entire backup job and to prevent too many backup jobs from piling up on the same cartridge,
but small enough that you are not wasting overall cartridge space.
•
Additional nodes — For systems with long backup windows, you may want to include additional
nodes to speed up the post-processing deduplication. A VLS system using deduplication can
support up to four 1U or 2U high performance nodes.
•
Additional capacity — Because you must store two full backups before the delta-differencing
begins, you may want to include additional disk capacity at least the size of the sum of the
backups. A VLS system using deduplication can support up to eight arrays with four 1U or
2U nodes.
Installing the Deduplication Licenses
The deduplication feature is a licensed option. The number of deduplication licenses must match
or exceed the number of capacity licenses (based on LTU) on the VLS device. See
“Installing
Additional Licenses” (page 31)
for installation instructions.
After installing the required deduplication licenses, the VLS automatically reboots. When the system
is back up, it first checks the standard capacity licenses and then the deduplication licenses. Once
the deduplication licenses are verified, the deduplication feature is automatically enabled for all
supported backup types.
No further setup is required. When the next backup begins, the deduplication process begins
mapping the content of that backup. After the second backup, the system delta-differences
(compares) the two backups and the deduplication proceeds.
You may choose to disable some backup types; see
“Configuring Deduplication Options” (page 71)
for details.
Configuring Deduplication Options
You can include or exclude specific backups or types of backup (e.g., server type) from the
deduplication process and choose the deduplication algorithm used.
NOTE:
These options are not available until you have installed the appropriate number of
deduplication licenses.
1.
Select the
System
tab.
2.
Expand
Chassis
on the navigation tree.
3.
Expand
Deduplication
on the navigation tree.
4.
Select
Configuration
from the navigation tree.
The
Configuration
screen displays. See
Figure 9 (page 72)
.
Configuring Deduplication Options
71
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