DFHSM conversion to Disk improvement

Products

• Disk Backup and Restore - MVS
• DISK BACKUP AND RESTORE- ADD-ON OPTIO
• DISK BACKUP AND RESTORE

Issue/Introduction

While running the conversion from DFHSM to Disk, this may take a lot of time to complete. Is there a way we can improve the performance?

Resolution

In the step SORT2 of HSMGEN1, select from the MCDS REPRO sequential file. The records longer than 280 are sorted by VOLSER. The output is written in a file 'xxxx..DISK.OUTPUT.SORTM'. This file will contain all the datasets which should be moved from DFHSM to DISK with the related tapes.

For example these records are 3000, in order to do parallel convert jobs, break this file xxxx..DISK.OUTPUT.SORTM down to 3 new files , each containing 1000 records. So create 3 files SORT1 SORT2 and SORT3 that will be the input of 3 parallel convert jobs which will be CONVERT1 CONVERT2 and CONVERT3. All are the copy of HSMGEN1 but divided in 3 jobs each using SORTn created previously.

In this way each job will manage separated data and if one of them would face any error, only this one will be hung up, not the whole conversion. Using that way will decrease the conversion delay in a very great way.