Data protection overview

A PowerScale cluster is designed to serve data even when components fail. By default, OneFS protects data with erasure codes, enabling you to retrieve files when a node or disk fails. As an alternative to erasure codes, you can protect data with two to eight mirrors.

When you create a cluster with five or more nodes, erasure codes deliver as much as 80 percent efficiency. On larger clusters, erasure codes provide as much as four levels of redundancy.

OneFS includes the following features to help protect the integrity, availability, and confidentiality of data:

Feature Description
Anti-virus OneFS can send files to servers running the Internet Content Adaptation Protocol (ICAP) or Common AntiVirus Agent (CAVA) to scan for viruses and other threats.
Clones OneFS enables you to create clones that share blocks with other files to save space.
NDMP backup and restore OneFS can back up data to tape and other devices through the Network Data Management Protocol. Although OneFS supports both three-way and two-way backup, two-way backup requires a PowerScale Backup Accelerator Node.
Protection domains You can apply protection domains to files and directories to prevent changes.

The following software modules help protect data, but you must activate a separate license to use them:

Licensed Feature Description
SyncIQ SyncIQ replicates data on another PowerScale cluster and automates failover and failback operations between clusters. If a cluster becomes unusable, you can fail over to another PowerScale cluster .
SnapshotIQ You can protect data with a snapshot—a logical copy of data that is stored on a cluster.
SmartLock The SmartLock tool prevents users from modifying and deleting files. You can commit files to a write-once, read-many state: The file can never be modified and cannot be deleted until after a set retention period. SmartLock can help you comply with Securities and Exchange Commission Rule 17a-4.
CloudPools CloudPools extends the capabilities of OneFS by moving data to lower-cost cloud storage. You can move older or seldom-used data to cloud storage and free up space on your cluster. CloudPools supports several cloud storage providers.