Example

The vast majority of the 1000 jobs run daily by the same company of the previous example generates a single user SYSOUT data set, along with the usual system data sets. Thus, the maximum number of rows in the index is: 2 * 1000 = 2000. Allowing 50% for growth, the space required for the index is: 3000 * 77 = 231000 bytes. On a 3390 this is 231000 / 56664 = 4 tracks.