So from the ALLOCxx definition in MVS Init and Tuning z/OS V2.10.
Table 1. Relationship size of TIOT and maximum number of DDs allowed
Dec Hex Size of TIOT Maximum number Maximum number of
DDs allowed
of single unit DD Allowed when every DD requests
the maximum number of units (59)
16 10 16384 (16K) 816 64
17 11 17408 (17K) 867 68
24 18 24576 (24K) 1225 97
25 19 25600 (25K) 1277 101
32 20 32768 (32K) 1635 129
40 28 40960 (40K) 2045 162
48 30 49152 (48K) 2454 194
56 38 57344 (56K) 2864 227
64 40 65536 (64K) 3273 259
>From this definition I would think the concatenated would count as 1 but be
>careful of the TIOT size if each one has more than one volume for it.
Just a guess
Lizette
> -----Original Message-----
> From: IBM Mainframe Discussion List [mailto:[email protected]] On
> Behalf Of Mitch Mccluhan
> Sent: Monday, August 22, 2016 8:42 AM
> To: [email protected]
> Subject: Re: Limit on the number of concatenated datasets
>
> Joe,
>
> There is one, yes. I believe it is 256. Advice from everyone else?
>
> Regards,
>
>
>
> Mitch McCluhan
> [email protected]
>
>
>
>
>
> -----Original Message-----
> From: Reichman Joseph <[email protected]>
> To: IBM-MAIN <[email protected]>
> Sent: Mon, Aug 22, 2016 10:38 am
> Subject: Limit on the number of concatenated datasets
>
> Hi
>
> I looked in the JCL reference and DFSMS bookshelf and did not see a limit on
> the number of concatenated datasets
>
>
> Would anybody know if there is one ?
>
>
> Thanks
>
> Joe Reichman
> Joe Reichman
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