RESTORE/RECOVER › Restore and Recover of VSAM Clusters › FILES Updates During RESTORE/RECOVER

FILES Updates During RESTORE/RECOVER

When a restore/recover occurs the files data set archive record for each data set is updated. This record is called the DSNINDEX record and is described in Subfile Record Format —(DSNINDEX) in the Systems Guide. Three fields are updated in the DSNINDEX record for each restore. The first two are the date and time of the restore. The third field is a count of the number of restores that have been done from that DSNINDEX record. The restore date is used for 3 functions:

• The MERGE function uses this date in determining if a data set should be merged onto a different ARCHVOL
• The IXMAINT function uses this date to determine if a DSNINDEX record should be removed from the FILES
• The RECOVER function uses this date in conjunction with its RESDT criteria parameter

The restore time and count are currently for informational purposes only.

If the update of the DSNINDEX records during RESTORE/RECOVER is not desired because your data is not SMS managed or to expedite the recovery of multiple volumes, such as in a disaster recovery situation, see the sysparm description for SMSUPDATy in the Systems Guide for options to limit this update process. Note that this sysparm also controls accessibility to the Recover restart capabilities.