Datasheet

18 CHAPTER 1 INTRODUCING EXCHANGE SERVER 2010
Mailbox server on which a public folder replica is located. The RPC Client Access Service does
not handle connectivity for public folders.
Figure 1.8
A client using MAPI on
the middle tier
Tokyo
Mailbox
server
Active Directory
Load balanced
Client Access servers
Outlook MAPI
client
Database Availability Group
Denver
Mailbox
server
Marketing
(active copy)
Executives
(active copy)
Executives
(passive copy)
Marketing
(passive copy)
Accounting
(passive copy)
Content Storage Improvements
As we mentioned earlier, email systems have evolved not only in their complexity but also in
the complexity (and size!) of the messages and mailbox content being sent and stored. Users’
demands for improved searching and indexing of their mailboxes have stretched the limits of
most server hardware. The following list includes some of the improvements with respect to
data storage and recoverability:
◆ Support for recovering moved or deleted mailboxes using a recovery storage group
◆ Volume Shadow Copy restoration to recovery databases on alternate servers
◆ Lost log resilience that allows a database to be recovered even if the last few log files are
missing and a new underlying technology that allows for incremental resynchronization
Mailbox Databases
Even in a small or medium-sized organization, mailbox-size constraints are often based
solely on the ability to restore a certain amount of data given a specified maximum amount
of time. To scale to larger mailboxes, the administrator must create more mailbox stores.
While in Exchange Server 2003 Enterprise Edition administrators could create 20 mailbox
database spread across four storage groups, Exchange Server 2010 changes this paradigm by
not only removing storage groups but also by increasing the number of databases available.
The Exchange 2000/2003 term mailbox store has been replaced simply with the term mailbox
database.
To allow a server to scale to support larger mailbox sizes or more mailboxes, Exchange
Server 2010 Enterprise Edition allows up to 100 mailbox databases of up to 16 TB each.
Exchange Server 2010 Standard Edition supports a maximum of five databases of up to
16 TB each.