Example of automatically backing up the same set of SMS volumes twice a day with two different hosts

This example uses automatic backup in a multiple DFSMShsm-host environment to back up the same set of SMS volumes twice a day with two different hosts. The example shows how each of the two hosts, by using a host-specific automatic backup window and by adjusting the minimum processing interval, can back up the SMS volumes more often than the normal minimum 14-hour processing interval.

Host 1

        AUTOBACKUPSTART(0400 0415 0800) /* Automatic backup will begin */
                                        /* at 4:00 a.m. with a latest  */
                                        /* start time of 4:15 a.m. and */
                                        /* end at 8:00 a.m.            */
 
        PATCH .MCVT.+418 X'00006270'    /* Adjust the minimum time for */
                                        /* automatic backup from 14    */
                                        /* hours to 7 hours.           */

Because host 2 finishes backup at 8 p.m. and host 1 begins backup at 4 a.m., approximately eight hours elapse between backups. Therefore, host 1 needs to use a patch to shorten the 14-hour minimum processing interval to less than eight hours.

Host 2

        AUTOBACKUPSTART(1600 1615 2000) /* Automatic backup will begin */
                                        /* at 4:00 p.m. with a latest  */
                                        /* start time of 4:15 p.m. and */
                                        /* end at 8:00 p.m.            */
 
        PATCH .MCVT.+418 X'00006270'    /* Adjust the minimum time for */
                                        /* automatic backup from 14    */
                                        /* hours to 7 hours            */

Note: The hex value used to specify the minimum processing interval is expressed in seconds:

X'00006270' = 25,200 seconds = 7 hours

Because host 1 finishes backup at 8 a.m. and host 2 begins backup at 4 p.m., approximately eight hours elapse between backups. Therefore, host 2 needs to use a patch to shorten the 14-hour minimum processing interval to less than eight hours.