Computer Associates BABWBR1151S40 User Guide - Page 13

How Single Instance Storage Works ■ Exchange 2000 Server and Exchange Server 2003--In Exchange 2000 Server and Exchange Server 2003, the organization hierarchy includes organizations, administrative groups, servers, and storage groups. The organization is the highest level in the hierarchy and includes the entire enterprise. An administrative group is a set of servers that share an administrative security context. Each server in the administrative group can have up to four storage groups. Each storage group includes up to five database stores that can be mounted and dismounted independently. For more information on the Exchange 2000 Server and Exchange Server 2003 organization hierarchy, see your Microsoft Exchange Server documentation. Note: If you are using Exchange Server 2003 and want information on performing Volume Shadow Copy Service backups, see the Microsoft Volume Shadow Copy Service Guide. ■ Exchange Server 2007--In Exchange Server 2007, there are four organization models: - Simple Exchange organization - Standard Exchange organization - Large Exchange organization - Complex Exchange organization Note: For more information about Exchange Server 2007 organization models, see the Microsoft TechNet web site. Each Exchange mailbox server in the organization can have up to 50 storage groups. In a non-replicated environment, each storage group can have up to five database stores. In a replicated environment, each storage group can have one database. Each database can be mounted and dismounted independently. How Single Instance Storage Works Single Instance Storage is the method Exchange Server uses to process messages. This method stores only one copy of a message, links it to multiple recipients in the Information Store, and uses references to the message in each recipient's mailbox. Single Instance Storage applies to individual attachments and other message components. Chapter 1: Introducing the Agent 13