HP B6960-96035 - Manual (Page 221)

Scheduled and interactive backup sessions
Scheduled backup session
A scheduled backup session is started by the Data Protector Scheduler at the time
you have specified. You can view the progress of the scheduled backup session in
the Data Protector monitor.
Interactive backup session
An interactive backup session is started from the Data Protector user interface directly.
The Data Protector monitor starts immediately and you can view the progress of the
backup session. Note that multiple users can monitor the same backup session. You
may want to stop monitoring by disconnecting the user interface from the session.
The session will then continue in the background.
Backup session data flow and processes
What happens in a backup session?
The information flow of a backup session is shown in Figure 63 on page 222. Note
that the data flow and processes described here are for a standard network backup.
For data flow and processes specific to other types of backup, such as direct backup,
see the related chapter.
When a backup session is started, the following happens:
1. The Backup Session Manager (BSM) process is started on the Cell Manager
system and controls the backup session. This process reads the backup
specification for information on what to back up, and which options, media,
and devices to use for the backup.
2. The BSM opens the IDB and writes to the IDB information about the backup
session, such as generated messages, details about the backed up data, and
the devices and media that were used for the session.
3. The BSM starts Media Agents (MAs) on the systems with devices configured for
backup. A new Media Agent is started for each drive used in parallel. The
number of Media Agents that can be started in the cell is limited by the cell
configuration and the number of licenses you have purchased.
In a backup session with object mirroring, the BSM also starts Media Agents
that will be used for mirroring.
Concepts guide 221