Example 4 — Unloading while allowing read write access to the table space


This example unloads a sample of rows from example tables while giving users read/write access to the table space.

By specifying SHRLEVEL CHANGE CONSISTENT YES, UNLOAD PLUS briefly restricts access to the object only while externalizing the pages of the table space. When operating on partitioned objects (as in this example), UNLOAD PLUS restricts access to only the participating objects.

Message 50041I indicates the status of zIIP processing. For this example, an SUF also known as XBM subsystem ID was specified for SHRLEVEL CHANGE processing. UNLOAD PLUS uses the same SUF also known as XBM XBM subsystem ID for zIIP processing.

The following table describes key command options that this job uses:

Command options used in JCL

Description

LIMIT 10

Unloads up to 10 records

INTERVAL 2

Unloads every other row

SHRLEVEL CHANGE CONSISTENT YES

Invokes SUF (also known as XBM) to allow concurrent read and write access during the unload

XBMID XBMDB2

Identifies the SUF (also known as XBM) subsystem for using SUF (also known as XBM) with UNLOAD PLUS

SELECT

Names columns to unload

FROM

Names the table to unload

WHERE

Qualifies the data to unload

The following figure shows the JCL for example 4:

//    JOBCARD
//********************** ADUEX04 ************************************
//*******************************************************************
//****** Unloading while allowing READ/WRITE access to tablespace ***
//*******************************************************************
//*  Replace "DB2SYS" by your DB2 subsystem name.                     *
//*  Use your DB2 product install libraries for STEPLIBS :            *
//*     PRODUCT.LIBRARIES                                             *
//*     DB2.DSNEXIT                                                   *
//*     DB2.DSNLOAD                                                   *
//*********************************************************************
//UNLOAD04 EXEC PGM=ADUUMAIN,REGION=0M,
//         PARM=(DB2SYS,'ADUEX04','NEW ',,'MSGLEVEL(1)')
//*********************************************************************
//STEPLIB  DD DISP=SHR,DSN=PRODUCT.LIBRARIES
//         DD DSN=DB2.DSNEXIT,DISP=SHR
//         DD DSN=DB2.DSNLOAD,DISP=SHR
//SYSIN    DD *
*
 UNLOAD LIMIT 10  INTERVAL 2
        SHRLEVEL CHANGE CONSISTENT YES XBMID XBMDB2
*
      SELECT EMPL_LNAME, HIRE_DATE, DEPT_NO, SALARY_CODE
           FROM BMC.EMPLS
             WHERE SALARY_CODE ='H'
*
      SELECT EMPL_LNAME,EMPL_HIRE_DATE,EMPL_DEPT_NO,EMPL_SALARY_CODE
           FROM BMC.RET_EMPLS
             WHERE EMPL_SALARY_CODE ='S'
*
//SYSREC01 DD DSN=ADU.EXAMPL04.SYSREC01,
//            DISP=(,CATLG),SPACE=(TRK,(1,1)),UNIT=SYSDA
//SYSREC02 DD DSN=ADU.EXAMPL04.SYSREC02,
//            DISP=(,CATLG),SPACE=(TRK,(1,1)),UNIT=SYSDA
//SYSPRINT DD DSN=ADU.EXAMPL04.SYSPRINT,
//            DISP=(,CATLG),SPACE=(TRK,(1,1)),UNIT=SYSDA

SYSPRINT for example 4

The following figure shows the SYSPRINT for example 4:

