HP 9000 Virtual Library System - Manual (Page 89)

Delta-diff in Process — the backup has identified another version of itself to difference against
and is now running differencing to identify the duplicate data between the two versions. With
multi-stream backups, this process may take multiple tries (going back to "Waiting for Next Backup"
state each time) until the differencing locates the correct stream.
Pending Reclamation — the differencing is complete (duplicate data has been identified) and
space reclamation is now waiting for full cartridges before it can begin.
Partially Reclaimed — in a backup job that spanned multiple cartridges, the full cartridges
have been space reclaimed but the last tape in the spanned set (which is partially full) is waiting
until that tape is full before it can reclaim space.
Dedupe Complete — deduplication, including all space reclamation, is complete for this backup
job.
No Match Found — indicates backups that cannot be deduplicated because they were unable
to match with their previous version due to large-scale modification.
In the detailed Backup and Cartridge reports, the Dedupe Ratio Estimate represents the overall
compression ratio (including both deduplication and compression) of that backup/cartridge based
on the amount of logical backup data stored versus the amount of physical disk space used. If the
backup job status is “Waiting for next backup,” “Delta-diff in Progress,” or “Pending Reclamation,”
the ratio will only include the compression because deduplication will not have actually space
reclaimed that tape and therefore will not have saved any disk space. If the status is “Partially
Reclaimed” or “Dedupe Complete,” the backup disk space has been partially or full reduced by
deduplication and the ratio represents compression plus deduplication. The Dedupe Estimate in
GB follows the same logic.
Deduplication Cartridge Report (version 3.4.x)
The cartridge report provides information on the deduplication of your backup jobs at the cartridge
level.
1.
Select Cartridge Report from the navigation tree or from the task bar of the Deduplication
Summary screen.
The cartridge report options display.
2. Select View corresponding to the report you want to view. You can view all cartridges, or
view a specific barcode prefix or virtual library.
The screen displays the list of cartridges meeting the set criteria.
3. From the results list, select a cartridge to see all of the backup jobs on that cartridge.
The report includes the following information:
•
Library
•
Barcode
•
Logical Size — the size of the backup data sent to the VLS (before deduplication and
compression)
•
Physical Size — the disk space currently used to store the compressed backup, which
varies over time as deduplication processes the backup and reclaims redundant disk
space
•
Dedupe Ratio Estimate — the estimated deduplication ratio (based on the Logical Size
divided by Physical Size)
Viewing Deduplication Statistics and Reports 89