Local Continuous Replication (LCR) in Exchange Server 2007

Local Continuous Replication (LCR) is a single server solution for high availability and total cost of ownership (TCO). The LCR makes a mimic (replica) of original database and log files to a separate set of disk or SAN/NAS. This replica copy sync is maintained with so called log replay or change propagation. This work by copying the production storage group transaction log files to the location of the LCR storage group. This is one the best method of recovery in disaster recovery situations as we can switch to the LCR copy within few seconds if production database is corrupted. It also reduces the number of regular backups.

Active copy is stored on the production storage group and passive copy is maintained on the separate set of disks. Passive copy can be activated as a production database any time, and mounted and made available to the clients.