1                               *****  B M C   U N L O A D   P L U S   F O R   D B 2    V13R1.00 *****
                                             (C) COPYRIGHT 1991 - 2022 BMC SOFTWARE, INC.
-BMC50001I UTILITY EXECUTION STARTING    2/15/2022    3:13:46 ...
 BMC50002I UTILITY ID = 'ADUEX04'.  DB2 SUBSYSTEM ID = 'DEMO'.  OPTION MODULE = 'ADU$OPTS'.
 BMC50471I z/OS 2.4.0,PID=HBB77C0,DFSMS FOR Z/OS=2.4.0,DB2=13.1.501
 BMC50471I REGION=0M,BELOW 16M=8.5M,ABOVE 16M=1,006.6M,IEFUSI=NO,CPUs=7,GPs=5,zIIPs=2
 BMC50471I MEMLIMIT=15.9E,AVAILABLE=15.9E,MEMLIMIT SET BY:REGION=0
 BMC50471I SMFID=DB2B,JOBID=J0940231,JOB=ADUEX04,STEP=UNLOAD04,CPU=8561-615 (z15)/1.71,72.0G
0
 BMC50471I UNLOAD PLUS FOR DB2--V13.01.00 BASE
 BMC50471I   NO MAINTENANCE TO REPORT
 BMC50471I DB2 UTILITIES COMMON CODE--V13.01.00 BASE
 BMC50471I   NO MAINTENANCE TO REPORT
 BMC50471I SOLUTION COMMON CODE--V13.01.00 BASE
 BMC50471I   MAINT: BPJ1541  BPJ1713  BPJ2211
 BMC50471I BMCSORT ENGINE--V02.04.01
 BMC50471I   MAINT: BPJ0691  BPJ0718  BPJ0881  BPJ0922  BPJ0996  BPJ1164  BPJ1309  BPJ1386  BPJ1497  BPJ1594  BPJ1724  BPJ1809
 BMC50471I          BPJ1833  BPJ1891  BPJ1905  BPJ2109  BPJ2232  BPJ2297
 BMC50471I BMC STATS API--V13.01.00 BASE
 BMC50471I   NO MAINTENANCE TO REPORT
 BMC50471I EXTENDED BUFFER MANAGER--V06.02.01
 BMC50471I   MAINT: BPE0443  BPE0445  BPE0447  BPE0449  BPE0450  BPE0451  BPE0452  BPE0455  BPE0456  BPE0457  BPE0460  BPE0463
 BMC50471I          BPE0467  BPE0468  BPE0469  BPE0473  BPE0474  BPE0475  BPE0479  BPE0480  BPE0482  BPE0487  BPE0488  BPE0489
 BMC50471I          BPE0493  BPE0497  BPE0498  BPE0501  BPE0503  BPE0507  BPE0512  BPE0513  BPE0517  BPE0518  BPE0519  BPE0523
 BMC50471I          BPE0524  BPE0527  BPE0528  BPE0530  BPE0531  BPE0534  BPE0535  BPE0540  BPE0541  BPE0542  BPE0545  BPE0549
 BMC50471I          BPE0551  BPE0552  BPE0555  BPE0557  BPE0560
0
 BMC50471I ANALYZE=(DB2STATS,NOLIMIT)              FORCE_RPT=NO                            SMAX=16
 BMC50471I CENTURY=(1950,2049)                     FORCE=NONE                              SMCORE=(0K,0K)
 BMC50471I CHANGE_CONSISTENT=NO                    HISTORY=YES                             SORTNUM=32
 BMC50471I CHANGE_QUIESCE=NO                       IBUFFS=25                               SQLDELAY=3
 BMC50471I CMAX=16                                 INLINE=NO                               SQLRETRY=100
 BMC50471I CMRATIO=50                              LOADDECP=NO                             SSREPORT=REPORT_SWITCH
 BMC50471I CONSTRULES=BMC                          LOCKROW=YES                             TAPEDISP=DELETE
 BMC50471I CURRENTDEGREE=NONE                      MAXP=5                                  TASKMAX=200%
 BMC50471I DELFILES=YES                            MSGLEVEL=1                              UBUFFS=25
 BMC50471I DRNDELAY=1                              NULLCHAR=X'6F'                          UNLDMAX=200%
 BMC50471I DRNRETRY=255                            NULLTYPE=T1                             UNLOADDN_ACTIVE=(YES,NO)
 BMC50471I DRNWAIT=NONE                            OPNDB2ID=YES                            UNLOADDN=(SYSREC,SYSRED)
 BMC50471I DSPLOCKS=DRNFAIL                        PLAN=ADU1310T                           USELRECL=NO
 BMC50471I EXCLDUMP=(X37,X22,X06)                  RECFM=AUTO                              UXSTATE=SUP
 BMC50471I FILEREFDN=SYSREF                        ROWSETSZ=100                            WORKUNIT=SYSALLDA
 BMC50471I FILL=NO                                 SDUMP=YES                               ZIIP=ENABLED
 BMC50471I FORCE_AT=(START,3)                      SHRLEVEL=REFERENCE                      ZONEDDECOVP=(C,D)
0
0
 BMC50471I TAPES=NONE
0
 BMC50470I OUTPUT   = SYSREC                             SYSRED                               SYSREF
 BMC50470I UNIT     = SYSALLDA                           SYSALLDA                             SYSALLDA
 BMC50470I VOLCNT   = 25                                 25                                   25
 BMC50470I GDGLIMIT = 5                                  5                                    5
 BMC50470I GDGEMPTY = NO                                 NO                                   NO
 BMC50470I GDGSCRAT = NO                                 NO                                   NO
 BMC50470I STORCLAS = NONE                               NONE                                 NONE
 BMC50470I DATACLAS = NONE                               NONE                                 NONE
 BMC50470I MGMTCLAS = NONE                               NONE                                 NONE
 BMC50470I UNITCNT  = 0                                  0                                    0
 BMC50470I SPACE    = CYL                                CYL                                  CYL
 BMC50470I PCTPRIM  = AUTO                               AUTO                                 AUTO
 BMC50470I MAXPRIM  = 0                                  0                                    0
 BMC50470I MAXSECD  = 0                                  0                                    0
 BMC50470I FILESZPCT  100                                100                                  100
 BMC50470I NBRSECD  = AUTO                               AUTO                                 AUTO
 BMC50470I DISKRETN = NONE                               NONE                                 NONE
 BMC50470I DISKEXPD = NONE                               NONE                                 NONE
 BMC50470I RETPD    = NONE                               NONE                                 NONE
 BMC50470I EXPDT    = 99000                              99000                                99000
 BMC50470I TRTCH    = NONE                               NONE                                 NONE
 BMC50470I DSNTYPE  = NONE                               NONE                                 LIBRARY
 BMC50483I SYSREC     VOLUMES=NONE
 BMC50483I SYSRED     VOLUMES=NONE
 BMC50483I SYSREF     VOLUMES=NONE
0
 BMC50483I SYSREC     DSNAME=&USERID.&TYPE.S&SELNUM
 BMC50483I SYSRED     DSNAME=&USERID.&TYPE.S&SELNUM
 BMC50483I SYSREF     DSNAME=&USERID.&TYPE.S&SELNUM
0

