DISK backup job tuning

Products

• Disk Backup and Restore - MVS

Issue/Introduction

Running the following job to backup the ZFS files

 SCAN REALVOLS         
  SELECT VOLUME=(/),

   CRI=(ZFS,EQ,YES)   
   BACKUP RETPD=30   

the Elapsed Time and CPU time are very high .

How is it possible to improve both values ?

Environment

Release : 14.0

Resolution

There are 2 methods: 

by using the system symbol when the SCAN REALVOLS command is used: 

//DMS.SYSIN DD  *,SYMBOLS=EXECSYS         
SCAN REALVOLS                             
SET MODE=SIM                              
SELECT DSN=ABC.&SYSNAME..ZFS         
BACKUP        

OR 

by using the FIND command :

1) //SYSIND DD 

     FIND DSN=txxx./

     SELECT    CRI=(ZFS,EQ,YES)  

    BACKUP RETPD=30 

or 

2) //SYSIND DD 

     FIND TABLE=xxxx

     SELECT   CRI=(ZFS,EQ,YES)  

     BACKUP RETPD=30