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seshareddy_p
New User
Joined: 16 Jun 2005
Posts: 7
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Hi
This is Seshu. I have a doubt on concadination, any body please clarify this.
Maximum how many dd statements we can concadinate?
Thanks & Regards
Seshu |
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David P
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Joined: 11 Apr 2005
Posts: 106
Location: Cincinnati Ohio
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Hi seshu,
I believe the limits for concatenation are :
For sequential data sets 255.
for PDS 16.
All suggestions are welcome.
David. |
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sudheer648
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Joined: 23 May 2005
Posts: 97
Location: Chennai
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| Yes i agree with david. |
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superk
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Joined: 26 Apr 2004
Posts: 4652
Location: Raleigh, NC, USA
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die7nadal
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Joined: 23 Mar 2005
Posts: 156
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But is this for concatenation..I think not. |
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somasundaran_k
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Joined: 03 Jun 2003
Posts: 134
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die7nadal
This limit will be applicable for concatenation also. But there is a caveat. There are utilities/programs which have some restrictions on the number of concatenated files.
Regds
-Som |
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superk
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Joined: 26 Apr 2004
Posts: 4652
Location: Raleigh, NC, USA
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| I just created and ran a generic job with 1000 concatenated QSAM datasets as input. It did not have any problems at all. |
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die7nadal
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Joined: 23 Mar 2005
Posts: 156
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| Thanks Superk for checking this out, I too checked with over 20 concatenated PDS and its running fine. But I remember reading the 256 and 16 somewhere. Maybe thats for an earlier version of JES. |
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brganeshbabu
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Joined: 23 Jun 2005
Posts: 34
Location: Chennai
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Hi all,
I believe for PDS max limit is 16 and for PS max limit is 255. The maximum number of DD statement that can be used in a Job step in 3273. I think everyone is checking that. You have to concatenate the datasets. Superk, could you please show me just 10 lines of the coding you have used to concatenate. I hope the sample must be like the one below, to concatenate 10 ps.
//CONCATDD DD DSN=FILE1,DISP=SHR
// DD DSN=FILE1,DISP=SHR
// DD DSN=FILE1,DISP=SHR
// DD DSN=FILE1,DISP=SHR
// DD DSN=FILE1,DISP=SHR
// DD DSN=FILE1,DISP=SHR
// DD DSN=FILE1,DISP=SHR
// DD DSN=FILE1,DISP=SHR
// DD DSN=FILE1,DISP=SHR
// DD DSN=FILE1,DISP=SHR
Correct me If I am wrong! |
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superk
Global Moderator
Joined: 26 Apr 2004
Posts: 4652
Location: Raleigh, NC, USA
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OK. I created a job to generate 1500 datasets. Each dataset is FB, LRECL=80, and has 10 records.
Then, I ran this job to concatenate and copy all 1500 datasets to a single output dataset.
| Code: |
//STEP0001 EXEC PGM=IEFBR14
//DD1 DD DSN=&SYSUID..TEST.COMB,DISP=(MOD,DELETE,DELETE),
// UNIT=(SYSDA,5),SPACE=(CYL,(1,0))
//*
//STEP0002 EXEC PGM=ICEGENER
//SYSUT2 DD DSN=&SYSUID..TEST.COMB,DISP=(,CATLG,DELETE),
// UNIT=(SYSDA,5),SPACE=(CYL,(100,100),RLSE)
//SYSPRINT DD SYSOUT=*
//SYSIN DD DUMMY
//*
//SYSUT1 DD DSN=&SYSUID..TEST.#0001,DISP=(SHR,DELETE,KEEP)
// DD DSN=&SYSUID..TEST.#0002,DISP=(SHR,DELETE,KEEP)
// DD DSN=&SYSUID..TEST.#0003,DISP=(SHR,DELETE,KEEP)
// DD DSN=&SYSUID..TEST.#0004,DISP=(SHR,DELETE,KEEP)
// .....
// DD DSN=&SYSUID..TEST.#1500,DISP=(SHR,DELETE,KEEP)
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And, the output dataset has exactly 15000 records.
Now, do I also have to setup a test to disprove that the same applies to the number of PDS's (i.e. that it would also be 3273), or is everyone willing to accept that 3273 is the limit regardless if the datasets are PS, PDS, PDS/E, and are concatenated to a single DD or assigned to unique multiple DD's? |
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parikshit123
Active User
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Joined: 01 Jul 2005
Posts: 269
Location: India
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Okay,
I belive that 3273 is the limit of dd statments which can be coded in a single JCL so its a limit of datasets which can be concatenated.
Correct me if I am wrong |
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