 BMC50471I DB2 DSNHDECP MODULE SETTINGS:
 BMC50471I VERSION                 = 1310
 BMC50471I SUBSYSTEM DEFAULT       = DEMO
 BMC50471I CHARACTER SET           = ALPHANUM
 BMC50471I DATE FORMAT             = USA
 BMC50471I TIME FORMAT             = USA
 BMC50471I LOCAL DATE LENGTH       = 0
 BMC50471I LOCAL TIME LENGTH       = 0
 BMC50471I DECIMAL POINT           = PERIOD
 BMC50471I DECIMAL ARITHMETIC      = 15
 BMC50471I DELIMITER               = DEFAULT
 BMC50471I SQL DELIMITER           = DEFAULT
 BMC50471I ENCODING SCHEME         = EBCDIC
 BMC50471I APPL. ENCODING SCHEME   = EBCDIC
 BMC50471I MIXED                   = NO
 BMC50471I EBCDIC CCSID            = (37,65534,65534)
 BMC50471I ASCII CCSID             = (819,65534,65534)
 BMC50471I UNICODE CCSID           = (367,1208,1200)
 BMC50471I IMPLICIT TIME ZONE      = CURRENT (-06:00)


 BMC50658I DB2 CURRENT FUNCTION LEVEL IS V13R1M501
 BMC50659I DB2 CATALOG LEVEL IS V13R1M501
 BMC50660I DB2 HIGHEST ACTIVATED FUNCTION LEVEL IS V13R1M501
 BMC50661I DB2 CODE LEVEL IS V13R1M501

 BMC50471I BMC_BMCUTIL       ='BMCUTIL.CMN_BMCUTIL'
 BMC50471I BMC_BMCSYNC       ='BMCUTIL.CMN_BMCSYNC'
 BMC50471I BMC_BMCHIST       ='BMCUTIL.CMN_BMCHIST'
 BMC50471I BMC_BMCXCOPY      ='BMCUTIL.CMN_BMCXCOPY'
 BMC50471I BMC_BMCSMARTSWITCH='BMCUTIL.CMN_BMCSWITCH'
 BMC50471I BMC_BMCSSTRACKING ='BMCUTIL.CMN_BMCSSTRACK'
0
0
 BMC50102I *
 BMC50102I  UNLOAD LIMIT 10  INTERVAL 2
 BMC50102I         SHRLEVEL CHANGE CONSISTENT YES XBMID XBMDB2
 BMC50102I *
 BMC50102I       SELECT EMPL_LNAME, HIRE_DATE, DEPT_NO, SALARY_CODE
 BMC50102I            FROM BMC.EMPLS
 BMC50102I              WHERE SALARY_CODE ='H'
 BMC50102I *
 BMC50102I       SELECT EMPL_LNAME,EMPL_HIRE_DATE,EMPL_DEPT_NO,EMPL_SALARY_CODE
 BMC50102I            FROM BMC.RET_EMPLS
 BMC50102I              WHERE EMPL_SALARY_CODE ='S'
 BMC50102I *

