Database Mirroring The Basics Christopher Shaw

What is Database Mirroring Clustering? Yes, if you think about it this way. Geographically disbursed. Database level not server. Transaction Log Based

Kinds of Mirroring Synchronous Asynchronous (EE) High Safety Changes are not commit until committed on both machines. Asynchronous (EE) High Performance Server does not wait for change to Propagate.

Principal – source or active database Mirror – destination or non-active database Witness – system that is a tie vote breaker Mirror (Recovering) Principal Witness

Simple Steps Backup Database Restore Database Backup Log Restore Log Create End Points Configure Mirror

Considerations Ease of Set up Auto failover with witness Mirror is not online Performance Enterprise Edition User Accounts

Questions