and roles for the volume data using whole volume ACEs.

Whole volume Access Control Expression (ACE)s allow you to define allowlists to grant access and denylists to deny access for files and tables within a volume.

Volume administrators and mapr user can set and modify whole volume ACEs. By default, ACEs grant everyone access to read and write to files and tables in the volume at the volume-level. Inside the volume, to determine access for:

Files, the file ACEs or POSIX mode bits are used.
Tables, the table ACEs are used.

Supported Access Types

At the volume level, the following access types are supported:

Access Type	Description
-readAce	Read files, HPE Ezmeral Data Fabric Database binary tables, HPE Ezmeral Data Fabric Database JSON tables, and MapR streams in the volume. By default, this is set to `p` to grant all users this permission.
-writeAce	Write to files, HPE Ezmeral Data Fabric Database binary tables, HPE Ezmeral Data Fabric Database JSON tables, and MapR streams in the volume. By default, this is set to `p` to grant all users this permission.

ACE Behavior on Snapshots and Mirrors

Volume Snapshots

Volume snapshots reflect the ACEs of the volume at that point in time. Changes in volume ACEs:

Are carried over to a new snapshot of the volume.
Do not propagate to older snapshots of the volume.

Volume Mirrors

ACEs of a volume are propagated to mirror volumes. After each mirroring operation, mirror volumes reflect the current ACE setting of their source volume. After a mirror volume is promoted to a read-write volume, you can modify the ACEs on the mirror volume from the command line. ACEs on the promoted mirror volume can be different from the source volume.