IBM Support

Time Required to Run Reclaim Storage

Troubleshooting


Problem

Can I determine in advance how long a reclaim storage (RCLSTG) will take to run on my system?

Resolving The Problem

Can I determine in advance how long a reclaim storage (RCLSTG) will take to run on my system?

The runtime for a RCLSTG is so variable that there is no standard formula to determine exactly how long it will take. However, there is a data area that can be displayed to see how long the last RCLSTG took to run (providing a RCLSTG was previously run on the system).

Note: At R540 and later, the RCLSTG ESTIMATE(*YES) option can be run to assist with determining an estimate of how long the RCLSTG command takes to complete.

On the operating system command line, type the following:

DSPDTAARA DTAARA(QRCLSTG)

Press the Enter key.

Prior to R610, you will see a display that looks similar to this:

                             Display Data Area

                                                             System: LKZ
 
 Data area . . . . . . . :   QRCLSTG

   Library . . . . . . . :     QUSRSYS

 Type  . . . . . . . . . :   *CHAR

 Length  . . . . . . . . :   200

 Text  . . . . . . . . . :   Information from RCLSTG


            Value

 Offset      *...+....1....+....2....+....3....+....4....+....5

     0      '1010609   143407                                  '

    50      '1010609   152249                                  '

   100      'V5R4M0    LKZ       10xxxxx                       '

   150      '                                                  '


Offset 0Contains information about the start time of the RCLSTG. (CYYMMDD date and time)
Offset 50Contains information about the end time of the RCLSTG. (CYYMMDD date and time)
Offset 100Contains system information. (release level, system name, and serial number)
run time =(end time) - (start time)


At R610 and beyond:
On the operating system command line, type the following:

DSPDTAARA DTAARA(QRCLSTG)

Press the Enter key.

You will see a display that looks similar to this:

                               Display Data Area                                
                                                             System:   LKN
 Data area . . . . . . . :   QRCLSTG                                            
   Library . . . . . . . :     QUSRSYS                                          
 Type  . . . . . . . . . :   *CHAR                                              
 Length  . . . . . . . . :   1000                                              
 Text  . . . . . . . . . :   Information from RCLSTG                            
                                                                               
            Value                                                              
 Offset      *...+....1....+....2....+....3....+....4....+....5                
     0      '1080529 132200                                    '                
    50      '1080529 133141                                    '                
   100      'V6R1M0    LKN    10xxxxx                          '                
   150      'R0001046575000716                                 '                
   200      'F0000124170000009                                 '                
   250      'D0000078693000008                                 '                
   300      'O0000967882000006                                 '                
   350      '                                                  '                
   400      '                                                  '                
                                                                        More...

 Press Enter to continue.                                                      
                                                                               
 F3=Exit   F12=Cancel  
Offset 0Contains information about the start time of the RCLSTG. (CYYMMDD date and time)
Offset 50Contains information about the end time of the RCLSTG. (CYYMMDD date and time)
Offset 100Contains system information. (release level, system name, and serial number)
Offset 150Estimated time for reading objects from disk (R, followed by the next 10 numbers are the number of objects, followed by the hour, minute, second).
Offset 200Estimated time for file ID table recovery (F, followed by the next 10 numbers are the number of objects, followed by the hour, minute, second).
Offset 250Estimated time for directory recovery (D, followed by the next 10 numbers are the number of objects, followed by the hour, minute, second).
Offset 300Estimated time for object description verification (O, followed by the next 10 numbers are the number of objects, followed by the hour, minute, second).


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Historical Number

29221939

Document Information

Modified date:
18 December 2019

UID

nas8N1016711

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