HPE Ezmeral Data Fabric 6.2 is In Maintenance and transitions to "End of Maintenance" in June 2024. Please see the latest documentation.

About Release 6.2
This site contains documentation for HPE Ezmeral Data Fabric release 6.2 including installation, configuration, administration, and reference content, as well as content for the associated bundled ecosystem components and drivers.
6.2 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.
6.2 Data Fabric
HPE Ezmeral Data Fabric is the industry-leading data platform for AI and analytics that solves enterprise business needs.
- HPE Ezmeral Data Fabric File Store
  HPE Ezmeral Data Fabric File Store is a distributed file system for data storage, data management, and data protection. File Store supports mounting and cluster access via NFS and FUSE-based POSIX clients (basic, platinum, or PACC) and also supports access and management via HDFS APIs.
- HPE Ezmeral Data Fabric Database
  HPE Ezmeral Data Fabric Database is an enterprise-grade, high-performance, NoSQL database management system that you can use for real-time, operational analytics.
- HPE Ezmeral Data Fabric Streams
  HPE Ezmeral Data Fabric Streams brings integrated publish and subscribe messaging to the Data Fabric Converged Data Platform.
- Kubernetes Interfaces for Data Fabric
  This section describes the Kubernetes Interfaces for Data Fabric, which include the Container Storage Interface (CSI) driver for multiple container-orchestration systems, and the FlexVolume driver for Kubernetes.
  - CSI Storage Plugin Overview
    This page describes how the Container Storage Interface (CSI) Storage Plugin can be used to expose the HPE Ezmeral Data Fabric to the containerized workload on Kubernetes.
    - Static vs. Dynamic Provisioning
      Explains static and dynamic volume provisioning using the CSI plugin.
    - Raw Block Volumes
      This page describes support for raw block volumes by the Container Storage Interface (CSI) Storage Plugin.
    - Comparing the FUSE POSIX and Loopback NFS Plugins
      This page compares the two types of Container Storage Interface (CSI) Storage Plugins and describes when to use them.
  - Kubernetes Interfaces for Data Fabric FlexVolume Driver
    Describes how the FlexVolume driver for Kubernetes Interfaces for Data Fabric integrates with Kubernetes to provide persistent data for containers.
- Cluster Management
  Provides a synopsis of the various cluster components and their management.
- Performance
  Describes how to tune system performance, manage RDMA, and optimize CLDB tables.
- Security
  Provides an overview of the data-fabric security features.
- YARN
- Client Connections
  The following sections describe how a client connects to local and remote data-fabric clusters.
6.2 Administration
This section describes how to manage the nodes and services that make up a cluster.
6.2 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.

Comparing the FUSE POSIX and Loopback NFS Plugins

This page compares the two types of Container Storage Interface (CSI) Storage Plugins and describes when to use them.

Features Common to Both Plugins

The FUSE POSIX and Loopback NFS plugins both support the following features:

Create a volume
Delete a volume
Expand a volume
Clone a volume
Create a snapshot
Delete a snapshot
Restore a snapshot

Current versions of both plugins include the release 6.2 binaries and can be used with releases 6.1 or 6.2. In addition, both plugins can exist on the same Kubernetes cluster at the same time. Both plugins can also be used without a license; however, the FUSE POSIX plugin provides a license parameter that allows you to control the number of resources used, as described in Example: Mounting a PersistentVolume for Static Provisioning.

How the Loopback NFS Plugin is Different

The Loopback NFS plugin leverages the loopbacknfs POSIX Client. For more information about this client, see HPE Ezmeral Data Fabric loopbacknfs POSIX Client.

The plugins differ in how they handle I/O. The Loopback NFS plugin uses asynchronous I/O, allowing more I/O operations. The Loopback NFS plugin also uses less memory and provides better performance for small-file writes and raw block storage.

How the FUSE POSIX Plugin is Different

The FUSE POSIX plugin leverages the FUSE-Based POSIX Client. For more information about this client, see HPE Ezmeral Data Fabric FUSE-Based POSIX Client.

The FUSE POSIX plugin uses synchronous I/O. FUSE POSIX runs with at most five clients (platinum license) and incurs resource overhead because of the high number of client threads, but works better for use cases that require high throughput.