HP B6960-90078 User Manual
Page 419
Managing the Data Protector Internal Database
Configuring the IDB
Chapter 9
389
• You need to estimate future IDB size (disk space necessary for future
IDB needs). Refer to the HP OpenView Storage Data Protector
Concepts Guide for the IDB size estimation.
How Much Disk
Space Is Needed?
The disk space needed to accommodate the IDB varies significantly as a
function of many configuration aspects and policies used in defining and
operating backups.
The following simplified scenario of an environment requires about 900
MB of disk space for the IDB after 3 months, with very little growth
afterwards:
• 100 systems to be backed up (10,000 files each; without mail-servers)
• 350 GB total data volume
• filesystem backups with typical dynamics of 3% of new files per
month
• one full backup and four incremental backups per week
• logging level set to Log all (to allow convenient browsing of filenames
before restore). This is the most demanding logging option.
• catalog protection setting of three months for the full backups and
two weeks for the incremental backups.
Note that large configurations or long catalog protection periods in the
IDB can require more than 20 GB for the IDB.
A detailed estimation can be performed using the IDB Capacity Planning
Tool located on the Cell Manager:
• On UNIX:
/opt/omni/doc/C/IDB_capacity_planning.xls
• On Windows:
What to Plan for in
Advance
Typically the IDB grows rapidly in the beginning, until the catalog
retention periods have been reached. After that, the growth of the IDB is
mainly determined by the dynamics of systems that have a large
percentage of new files per month and the growth of the environment
itself (new systems to be backed up).
It is important to understand the various IDB growth functions: