What searches have you done on IBM Main Archives and in www.ibm.com for TIOT information?
Have you done any internet searches? If so, what have you found out. It will depend on what task you are needing this information for. DB2 handles it different, than say a batch job. Have you looked at the INIT and Tuning guide for TIOT specifications. Have you looked at this link? http://www-01.ibm.com/support/docview.wss?uid=isg3T1000065 The size of the TIOT The TIOT size is specified in the ALLOCxx PARMLIB member and has a default of 32K. This is sufficient for 1635 data sets on a single volume and 129 data sets with the maximum of 59 volumes defined. Before specifying large values for DYNVOL, on the assumption that all expansion will then be handled, consideration should be given to the effect on the TIOT size of jobs with large numbers of DD cards. If a data set, with one primary and five candidate volumes, was in a data class with a DYNVOL of less than 7, then 24 bytes of TIOT space would be required. If the same data set was using a data class with a DYNVOL of 20, then it would require 80 bytes of TIOT space. Since the size of the TIOT (or the size of all the TIOT entries for a job) is limited to the size specified in ALLOCXxx, when large quantities of data sets with large DYNVOL values are concurrently allocated, it is possible to exhaust the space in the TIOT. This will result in allocation failures indicated by messages IEF240I or IEF491I for batch allocations or error reason codes 238 or 450 (hexidecimal) for dynamic allocations. Note that this is not a consideration for DB2, because it uses an interface to dynamic allocation, which creates an XTIOT. Lizette > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On > Behalf Of Jake Anderson > Sent: Saturday, June 18, 2016 11:04 AM > To: [email protected] > Subject: TIOT exceeded > > Hi > > 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 ? > > Jake > ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
