SQL Server 2012 White Paper – Building a High Availability and Disaster Recovery Solution by Using Failover Cluster Instances and Availability Groups
I was reading white paper about “High Availability and Disaster Recovery” and found it very useful so thought to share it with my blog reader.
SQL Server 2012 AlwaysOn Failover Cluster Instances (FCI) and AlwaysOn Availability Groups provide a comprehensive high availability and disaster recovery solution. Prior to SQL Server 2012, many customers used FCIs to provide local high availability within a data center and database mirroring for disaster recovery to a remote data center. With SQL Server 2012, this design pattern can be replaced with an architecture that uses FCIs for high availability and availability groups for disaster recovery business requirements. Availability groups leverage Windows Server Failover Clustering (WSFC) functionality and enable multiple features not available in database mirroring. This paper details the key topology requirements of this specific design pattern, including asymmetric storage considerations, quorum model selection, quorum votes, steps required to build the environment, and a workflow illustrating how to handle a disaster recovery event in the new topology across participating job roles.
Read complete while paper from here.
Reference: Ritesh Shah
Note: Microsoft Books online is a default reference of all articles.