Implementing nTier Deduplication
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Monitor Deduplication
Data deduplication takes place after a virtual tape is unloaded from a tape drive and
moved to a slot. Deduplication options define when the process actually starts (refer
to
“Set deduplication options”
).
Before deduplication, the virtual tape’s backup data is stored on the disk(s) of the
nTier VTL appliance. When the deduplication process begins, an intelligent “Tape
Scanner” process analyzes the backup data and determines whether data is unique
or has already been copied to the SIR repository. The process then passes only
single instances of unique data to the SIR repository. Upon completion, the original
virtual tape is replaced with a “Virtual Index Tape” (VIT) which contains pointers to
the data on SIR storage instead of the actual data.
The VTL Console offers a variety of information about the performance of your
deduplication efforts. From the VTL Console, you can view the following:
•
Status of running jobs
•
Scanner history
•
Repository statistics
Status of running jobs
To view information for jobs that are currently running on a specific server, highlight
the nTier VTL appliance object and select the
Scanner processes
tab in the right
panel.
