Unloading the Security Information › Estimate Storage Requirements

Estimate Storage Requirements

The following explains how to estimate the amount of space (in cylinders) to allocate the UNLOAD utility data set.

To estimate the necessary amount of space

1. Estimate the number of records in your site’s CA Top Secret security file for ACIDS, owned resources, and user-defined fields.
2. Multiply the total count of each of these records by the multiplication factor provided in the following worksheet to calculate the total space (in bytes) required for each type of record.
3. Divide the total number of bytes needed for each of these types by the number of bytes on a cylinder for the hardware disk model you are using.

   You have calculated the total number of cylinders of space to allocate for each type of record.

   Note: IBM disk model 3390 has 849,960 bytes per cylinder, which is the number provided in the following worksheet.

4. Add the number of cylinders of space needed for each type of record

   You have calculated the total space (in cylinders) to allocate for the UNLOAD data set.

Note: The space allocation calculated may be more than your site actually requires. The multiplication factors provided in the following worksheet are based on maximum record lengths for target tables in the UNLOAD data set. After you run the unload utility one time, you will know exactly how much space was used in the UNLOAD data set, and can then release any unused space in the UNLOAD data set or reallocate the UNLOAD data set with the desired space allocation and rerun the unload utility.