Definition

cloud storage gateway

A cloud storage gateway is a hardware- or software-based appliance located on the customer premises that serves as a bridge between local applications and remote cloud-based storage. The products are sometimes called cloud storage appliances or cloud storage controllers.

The need for a bridge between cloud storage systems and enterprise applications arose because of an incompatibility between public cloud technologies and legacy applications. Most public cloud providers rely on Internet protocols, usually a REST API over HTTP, rather than a conventional storage area network (SAN) or network-attached storage (NAS) protocol. That method is useful for programmers creating new applications but not compatible with legacy systems.

A cloud storage gateway provides basic protocol translation and simple connectivity to allow the incompatible technologies to communicate transparently. The gateway can make cloud storage appear to be a NAS filer, a block storage array, a backup target or even an extension of the application itself. Local storage is generally used as a cache for improved performance.

Cloud gateway product features include:

  • Encryption technology to safeguard data. 
  • Compression. Deduplication. 
  • WAN optimization for faster performance. 
  • Snapshots. 
  • Version control. 
  • Data protection.

See also: cloud storage, cloud storage API

This was last updated in May 2011
Posted by: Margaret Rouse

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