Kbase 37336: How to plan the AI file extent size
| Autor |
Progress Software Corporation - Progress |
| Acesso |
Público |
| Publicação |
4/2/2001 |
|
Solution ID: P7336
GOAL:
How to plan the AI file extent size
GOAL:
How much disk space do I need for my AI extents
FIX:
To determine the amount of AI file space required, use the Promon utility BI Log Activity Display to monitor the number of BI writes that occur during the activity period that you want to use After-Imaging.
The information written to the BI almost matches the information written to the AI file, typically only 0.05 % fewer bytes are written to the AI file than the BI file.
A good formula is :
-Find the BI cluster size
-Find the number of checkpoints during a typical day using PROMON-Activity
-Multiply the BI cluster size by the number of checkpoints
-Multiply the previous result by the number of days between backups