MapR 5.1 is at End of Life (EOL) and no longer supported. Please see the latest documentation. This documentation is not being updated.

About MapR 5.1
This section contains an overview of the MapR software, information on the MapR Sandbox for Hadoop, and the MapR 5.1 Release notes..
- MapR System Overview
  - MapR File System
  - Cluster Management
  - Overview of MapR-DB
    MapR-DB is an enterprise-grade, high-performance, in-Hadoop, NoSQL (“Not Only SQL”) database management system. You can use it to add real-time, operational analytics capabilities to Hadoop.
  - Overview of MapR Streams
    MapR Streams brings integrated publish/subscribe messaging to the MapR Converged Data Platform.
  - Security
  - MapReduce Version 1
  - YARN
- MapR Sandbox for Hadoop
- Version 5.1 Release Notes

Storage Pools

MapR-FS 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 together by MapR-FS. The default number of disks in a storage pool is three. The containers that hold MapR-FS 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. Since MapR-FS performs data replication, RAID configuration is unnecessary.