Exchange Server 2007 LCR Introduction

Microsoft Exchange Server 2007 has been published for some time, and there has been a significant improvement in high availability compared to previous versions of Exchange. The main embodiment is LCR (local continuous Replication) and CCR (Cluster continuous Replication) technology. We mainly look at the implementation of LCR technology.

LCR technology is a single server solution that enables high availability of mail databases in a single-server environment. It maintains a copy of the Exchange storage group in different areas of the same server through the built-in asynchronous log shipping technology. When there is a problem with the active copy of the storage group, we can switch to the passive copy in the shortest time, significantly reducing the database restore time. The principle of the following diagram:

Note: LCR is not a backup technology and deploying LCR does not mean that backups are no longer needed. The purpose of LCR is to significantly reduce the restore time of the Exchange database and not replace it. But we can extend the normal backup cycle.

Experimental environment:

Exchange Server 2007 + Windows Server 2003 R2

There is already a storage group before the start: SG3. Storage location: C:\SG3. And there is already a mailbox database in this storage group. C:\ a new folder SG3LCR to hold a copy of this storage group. The following figure: