HP Data Protector Software Cell Manager Planning and Sizing

Using the Internal Database Capacity Planning Tool allows to calculate the estimated IDB growth by
making changes to the discussed parameters.
Figure 11 shows the IDB growth after changing the Logging level from “None” over “Dir” and “File”
and at last “All.”
Figure 11: IDB Growth
It becomes quite obvious that a careful selection of the datalist configuration parameters/details is
recommended to manage the database growth effectively. Please follow the recommendations given
in the “IDB key growth and performance parameters” paragraph.
Cell Manager requirements
On systems running HP-UX
The Cell Manager must meet the following minimum requirements:
• The Soft File Limit (maxfiles) per Process on the Cell Manager should be at least 1024.
• 256 MB of RAM (512 MB recommended)
For each parallel backup session, 40 MB of RAM are required and 5–8 MB per data segment size.
This means that, for example, if you want to run 60 parallel backup sessions 3 GB of RAM plus 512
MB for data segments are needed.
• 300–425 MB of disk space + approximately 2% of planned data to be backed up (for use by the
IDB).
• It is recommended to modify the kernel parameters as follows:
– set maxdsiz (Max Data Segment Size) or maxdsiz_64 (for 64-bit systems) to at least
134217728 bytes (128 MB).
– set semmnu (Number of Semaphore Undo Structures) to at least 256.
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