HP B6960-96035 manual IDB size estimation, Specifics for large cells, On the Windows Cell Manager

Specifics for large cells

If the number of files grows into the tens of millions, or there are tens of thousands of files generated on a daily basis, and you use the Log All option, then backup speed and IDB growth will become a problem in a relatively short period of time. In this situation, you have the following options:

•Reduce the logging level to the smallest acceptable level. Setting the Log Files option can reduce the IDB size to a third, and setting the Log Directories option to almost a tenth. This, of course, depends on the nature of the file systems in the cell.

•Reduce the catalog protection to a minimum.

•Split the cell in two. As a final solution, you can always introduce another IDB and redirect half of the systems into it.

You can configure Report on System Dynamics, which informs you about dynamics of the growth of filenames on a particular client.

IDB size estimation

If you mainly perform filesystem backups, the IDB can grow to a significant size (larger than 16 GB) under certain conditions. If you perform disk image or online database, it is very likely that your IDB will not grow beyond 2 GB.

To estimate the size of the IDB use the Internal Database Capacity Planning Tool located at:

•On the UNIX Cell Managers:

/opt/omni/doc/C/IDB_capacity_planning.xls

•On the Windows Cell Manager:

Data_Protector_home\docs\IDB_capacity_planning.xls

You can also use this tool to estimate the size of the IDB in environments with online databases (Oracle, SAP R/3).

Concepts guide 203