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Maximum size for a DSNTYPE LARGE DATASET

 
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sam01
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Joined: 03 Jan 2019
Posts: 9
Topics: 4
PostPosted: Fri Feb 01, 2019 3:38 am    Post subject: Maximum size for a DSNTYPE LARGE DATASET Reply with quote
Hello, i'am trying to allocation a Huge dataset wich size more than one To.
I wonder if there a maximum size for a dataset.

I knwow the limit of a DSNTYPE LARGE Dataset in one volume :

https://www.ibm.com/support/knowledgecenter/SSLTBW_2.3.0/com.ibm.zos.v2r3.idad400/d4001.htm

But, in my case, we have only M27 volume.
So my allocation is :

Code:


//SORTIN   DD DISP=SHR,DSN=BIG.TAPE.DATASET,
//SORTOUT  DD DSN=HUGE.DASD.DATASET,,         
//            STORCLAS=SCBIG,VOL=(,,,59),                 
//            UNIT=DISK,DSNTYPE=LARGE,                     
//            DISP=(,CATLG,CATLG),                         
//            SPACE=(CYL,32000),                           
//            DCB=(DSORG=PS,RECFM=VB,LRECL=2400)           




so we can calculate the max allocation : 59*32000*15=28320000 trks
so 1,5 To.

If i'm right, the maximum size i can allocate far a dataset in, 1,To, i can't do more....?
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kolusu
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Joined: 26 Nov 2002
Posts: 12367
Topics: 75
Location: San Jose
PostPosted: Fri Feb 01, 2019 2:48 pm    Post subject: Reply with quote
sam01,

Since you are allocating everything in PRIMARY space, you need to have a volume that has 32000 cylinders free or else it will fail. Even though you mention you have MOD-27 it can have anywhere between 30051 to 32760 cylinders.

You can try with lower primary value but spread across multiple volumes with Guaranteed space

Something like this
Code:

//            SPACE=(CYL,(3200,1000),RLSE),VOL=(,,,10)


Each volume will be allocated with 3,200 cylinders of primary space on 10 volumes which would make up to 32,000 cylinders.
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