Redundant Storage

How can the reliability and availability of cloud storage devices survive failure conditions?

Problem

When cloud storage devices fail or become inaccessible, cloud consumers are unable to access data and cloud services relying on access to the device may also fail.

Solution

A failsafe system comprised of redundant cloud storage devices is established so that when the primary device fails, the redundant secondary device takes its place.

Application

Data is replicated from the primary storage to the secondary storage device. A storage service gateway is used to redirect data access requests to the secondary storage device, when necessary.

Mechanisms

Cloud Storage Device, Container, Failover System, Resource Replication

Compound Patterns

Burst In, Burst Out to Private Cloud, Burst Out to Public Cloud, Cloud Authentication, Cloud Balancing, Elastic Environment, Infrastructure-as-a-Service (IaaS), Isolated Trust Boundary, Multitenant Environment, Platform-as-a-Service (PaaS), Private Cloud, Public Cloud, Resilient Environment, Resource Workload Management, Secure Burst Out to Private Cloud/Public Cloud, Software-as-a-Service (SaaS)

A sample scenario that demonstrates the effects of a failed cloud storage device.

NIST Reference Architecture Mapping

This pattern relates to the highlighted parts of the NIST reference architecture, as follows: