After unzipping the zipped ps file, records are changed.

Rusikesh · Posted: Wed Jun 09, 2010 8:41 pm

I have executed the JCl to zip the PS file. after that unzip the zipped file, but unzipped file contains more records.
Please share your thoughts/suggestion for the same

Robert Sample · Posted: Wed Jun 09, 2010 9:09 pm

Since ZIP is not standard on a mainframe, you must be using a vendor package. Have you contacted the vendor for assistance?

Record formatting could cause this -- what is the input file DCB, what is the DCB of the zip file, and what is the DCB of the output file you unzip to?

Rusikesh · Posted: Thu Jun 10, 2010 11:54 am

thanks,
But the DCB parameters are same for input file and Unzipped file.
I tried for 5000 record it works fine, but when tried for millions of records then unzipped file contains more records.

Rusikesh · Posted: Wed Jun 16, 2010 9:15 am

Any one can share your suggestion or comments. If possible any other way to Zip and again Unzip the same PS files,provided the data should not change.

Robert Sample · Posted: Wed Jun 16, 2010 5:07 pm

Since I know of at least three vendor products (PKZIP, INFO-ZIP, ZIP/390) to create zip files on the mainframe, you haven't exactly told us enough information to help you.

No, the number of records should not change just by zipping and unzipping a file. However, the record counts very easily could change depending upon the parameters you specify for the zip operation and the parameters you specify for the unzip operation. In any case, this is something YOU are causing and hence is best addressed by contacting the vendor of the zip product you are using.

You can also use pax or tar on Unix System Services on a z/OS machine to create archive files. They are not zip files but share many of the same characteristics. You could also have your site support group install GNU ZIP which is an open source zip implementation that runs on Unix System Services. The .gz files created by GNU ZIP are a form of zip file, but GNU ZIP is not interchangeable with commercial zip products as they use patented algorithms that GNU ZIP is careful not to infringe upon.

Rusikesh · Posted: Fri Jun 18, 2010 9:17 am

I am using PKZIP product.
For ZIP the file I am using following Parameters,

ARCHIVE_OUTFILE(FILEOUT)
ARCHIVE_UNIT(SYSDA)
ACTION(ADD)
PATH(N)
INFILE(FILEIN)

and For UNZIP following parameters,

ECHO
ARCHINDD(FILEIN)
OUTVOL(NEW)
OUTDD(FILEOUT)
OUTUNIT(SYSDA)

Thanks.

Rusikesh · Posted: Mon Jun 21, 2010 9:34 am

Hello,
Any one has tried to ZIP the PS file with the help of PKZIP(utility) and again Unzip the Zipped file by PKUNZIP(utility). Please share the JCL/Ideas/Guideline.

Thanks

Robert Sample · Posted: Mon Jun 21, 2010 5:06 pm

I use ZIP/390, not PKZIP so I don't know much about PKZIP for MVS. However, if you want help with your problem, you're going to have to post the JCL you used -- the ZIP statements are completely useless for debugging. In particular, how are FILEIN and FILEOUT defined for the ZIP job and for the UNZIP job?

Rusikesh · Posted: Sun Jun 27, 2010 3:48 pm

Do I need to post the JCl ? Since, JCL contains only utility to zip the file and Utility to unzip the file(In other JCL), other parameters I already sent in previous post.
I am not aware about the ZIP/390.

Robert Sample · Posted: Sun Jun 27, 2010 7:41 pm

You posted:

Rusikesh · Posted: Mon Jun 28, 2010 1:23 pm

I have check the DCB parameters for input file as well as Output files both are same. please find JCL for ZIP and UNZIP the file,

//JOBCARD
/*ROUTE XEQ PKZIP
//PS020 EXEC PGM=PKZIP,REGION=0M
//STEPLIB DD DISP=SHR,DSN=SYS1.PKZIP.LINKLIB
//SYSOUT DD SYSOUT=*
//SYSPRINT DD SYSOUT=*
//FILEIN DD DSN=C8UST.E3USD207.INPUT.ZIP.VOL1,DISP=SHR
//FILEOUT DD DSN=C8UST.E3USD207.ZIPPED.VOL1,
// DISP=(NEW,CATLG,DELETE)
//SYSIN DD DSN=NB7736A.SHARU.ADHOC(ZIPDAT),
// DISP=SHR

NB7736A.SHARU.ADHOC(ZIPDAT)==> CONTAINS BELOW PARAMETERS,
-ARCHIVE_OUTFILE(FILEOUT)
-ARCHIVE_UNIT(SYSDA)
-ACTION(ADD)
-PATH(N)
-INFILE(FILEIN)

FILE NAME==> C8UST.E3USD207.INPUT.ZIP.VOL1
PARAMETERS..
DSORG:PS
RECORD FORMAT: FB
RECORD LENGHT:380
BLK SIZE: 27740

************************************
JCL TO UNZIP THE FILE
//JOBCARD
/*ROUTE XEQ PKZIP
//PS020 EXEC PGM=PKUNZIP,REGION=0M
//STEPLIB DD DISP=SHR,DSN=SYS1.PKZIP.LINKLIB
//SYSOUT DD SYSOUT=*
//SYSPRINT DD SYSOUT=*
//FILEIN DD DSN=C8UST.E3USD207.ZIPPED.VOL1,
// DISP=SHR
//FILEOUT DD DSN=C8UST.E3USD207.OUTPUT.UNZIP.VOL1,
// DISP=(NEW,CATLG,DELETE),UNIT=SYSDA,
// DCB=(DSORG=PS,RECFM=FB,LRECL=380,BLKSIZE=27740),
// DATACLAS=STANDARD
//SYSIN DD DSN=NB7736A.SHARU.ADHOC(UNZIPDAT),
// DISP=SHR

NB7736A.SHARU.ADHOC(ZIPDAT)==> CONTAINS BELOW PARAMETERS,
-ECHO
-ARCHINDD(FILEIN)
-OUTVOL(NEW)
-OUTDD(FILEOUT)
-OUTUNIT(SYSDA)

I have executed above both JCL still there is huge change in the output records.

Robert Sample · Posted: Mon Jun 28, 2010 7:06 pm

Rusikesh · Posted: Tue Jun 29, 2010 3:25 pm

Input File Record Count is 998309.
Zip File Record Count is 554
Output file Record Count is 1035251.
So. the Difference is (1035251-998309)=36942.
I will discuss with the Vendor.

Meanwhile, Is there any another utility(Apart form PKZIP and PKUNZIP) to ZIP and UNZIP the PS Files?

Rusikesh · Posted: Wed Jun 30, 2010 7:21 pm

Can we ZIP and UNZIP the file by any other method/utility..

Robert Sample · Posted: Wed Jun 30, 2010 7:46 pm

Zip is not standard on a mainframe, but must be purchased from a software vendor. It is unlikely that your site has purchased multiple packages to do the same thing, especially since the cost is thousands of dollars for each package.

Other possibilities:

FTP the file to your PC in binary and unzip it on the PC, then transfer the unzipped data to the mainframe

contact your site support group to see if they have installed gzip / gunzip which are open source zip implementations

move the file to Unix System Services and try using PAX on it