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.
- 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.
  - File System
    Discusses the features of the Data Fabric distributed file system and compares it to the Hadoop Distributed File System (HDFS).
    - Storage Pools
      Describes what storage pools are.
    - Containers and the CLDB
      Describes what containers are, and the role of the Container Location Database (CLDB) in managing them.
    - Volumes, Snapshots, and Mirrors
      Describes what Snapshots and Mirrors are, and the advantages of using them for replication.
    - Multitenancy on File System
      Describes what multitenancy is and how tenant data is kept private for each tenant.
  - Direct Access NFS
    Describes the Data Fabric direct access file system.
  - POSIX Clients
    Describes the usage of Data Fabric POSIX clients.
  - 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.
  - PACC
    This container gives you seamless access to HPE Ezmeral Data Fabric cluster services.
  - HPE Ezmeral Data Fabric Control System
    Provides a brief description of the HPE Ezmeral Data Fabric Control System.
  - Using HPE Ezmeral Data Fabric Monitoring (Spyglass Initiative)
    HPE Ezmeral Data Fabric Monitoring (part of the Spyglass initiative) provides the ability to collect, store, and view metrics and logs for nodes, services, and jobs/applications.
- HPE Ezmeral Data Fabric Object Store
  The HPE Ezmeral Data Fabric Object Store is a native object storage solution that efficiently stores objects and metadata for optimized access.
- 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.
- HPE Ezmeral Unified Analytics
  Describes the HPE Ezmeral Unified Analytics Software and provides a link to more information.
- 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.
- 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.
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.
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.

Storage Pools

Describes what storage pools are.

The file system storage architecture consists of multiple storage pools that reside on each node in a cluster. A storage pool is made up of one or more disks grouped by the data-fabric file system. The default number of disks in a storage pool is three. The containers that hold the data-fabric filesystem data are stored in, and replicated among the storage pools in the cluster.

The following image represents disks grouped together to create storage pools that reside on a node:

Write operations within a storage pool are striped across disks to improve write performance. Stripe width and depth are configurable with the disksetup script. As the data-fabric filesystem performs data replication, you do not need to configure RAID.