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.
7.9.0 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 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.
  - Architecture
    HPE Ezmeral Data Fabric Database is an enterprise-grade, high performance, NoSQL (“Not Only SQL”) database management system. You can use it to add realtime, operational analytics capabilities to big data applications. As a multi-model NoSQL database, it supports both JSON document models and key-value data models.
  - Data Models
    HPE Ezmeral Data Fabric Database can be used as both a document database and a column-oriented database. As a document database, JSON documents are stored in HPE Ezmeral Data Fabric Database JSON table. As a column-oriented database, binary files are in stored HPE Ezmeral Data Fabric Database binary tables.
  - Secondary Indexes
    Beginning with data-fabric 6.0, HPE Ezmeral Data Fabric Database JSON natively supports secondary indexes on fields in JSON tables. Indexes provide you with flexible, high performance access to data stored in HPE Ezmeral Data Fabric Database.
  - Change Data Capture
    The Change Data Capture (CDC) system allows you to capture changes made to data records in HPE Ezmeral Data Fabric Database tables (JSON or binary) and propagate them to a HPE Ezmeral Data Fabric Streams topic.
  - Table Replication
    You can replicate data in one table to another table that is in the same cluster or in a separate cluster. This type of replication is in addition to the automatic replication that occurs with table regions within a volume.
    - Modes of replication
      Describes the asynchronous and synchronous modes of table replication.
    - Supported replication topologies
      Lists the primary-secondary and multi-master replication technologies.
    - Gateways for Replicating HPE Ezmeral Data Fabric Database Tables
      In HPE Ezmeral Data Fabric Database table replication, HPE Ezmeral Data Fabric Database replicates updates to tables (binary and JSON) on source Data Fabric clusters to replicas of those tables on destination Data Fabric clusters. Gateways are services that receive these updates and apply them to the replicas. These gateways also propagate updates from JSON tables to their secondary indexes.
    - Replica Autosetup for HPE Ezmeral Data Fabric Database Tables
      The option to automatically set up table replication, also known as replica autosetup, performs the steps to set up and start the replication of HPE Ezmeral Data Fabric Database binary table and HPE Ezmeral Data Fabric Database JSON tables. The replica autosetup option is available through the Control System and maprcli commands.
    - Table Replication States
      The replication state indicates when table replication is in progress and displays the status of operations related to replica autosetup.
    - Order of Writes at Replicas
    - Security and Replication
      Describes how to replicate data between secure clusters.
    - Licensing
      Describes the licensing requirements for data-fabric.
  - Gateways for Indexing HPE Ezmeral Data Fabric Database Data in Elasticsearch
    As of data-fabric 6.0, HPE Ezmeral Data Fabric Database Elastic Search integration capability is deprecated and no longer available in the HPE Ezmeral Data Fabric Database product.
- HPE Ezmeral Data Fabric Streams
  HPE Ezmeral Data Fabric Streams brings integrated publish and subscribe messaging to the HPE Ezmeral Data Fabric.
- 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.
7.9.0 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.

Table Replication

You can replicate data in one table to another table that is in the same cluster or in a separate cluster. This type of replication is in addition to the automatic replication that occurs with table regions within a volume.

You can replicate changes (puts and deletes), entire tables, specific column families, and specific columns.

Data Fabric binary tables can only be replicated to binary tables; Data Fabric JSON tables can only be replicated to JSON tables.

Tables from which data is replicated are called source tables. Tables to which the data is replicated are called replicas.
Clusters from which data is replicated are called source clusters. Clusters to which data is replicated are called destination clusters. A single cluster can be both a source cluster and a destination cluster, depending on the replication configuration in which the cluster participates.
Replication takes place between source and destination clusters. However, source clusters do not send data to nodes in the destination cluster directly. The replication stream (the data being pushed to the replicas) is consumed by one or more data-fabric gateways in the destination cluster. The gateways receive the updates from the source cluster, batch them, and apply them to the replica tables. Multiple gateways serve the purpose of both load balancing and failover.

For more information about gateways, see Administering Data Fabric Gateways.

The maximum number of replicas that a source table can replicate to is 64. The maximum number of source tables from which a replica can accept updates is 64.

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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