saravananj
New User
Joined: 23 Nov 2007
Posts: 17
Location: Chennai
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Hi All,
I tried using MAXSORT for an input of size 15GB, the maxsort job happend to consume 2 times the CPU time when compared to CPU time consumed by ordinary sort in the same LPAR.
Here are the JCLs I used for MAXSORT and ordinary syncsort,
| Code: |
//ALLOC EXEC PGM=IEFBR14
//BKPTDATA DD DSN=ID.BKPT.DATA,DISP=(NEW,CATLG),UNIT=WRK,
// SPACE=(1000,(500,50))
//SORT EXEC PGM=SYNCSORT,PARM='MAXSORT'
//SYSOUT DD SYSOUT=*
//SYSPRINT DD SYSOUT=*
//SORTWK01 DD UNIT=SYSSQ,SPACE=(CYL,(200,200))
//SORTWK02 DD UNIT=SYSSQ,SPACE=(CYL,(200,200))
//SORTWK03 DD UNIT=SYSSQ,SPACE=(CYL,(200,200))
//SORTWK04 DD UNIT=SYSSQ,SPACE=(CYL,(200,200))
.. and so on till....
..
//SORTWK50 DD UNIT=SYSSQ,SPACE=(CYL,(200,200))
//SORTIN DD DSN=MYINPUT,
// DISP=SHR
//SORTOUT DD DSN=MYOUTPUT,
// DISP=(,CATLG,DELETE),UNIT=(WRK,30),
// SPACE=(CYL,(800,400),RLSE),
// DCB=(RECFM=FB,LRECL=66,BLKSIZE=27984)
//SORTBKPT DD DSN=ID.BKPT.DATA,DISP=(OLD,KEEP)
//SORTOU01 DD DSN=&&SORT1,DISP=(,DELETE),
// SPACE=(CYL,(300,50),RLSE),UNIT=WRK
//SORTOU02 DD DSN=&&SORT2,DISP=(,DELETE),
// SPACE=(CYL,(300,50),RLSE),UNIT=WRK
//SORTOU03 DD DSN=&&SORT3,DISP=(,DELETE),
// SPACE=(CYL,(300,50),RLSE),UNIT=WRK
//SORTOU04 DD DSN=&&SORT4,DISP=(,DELETE),
// SPACE=(CYL,(300,50),RLSE),UNIT=WRK
//SORTOU05 DD DSN=&&SORT5,DISP=(,DELETE),
// SPACE=(CYL,(300,50),RLSE),UNIT=WRK
//SYSIN DD *
SORT FIELDS=(13,4,FI,A,21,4,FI,A,25,2,FI,A)
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This is the ordinary Sort JCL,
| Code: |
//SORT EXEC PGM=SYNCSORT
//SYSOUT DD SYSOUT=*
//SYSPRINT DD SYSOUT=*
//SORTWK01 DD UNIT=SYSSQ,SPACE=(CYL,(200,200))
//SORTWK02 DD UNIT=SYSSQ,SPACE=(CYL,(200,200))
//SORTWK03 DD UNIT=SYSSQ,SPACE=(CYL,(200,200))
//SORTWK04 DD UNIT=SYSSQ,SPACE=(CYL,(200,200))
.. and so on till....
..
//SORTWK50 DD UNIT=SYSSQ,SPACE=(CYL,(200,200))
//SORTIN DD DSN=MYINPUT,
// DISP=SHR
//SORTOUT DD DSN=MYOUTPUT,
// DISP=(,CATLG,DELETE),UNIT=(WRK,30),
// SPACE=(CYL,(800,400),RLSE),
// DCB=(RECFM=FB,LRECL=66,BLKSIZE=27984)
//SYSIN DD *
SORT FIELDS=(13,4,FI,A,21,4,FI,A,25,2,FI,A)
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I am also attaching the SYSOUTs of both these jobs for your reference. As per my understanding MAXSORT is supposed to have consumed lesser CPU. But in reality it is the other way round. Any reasons for not getting the desired savings?
Or did I miss something very specific to MAXSORT? |
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