About deduplication capacity and usage reporting

Several factors may affect the expected usage results, as follows:

Expired backups may not change the available size and the used size. An expired backup may have no unique data segments. Therefore, the segments remain valid for other backups.
NetBackup Deduplication Manager clean-up may not have run yet. The Deduplication Manager performs clean up twice a day. Until it performs clean-up, deleted image fragments remain on disk.

If you use operating system tools to examine storage space usage, their results may not match the usage reported by NetBackup, as follows:

The operating system tools cannot report usage accurately. The storage implementation uses container files. Deleted segments can leave free space in container files, but the container file sizes do not change.
If other applications use the storage, NetBackup cannot report usage accurately. NetBackup requires exclusive use of the storage.

Table: Capacity and usage reporting describes the options for monitoring capacity and usage.

Table: Capacity and usage reporting

Option	Description
Change Storage Server dialog box	The Change Storage Server dialog box Properties tab displays storage capacity and usage. This dialog box displays the most current capacity usage that is available in the NetBackup Administration Console. See Changing deduplication storage server properties.
Disk Pools window	The Disk Pools window of the Administration Console displays a value that was stored when NetBackup polled the disk pools. NetBackup polls every 5 minutes; therefore, the value may not be as current as the value that is displayed in the Storage Server window. To display the window, expand Media and Device Management > Devices > Disk Pools.
Disk Pool Status report	The Disk Pool Status report displays the state of the disk pool and usage information.
Disk Logs report	The Disk Logs report displays event and message information. A useful event for monitoring capacity is event 1044; the following is the description of the even in theDisk Logs report: The usage of one or more system resources has exceeded a warning level. The threshold for this message is at 90% capacity. No more data can be stored.
License Keys dialog box	The summary of active capacity-based license features in the NetBackup License Keys dialog box. The summary displays the storage capacity for which you are licensed and the capacity used. It does not display the amount of physical storage space. On the Help menu in the NetBackup Administration Console, select License Keys.
View container command	A command that is installed with NetBackup provides a view of storage capacity and usage within the deduplication container files. See About deduplication container files. See Viewing capacity within deduplication container files.
The nbdevquery command	The nbdevquery command shows the state of the disk volume and its properties and attributes. It also shows capacity, usage, and percent used. See Determining the deduplication disk volume state.
NetBackup OpsCenter	The NetBackup OpsCenter also provides information about storage capacity and usage. See the NetBackup OpsCenter Administrator's Guide.