Introduced with the IBM® XIV® Storage System software v11.5, the multi-site mirroring function, also referred to as the 3-way mirroring in the XIV GUI, enables world-class high availability and disaster recovery capabilities. As such, the function also enables clients to comply with business, government, and industry-driven requirements and regulations.
Essentially, 3-way mirroring as implemented in XIV provides you with:
– Minimized risk for data outage, service availability, and low business impact in general
– Expedited failover and data restoration in the event of disaster
This paper describes the 3-way mirroring basic concepts, terminology, and practical usage. It contains several use cases (failover/failback scenarios) for disaster recovery.
3-way mirroring overview
3-way mirroring definition and terminology
3-way mirroring characteristics
Setting up 3-way mirroring
Disaster recovery scenarios with 3-way mirroring