So depending on the version of z/OS - look at On Demand Migration (v2.1 and above), this might help more
Second, correct, files are only moved if DFHSM feels the volume needs to have the space back, however, you could have a migration policy in the management class that says - if this is still on DASD after 1 month, then migrate the file. It depends on what your requirements are. You can just let files migrate as HSM sees fit based on its algorithms for space management, or you can setup a management class that says it gets migrated if unused in XX days. Many choices. Lizette > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] On > Behalf Of willie bunter > Sent: Thursday, January 14, 2016 10:23 AM > To: IBM-MAIN@LISTSERV.UA.EDU > Subject: DFHSM/SMS QUESTION - SPACE MANAGEMENT > > Good Day To All, > > I need to confirm if I my understanding about SMS & SPACE management is > correct. > We have noticed that there are several dsns which have been on dasd for over > 10 months. The volumes and dsns are all SMS managed and DFHSM performs the > necessary migration and deletion. I checked the MANAGEMENT class and the dsns > are to be deleted after 1 day non-usage > > Expire after Days Non-usage . : 1 > Expire after Date/Days . . . . : 1 > Retention Limit . . . . . . . : 0 > > Below are the attributes of the Storage Group: > > > Allocation/migration Threshold : High 85 (1-100) Low . . 1 > (0-99) > Alloc/Migr Threshold Track-Managed: High 85 (1-100) Low . . 1 (0- > 99) > Guaranteed Backup Frequency . . . . . . (1 to 9999 or > NOLIMIT) > BreakPointValue . . . . . . . . . . . . (0-65520 > or blank) > Processing Priority . . . . . . . . . . 50 (1-100) > > I think that the dsns are not deleted because SMS did not select some of these > volumes have not met the criteria of the Low threshold of 1. I remember > reading somewhere (on this board the following): > > For primary space management, HSM only looks at the low threshold. If the > volume exceeds the low threshold, then we will process any data sets that are > eligible for migration on that volume. > > Could someone confirm if I am correct? > > Thanks. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
