Oracle, VMware and Extended Distance Oracle Real Application Clusters on vSphere Metro Storage Cluster
Nowadays a high availability cluster (for any kind of application) in a single data center is almost not enough to ensure the kind of availability a Mission Critical Application needs which support revenue generation.
Typical issues plaguing a data center may include local power outage, airplane crash, server room flooding etc.
Do we have a solution?
THE answer: a “Stretched” Cluster, or one that is distributed between multiple sites , as long as the distance between them is within 100kms / satisfy 5ms Round Trip Latency time requirement.
This architecture best fits especially in regards to distance, latency, and degree of protection it provides.
Site separation is great protection for some local disasters as mentioned above but not all. Disasters such as earthquakes, hurricanes, and regional floods may affect a much greater area.
For comprehensive protection against regional disasters including protection against corruptions, Oracle Data Guard and VMware Site Recovery Manager (SRM) can be combined with Extended distance Oracle RAC on vSphere Metro Storage Cluster, giving us both a Disaster Avoidance and a Disaster Recovery Solution.