Getting Started
Implementing nTier Deduplication
19
Set deduplication options
Data deduplication takes place after a tape is unloaded from a tape drive and
moved to a slot. By default, Deduplication is enabled and deduplication starts
one minute after the tape is unloaded. For your convenience, you can set
options that control when deduplication starts, as well as how much data must
have been written to a tape before it is deduplicated. You can also disable
deduplication.
1. Right-click the
VirtualTape Library System
object and select Properties. A screen
displays showing options you can set.
2. Choose on of the
start
options:
•
Delay start
imposes a delay before deduplication begins. This option is
preselected and set to 1 minute. Setting this value to 0 imposes a delay of
30 seconds.
•
Start deduplication at
lets you avoid an overlap between backup jobs and
deduplication.
3.
Minimum amount of data written
prevents deduplication unless at least this
amount of data has been written to a tape. The default is 1 MB; you cannot
specify a lower value.
4. Click
OK
when you are done.
Note:
During system maintenance or if advised by technical support, disable
deduplication by unchecking
Enable deduplication
. Otherwise, do no disable this
feature.
