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.