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" <gregd...@pobox.com> 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 lists...@listserv.ua.edu with the message: INFO IBM-MAIN > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
