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About deduplication container files
Thededuplication storageimplementation allocatescontainer filesto holdbackup
data. Deleted segments can leave free space in containers files, but the container
file sizes do not change. Segments are deleted from containers when backup
images expire and the NetBackup Deduplication Manager performs clean-up.
Viewing capacity within deduplication container files
A command reports on storage usage within containers, as follows:
■ On UNIX and Linux systems, the path name of the command is
/usr/openv/pdde/pdcr/bin/crcontrol.
■ On Windows systems, the path name of the command is
install_path\Veritas\pdde\Crcontrol.exe.
The following is an example of the command usage on a Windows deduplication
storage server. The command shows the data store statistics (--dsstat option).
C:\Program Files\Veritas\pdde>Crcontrol.exe --dsstat 1
************ Data Store statistics ************
Data storage Size Used Avail Use%
68.4G 46.4G 22.0G 68%
Number of containers : 67
Average container size : 187441541 bytes (178.76MB)
Space allocated for containers : 12558583274 bytes (11.70GB)
Space used within containers : 12551984871 bytes (11.69GB)
Space available within containers: 6598403 bytes (6.29MB)
Space needs compaction : 508432 bytes (0.48MB)
Records marked for compaction : 3
Active records : 95755
Total records : 95758
TheNetBackupDeduplication Managerperiodically compactsthespace available
inside the container files. Therefore, space within a container is not available as
soon asit is free.. Various internal parameters control whether a containerfile is
compacted. Although space may be available within a container file, the file may
not be eligible for compaction. The NetBackup Deduplication Manager checks for
space every 20 seconds.
For help with the command options, enter crcontrol --help.
89Managing deduplication
Monitoring deduplication storage capacity and usage