BMSETDSG control statement

Specifies the threshold value that is used to set the bitmap block of an HDAM, an HIDAM, a PHDAM, or a PHIDAM database. The value can be specified for each data set group (DSG).

This control statement is optional. If you do not specify this control statement, BMSETDSG=* is used.


                   .-,---------.        
                   V .-*-----. |        
>>-BMSETDSG=--+-(----+-value-+-+--)-+--------------------------><
              | .-*-----.           |   
              '-+-value-+-----------'

*: Specifies to use the length of the longest segment in the data set group in the same manner as IMS™.
value: Specifies to use a threshold value from 3 to 32,000 for the data set group.

You can specify one parameter or a list of parameters. If one parameter is specified, it will be used for the first data set group of the database. Otherwise, parameters must be separated by commas and enclosed in parentheses. The Nth parameter will be used for the Nth data set group. You can specify up to 10 parameters. If the number of values specified is less than the number of data set groups, '*' will be used for other data set groups for which values are not specified.

Example 1: BMSETDSG=1000
The threshold value for the first DSG of the database is 1000.
Example 2: BMSETDSG=(1000,*,1200)
The threshold value for the first DSG is 1000 and the value for the third DSG is 1200. For other DSGs, the length of the longest segment in the data set group will be used.