 BMC51654I DIRECT YES IN EFFECT

 BMC51687I ESTIMATED ROWS FOR TABLE SPACE BMCEXDB.BMCEXATS PART 1 IS 110 FROM HURBA
 BMC51687I ESTIMATED ROWS FOR TABLE SPACE BMCEXDB.BMCEXATS PART 2 IS 110 FROM HURBA
 BMC51687I ESTIMATED ROWS FOR TABLE SPACE BMCEXDB.BMCEXATS PART 3 IS 110 FROM HURBA
 BMC51687I ESTIMATED ROWS FOR TABLE SPACE BMCEXDB.BMCEXATS PART 4 IS 110 FROM HURBA
 BMC51688I ESTIMATED ROWS FOR TABLE     BMC.EMPLS IS 440 FROM TABLESPACE
 BMC51687I ESTIMATED ROWS FOR TABLE SPACE BMCEXDB.BMCEXBTS PART 0 IS 1296 FROM HURBA
 BMC51688I ESTIMATED ROWS FOR TABLE     BMC.RET_EMPLS IS 1296 FROM TABLESPACE
 BMC51688I ESTIMATED ROWS FOR TABLE     BMC.HRLY_EMPLS IS 1296 FROM TABLESPACE
 BMC51688I ESTIMATED ROWS FOR TABLE     BMC.SAL_EMPLS IS 1296 FROM TABLESPACE
 BMC50004I UTILINIT PHASE COMPLETE.  ELAPSED TIME = 00:00:00


 BMC54000I SMARTSWITCH NOT SUPPORTED - NO BMC AMI UTILITIES VERSION FOUND
 BMC54003I SMARTSWITCH RULE: FORCE_NO_SWITCH  COMMENT: SMARTSWITCH NOT ACTIVATED, TABLE/ALIAS DOES NOT EXIST

 BMC50199I UNLOAD PLUS PROCESSING CONTINUES

 BMC51689I ESTIMATED ROWS FOR SELECT 1 IS 40
 BMC51689I ESTIMATED ROWS FOR SELECT 2 IS 10

 BMC51639I FOR DDNAME 'SYSREC01' DSN=ADU.EXAMPLE4.SYSREC01,DCB=(RECFM=VB,BLKSIZE=27998,LRECL=37)
 BMC51639I FOR DDNAME 'SYSREC02' DSN=ADU.EXAMPLE4.SYSREC02,DCB=(RECFM=VB,BLKSIZE=27998,LRECL=37)

 BMC50894I PAGE EXTERNALIZATION PROCESS STARTING AT   2/15/2022   3:13:46

 BMC50651I SPACE BMCEXDB.BMCEXATS PART(0) PSID(0002)
 BMC50651I SPACE BMCEXDB.BMCEXBTS PART(0) PSID(0007)

