SDSP backup and recovery

You should back up your SDSP data sets daily, such as at the end of automatic space management. The frequent backup is desirable because of the large number of user data sets whose data is stored in an SDSP data set. An SDSP data set is an active data set and is dynamically changing. The more frequently you back it up, the more current it will be if it must be recovered.

Example: If there are 50␠000 data sets in an SDSP data set and it is lost, DFSMShsm has to do 50␠000 data set recovers. If you have backed up the SDSP, you can recover the SDSP from your latest backup and then recover only a few user data sets that have migrated to it since your latest backup of the SDSP.

DFSMShsm does not automatically back up an SDSP data set as a single entity, but it can back up the individual data sets that the SDSP data set contains. However, you can use DFSMShsm commands to back up and recover an SDSP data set. To back up an SDSP data set, issue the BACKDS command and include only the data set name of the SDSP.

To recover an SDSP that has been backed up by DFSMShsm, do the following:

1. Issue a DELVOL MIGRATION command for the ML1 volume on which the SDSP resides. DFSMShsm’s recovery function does not recover backup versions to migration volumes, so the ML1 volume must be temporarily removed from DFSMShsm’s inventory of migration volumes.
2. Issue a RECOVER command for the SDSP data set.
3. Issue an ADDVOL command for the ML1 volume after the RECOVER command has been processed successfully. This adds the volume back to DFSMShsm’s inventory of migration volumes.