HP B6960-96035 Detail Catalog Binary Files Dcbf, Size and growth for CDB objects and positions

when one of these files starts running out of space, so that you can add new files to extend the size of the filenames part of the IDB.

Size and growth for CDB (objects and positions)

The CDB records other than filenames occupy a minor share of space in the IDB. Space consumption is in the range of 100 MB for a medium size backup environment. For more details, see “IDB size estimation ” on page 203.

CDB location

The CDB is located in the following directory:

•On Windows Server 2008:

Data_Protector_program_data\db40\datafiles\cdb

•On other Windows systems: Data_Protector_home\db40\datafiles\cdb

•On UNIX systems: /var/opt/omni/server/db40/datafiles/cdb

Detail Catalog Binary Files (DCBF)

DCBF information

The Detail Catalog Binary Files part stores file version information. This is information about backed up files, such as file size, modification time, attributes/protection, and so on.

One DC (Detail Catalog) binary file is created for each Data Protector medium used for backup. When the medium is overwritten, the old binary file is removed and a new one is created.

DCBF size and growth

In an environment where filesystem backups using the Log all option are typical, the DCBF occupies the largest part (typically 80%) of the IDB. To calculate the size of DCBF, use the following formula: dcbf_file_in_bytes is approximately num_of_files_on_tape x 30_bytes . Logging level and catalog protection can be used to specify what is actually stored in the IDB and for how long. See “IDB growth and performance: key tunable parameters” on page 198.

By default, one DC directory, db40\dcbf, is configured. Its default maximum size is 16 GB. You can create more DC directories and have them on different disks on the Cell Manager, thus extending IDB size. The maximum number of supported directories per cell is 50.

192 The Data Protector internal database