HP Serveur lame HP ProLiant BL465c Gen8 - Manual (Page 66)

Figure 33 Configuration in which an active mailbox database copy and a passive mailbox database
copy are backed up and restored by different backup servers
Primary volume 1 is the active mailbox database copy, and primary volume 2 is the passive mailbox
database copy. Secondary volume 1 is managed by backup server 1, and secondary volume 2 is
managed by backup server 2. The data synchronization between the active side and the passive side
is accomplished via log shipping. Data is backed up on both the active side and the passive side,
and the data on each secondary volume is stored on a tape device.
If an error occurs on the active side, the passive side takes over the execution of services and also
performs backup and restore operations. If a logical error occurs on the passive side while the passive
side is executing the active side's services, the data is restored from the tape device to secondary
volume 2, and then from secondary volume 2 to primary volume 2. After the active side recovers from
the error, seed processing is performed from the primary volume 2, so that the data that was updated
while the passive side was executing the services is applied to primary volume 1.
If an error occurs on the passive side, seed processing is performed from the active side, so that the
data on the passive side is restored.
If logical errors, such as those caused by viruses, occur on both the active side and the passive side,
the data is restored from the tape device to secondary volume 1, and then from secondary volume 1
to primary volume 1. The restored data is then applied to primary volume 2 via seed processing.
Application Agent system configurations 66