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Estimate Storage Requirements for the Unload Data Set (CA ACF2)

If you are using CA ACF2, estimate the amount of space (in cylinders) that is required to allocate the Unload utility data set. See the CA ACF2 Worksheet.

Follow these steps:

  1. Estimate the number of records in your site's CA ACF2 security databases for the following:

    Important! If you are adding user-defined fields to the UNLOAD file, multiply the total count of user-defined fields represented by the CIA Unload Utility SYSIN file USERFIELD input control statements by the total number of number of logonids. For example, if there are 10 users, and 10 user-defined fields in the ACFFDR, the total count would be 100. The number of user records generated by adding user-defined fields significantly increases the size of the UNLOAD file that needs to be allocated.

  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. This way you determine the total number of cylinders of space to allocate for each type.

    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 to calculate the total space (in cylinders) to allocate for the UNLOAD data set.

    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 know exactly how much space was used in the UNLOAD data set. 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.