FDRINSTANT Examples

In order to demonstrate the simplicity of FDRINSTANT, this page contains a couple of examples using different hardware replication features.

Additional and more detailed technical information on how FDRINSTANT works with a particular hardware replication feature can be found in the Concepts & Facilities Guide, and also in Sections 25 to 29 of the FDRINSTANT manual.

Example 1: ABR Volume Backup (With EMC TimeFinder)

This example shows FDRINSTANT being used with EMC TimeFinder/Snap (or TimeFinder/Clone) to run an ABR Full-Volume backup.

Step 1 creates point-in-time images of the selected online volumes and marks the ABR Full backups as completed. A new ABR backup generation is created for each volume, and ABR then updates the corresponding online volume with information about that backup. This process is executed using the ABR statement SNAP, which drives EMCSNAP. It normally takes only a few seconds per volume. As soon as the process is complete for all selected volumes, updates to the online copies of those volumes can begin again.

Although only one TAPE DD is present, the SNAP will actually process up to 10 volumes concurrently, to reduce processing time. If this were a consistent backup (i.e. using TimeFinder/Consistency Group), the SNAP statement would be replaced by CONSNAP, and all of the resultant SNAPs would be done at the same/consistent point-in-time. For TimeFinder/Snap, SNAPUNIT specifies the address of a virtual disk. For TimeFinder/Clone, SNAPUNIT specifies the address of a real disk.

Step 2 then creates the actual ABR full volume backup by reading the offline point-in-time images, and writing the backups to tape just like a “conventional” ABR backup.

FDRINSTANT with TimeFinder/Clone (or TimeFinder/Snap)
ABR Full Volume Backup
Step 1: SNAP selected volumes to create point-in-time images
//STEP1      EXEC PGM=FDRABR,REGION=0M
//SYSPRINT    DD  SYSOUT=*
//SYSPRIN1    DD  SYSOUT=*
//SYSPRIN2    DD  SYSOUT=*
//TAPE1       DD  DUMMY
//SYSIN       DD  *

    SNAP     TYPE=FDR,DSNENO=USE,DATA=USED,ENQERR=NO,RTC=YES
    MOUNT    VOL=PAY001,SNAPUNIT=07C8
    MOUNT    VOL=PAY002,SNAPUNIT=07C9
    MOUNT    VOL=PAY003,SNAPUNIT=07CA
    
Step 2: ABR Full Volume backups from the offline images
//STEP2      EXEC PGM=FDRABR,REGION=0M
//SYSPRINT    DD  SYSOUT=*
//SYSPRIN1    DD  SYSOUT=*
//SYSPRIN2    DD  SYSOUT=*
//TAPE1       DD  DSN=FDRABR,LASTAPE,ABR1,UNIT=CART,DISP=(MOD,KEEP)
//TAPE2       DD  DSN=FDRABR,LASTAPE,ABR2,UNIT=CART,DISP=(MOD,KEEP)
//SYSIN       DD  *

    DUMP     TYPE=FDR,DSNENO=USE,DATA=USED,ENQERR=NO,SNAP=USE,RTC=YES
    MOUNT    VOL=PAY*

The JCL and control statements required for this process are fully described in section 25 of the FDRINSTANT manual. Similar examples for running FDRINSTANT-driven ABR backups on StorageTek, Hitachi and IBM DASD subsystems can be found in sections 26, 27 and 29 respectively.

Example 2: FDR Volume Backup (With IBM FlashCopy)

This example shows FDRINSTANT being used with IBM FlashCopy (FDRFLASH) to run an FDR volume backup, perhaps as an ad-hoc backup outside of the regular ABR Full/Incremental process.

• The FlashCopy target volume at address 01FA has been permanently assigned to online volume “PROD01”.
  
  
• The FCOPY step starts a FlashCopy session from online volume PROD01 to offline target 01FA.
  
  
• The VERIFYVOLSER=YES on the FDRCOPY statement will verify that 01FA already contains volser PROD01.
  
  
• The BACKUP step will backup the offline copy of volume PROD01. After the backup is complete, FDR will terminate the FlashCopy session.

//FCOPY      EXEC PGM=FDRFLASH
//SYSPRINT    DD  SYSOUT=*
//TAPE1       DD  DUMMY
//SYSIN       DD  *

    FCOPY TYPE=FDR,VERIFYVOLSER=YES
    MOUNT VOL=PROD01,FLASHUNIT=01FA

//BACKUP     EXEC PGM=FDR,REGION=0M,COND=(0,NE,FCOPY)
//SYSPRINT    DD  SYSOUT=*
//SYSUDUMP    DD  SYSOUT=*
//DISK1       DD  UNIT=SYSALLDA,VOL=SER=PROD01,DISP=OLD
//TAPE1       DD  DSN=BACKUP.VPROD01(+1),UNIT=TAPE,DISP=(,CATLG)
//SYSIN       DD  *

Note: The JCL and control statements required for this process are fully described in section 29 of the FDRINSTANT manual. Similar examples for running FDRINSTANT-driven FDR backups on EMC, StorageTek and Hitachi DASD subsystems can be found in sections 25, 26 and 27 respectively.

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