Microsoft Exchange 2000 Operations — Version 1.0
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It is critical that the backup time for any database within a storage group does not conflict
with the maintenance times of any database within the same storage group. If it does, backup
will terminate the online defragmentation portion of the store online maintenance and the
database might never finish defragmenting.
Choosing the Correct Maintenance Strategy
The correct online maintenance strategy can be devised by examining the typical behavior
of the user community; by knowing how many users, databases, and servers are in the site;
and by coordinating this information with the online backup strategy.
On the next page is an example of an online store maintenance schedule for a corporate
Exchange 2000 mailbox server that hosts users who are in a single time zone.
First Storage Group
◆
Database One
Online maintenance runs between 9:00 P.M. and 1:00 A.M.
◆
Database Two
Online maintenance runs between 9:30 P.M. and 1:30 A.M.
◆
Database Three
Online maintenance runs between 10:00 P.M. and 2:00 A.M.
Online Backup begins at 2:00 A.M.—it backs up all databases in the first storage group
when all of them have finished online maintenance.
Second Storage Group
◆
Database Four
Online maintenance runs between 10:30 P.M. and 2:30 A.M.
◆
Database Five
Online maintenance runs between 11:00 P.M. and 3:00 A.M.
◆
Database Six
Online maintenance runs between 11:30 P.M. and 3:30 A.M.
Online Backup begins at 3:30 A.M and backs up all databases in the second storage
group when all databases have finished online maintenance. This configuration staggers
the Active Directory LDAP queries generated by online maintenance, which are performed
in the first minutes of the procedure, and ensures that online backup does not interfere
with online defragmentation.