Create a new DSN. Assign that new DSN to have a DATACLAS which is not compressed. Use a utility such as IDCAMS REPRO, IEBGENER, or DFSORT to copy the data from the old DSN to the new DSN. Back up the new DSN.
//COPY EXEC PGM=ICEGENER //SYSPRINT DD SYSOUT=* //SYSIN DD DUMMY //SYSUT1 DD DISP=SHR,DSN=compressed.dsn //SYSUT2 DD DSN=new.uncompressed.dsn, // DISP=(NEW,CATLG),DCB=compressed.dsn, // SPACE=(...),UNIT=sysda, // DATACLAS=dcnocomp Where the data in lower case in the JCL is what you need to specify yourself. I used ICEGENER which is DFSORT's high speed copy program. Of course, this assumes you have the proper authority to create a DSN with a given DATACLAS. For example, Production Control can do this (override the DATACLAS), but our programmers cannot. On Sun, May 4, 2014 at 10:20 PM, Victor Zhang <victor_wor...@aliyun.com>wrote: > What I am facing a problem is : > When I tried to backup compressed dataset that have compression set to be > on in its data class, the backup speed will slow down dramatically. > For example, when I backup z/os 1.13 sysres volume, I got speed of about > 40MB/s, however, when backup data that have its data class with compression > set to be on, the speed dropped to 20MB/s, the backup program is ADRDSSU. > > In RMM, I can see the tape block size is 262144 bytes, however from DAT, I > can't see 262144, which is very strange.That's the reason I am asking this > question again. > > I am trying to copy the compressed data to be an uncompressed one, > however, I failed to do that, can anyone give me suggstion on how to > uncompress a dataset and copy it to a new loacation, so that I can backup > the uncompressed data? > > Regards > Victorh > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN > -- There is nothing more pleasant than traveling and meeting new people! Genghis Khan Maranatha! <>< John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
