Editing The Data Protector Configuration; Configuring Deduplication Options - HP StorageWorks 12000 - Virtual Library System EVA Gateway User Manual

4. Select Configuration from the navigation pane.
The Configuration screen displays. See
Figure 24 Configuring deduplication options
.
5. Select the data types to change.
6. Select the new policy state or deduplication algorithm from the appropriate list.
By default, deduplication is enabled for all data types that support it.
By default, file servers will back up using a file-level differencing algorithm. Because in some
cases this algorithm may be less space efficient (e.g., if the file server is full of very small files),
there is a backup-level algorithm. Note that database data defaults to the backup-level differencing
algorithm.
7. Select GO next to the pull-down field you changed.
The screen refreshes and updates the information.
8. Select Enable/Disable Enhanced Data Integrity Check in the task bar to toggle this option.
The integrity check runs a second pass verification over the data after deduplication to ensure
that the deduplicated tape matches the original version it will replace. This is disabled by default
because of its significant impact on performance.
NOTE:
You can set the state and backup algorithm at the individual backup job level. On the Configuration
screen, select a specific data type to display all the backup jobs of that type, then follow steps 6 and
7 above.

Editing the Data Protector Configuration

Data Protector adds one suffix to the backup job names of full backups and a different suffix to the
backup job names of incremental backups. Because the job names are not identical, full backups will
not deduplicate against incremental backups. However, you can set up deduplication to strip off the
suffixes so the two types of jobs will deduplicate.
From Command View VLS:
1. Select the System tab.
2. In the navigation pane, select Chassis. The chassis details screen opens
94 Deduplication
Figure 24.