Hi, The JCL abended even before reaching the Limit of 48k set in our Shop. on every GDG deletion DD statement, we had 256 generations and it was same for 4 DD statements.
Is there any reason even if the TIOT size is set at 48k But the Job abends before the DD statement reached 2454 ? On Mon, Jun 20, 2016 at 12:30 PM, Jake Anderson <[email protected]> wrote: > Hi > > The TIOT started failing when the JCL started deleted a group of GDGs. > Using DISP=OLD,DELETE > > Jake > On Jun 20, 2016 2:32 AM, "Greg Dyck" <[email protected]> wrote: > >> On 6/18/2016 11:03 AM, Jake Anderson wrote: >> >>> Is there a way to know if the DD chain has approached the end or it has >>> approached the end of Chain. Is there a way to tweak the JCL to overcome >>> TIOT exceeded values ? >>> >> >> The TIOT is a fixed sized array of entries, not a chain. The size is >> defined in PARMLIB member ALLOCxx, with a maximum allowed size of 64K. Only >> when an allocation request fails due to insufficient TIOT space do you know >> it is full. >> >> The primary 'tweak' for SMS managed datasets that can reduce the space >> used for each DD in the TIOT is to reduce the dynamic volume count (DYNVOL) >> specification defined for the data class ( >> http://www-01.ibm.com/support/docview.wss?uid=isg3T1000065). >> >> It is possible to dynamically allocated datasets using the extended TIOT >> (aka, XTIOT). This requires the application be updated appropriately ( >> http://publibz.boulder.ibm.com/zoslib/pdf/oa34634.pdf). For non-VSAM >> datasets you must also change PARMLIB member DEVSUPxx to specify >> NON_VSAM_XTIOT=YES. VSAM datasets may be allocated using the XTIOT without >> any changes to PARMLIB. >> >> Greg >> >> ---------------------------------------------------------------------- >> For IBM-MAIN subscribe / signoff / archive access instructions, >> send email to [email protected] with the message: INFO IBM-MAIN >> > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