 BMC50895I PAGE EXTERNALIZATION PROCESS COMPLETE.  ELAPSED TIME =  00:00:00

 BMC50877I POINT OF CONSISTENCY ESTABLISHED AT RBA/LRSN = 000000002345750F9000

 BMC50041I 0: ZIIP  ENABLED (0) USING XBM SUBSYSTEM XBMB
 BMC50474I BELOW 16M = 8488K, ABOVE 16M = 1022368K, CPUS = 5
 BMC51701I MAX TASKS = 4, MAX PARTITIONS PER TASK = 1, SORTWKS PER TASK = 0, MAX OPEN PARTITIONS PER TASK = 1
 BMC50477I 2: PARTITION =    2, ROWS/KEYS = 5, I/O WAITS = 2 ,DDNAME = SYS00007
 BMC50478I 2: RDB LOCK WAITS = 0
 BMC50477I 3: PARTITION =    3, ROWS/KEYS = 5, I/O WAITS = 2 ,DDNAME = SYS00005
 BMC50478I 3: RDB LOCK WAITS = 0
 BMC50477I 1: PARTITION =    1, ROWS/KEYS = 8, I/O WAITS = 2 ,DDNAME = SYS00006
 BMC50477I 4: PARTITION =    4, ROWS/KEYS = 2, I/O WAITS = 2 ,DDNAME = SYS00008
 BMC50478I 1: RDB LOCK WAITS = 0
 BMC50478I 4: RDB LOCK WAITS = 0
 BMC51701I MAX TASKS = 1, MAX PARTITIONS PER TASK = 1, SORTWKS PER TASK = 0, MAX OPEN PARTITIONS PER TASK = 1
 BMC50477I 5: PARTITION =    0, ROWS/KEYS = 20, I/O WAITS = 2 ,DDNAME = SYS00009
 BMC50478I 5: RDB LOCK WAITS = 0
 BMC50476I DDNAME = SYSREC01, I/OS = 3, I/O WAITS = 3, RDB LOCK WAITS = 0
 BMC50476I DDNAME = SYSREC02, I/OS = 1, I/O WAITS = 1, RDB LOCK WAITS = 0
 BMC51671I UNLOAD STATISTICS:  2 ROWS PROCESSED FROM PARTITION 1
 BMC51686I UNLOADING OF DATASET 'DEMOCAT.DSNDBD.BMCEXDB.BMCEXATS.I0001.A001' READ 4 PAGES
 BMC51671I UNLOAD STATISTICS:  1 ROWS PROCESSED FROM PARTITION 2
 BMC51686I UNLOADING OF DATASET 'DEMOCAT.DSNDBD.BMCEXDB.BMCEXATS.I0001.A002' READ 4 PAGES
 BMC51671I UNLOAD STATISTICS:  2 ROWS PROCESSED FROM PARTITION 3
 BMC51686I UNLOADING OF DATASET 'DEMOCAT.DSNDBD.BMCEXDB.BMCEXATS.I0001.A003' READ 4 PAGES
 BMC51671I UNLOAD STATISTICS:  0 ROWS PROCESSED FROM PARTITION 4
 BMC51686I UNLOADING OF DATASET 'DEMOCAT.DSNDBD.BMCEXDB.BMCEXATS.I0001.A004' READ 4 PAGES
 BMC51672I UNLOAD STATISTICS:  5 ROWS PROCESSED FROM SPACE 'BMCEXDB.BMCEXATS', 15 NOT SELECTED, 0 DISCARDED
 BMC51686I UNLOADING OF DATASET 'DEMOCAT.DSNDBD.BMCEXDB.BMCEXBTS.I0001.A001' READ 1706 PAGES
 BMC51670I UNLOAD STATISTICS:  4 ROWS PROCESSED FROM TABLE 'BMC.RET_EMPLS', 16 NOT SELECTED, 0 DISCARDED
 BMC51672I UNLOAD STATISTICS:  4 ROWS PROCESSED FROM SPACE 'BMCEXDB.BMCEXBTS', 16 NOT SELECTED, 0 DISCARDED
 BMC51674I UNLOAD STATISTICS:  5 RECORDS WRITTEN TO DDNAME 'SYSREC01'
 BMC51674I UNLOAD STATISTICS:  4 RECORDS WRITTEN TO DDNAME 'SYSREC02'
 BMC51675I UNLOAD STATISTICS:  0 RECORDS DISCARDED DUE TO ERRORS
 BMC50041I 0: ZIIP NOT ENABLED (0) USING XBM SUBSYSTEM XBMB
 BMC50277I XBM STATISTICS: DSN='DEMOCAT.DSNDBD.BMCEXDB.BMCEXATS.I0001.A001   ', READS 5, HITS 0, WRITES 0, CACHE 0
 BMC50277I XBM STATISTICS: DSN='DEMOCAT.DSNDBD.BMCEXDB.BMCEXATS.I0001.A002   ', READS 5, HITS 0, WRITES 0, CACHE 0
 BMC50277I XBM STATISTICS: DSN='DEMOCAT.DSNDBD.BMCEXDB.BMCEXATS.I0001.A003   ', READS 5, HITS 0, WRITES 0, CACHE 0
 BMC50277I XBM STATISTICS: DSN='DEMOCAT.DSNDBD.BMCEXDB.BMCEXATS.I0001.A004   ', READS 5, HITS 0, WRITES 0, CACHE 0
 BMC50277I XBM STATISTICS: DSN='DEMOCAT.DSNDBD.BMCEXDB.BMCEXBTS.I0001.A001   ', READS 19, HITS 0, WRITES 0, CACHE 0
 BMC50004I UNLOAD PHASE COMPLETE.  ELAPSED TIME = 00:00:00

0BMC50006I UTILITY EXECUTION COMPLETE, RETURN CODE = 0

 

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