Requesting that z/OS dynamic allocation use extended storage

IMS uses z/OS® dynamic allocation extensively to provide access to full-function and Fast Path databases.

The blocks that z/OS provides (DSABs and TIOTs) are put into low private storage, unless otherwise requested. Use the DBALLABOVE statement to change the default and put them into extended private storage. This parameter is applicable only for IMS DLIBATCH regions when it is specified in DFSVSAMP DD statements. It is ignored when it is specified in DFSVSMxx members that are used for online IMS regions.

Read syntax diagramSkip visual syntax diagramDBALLABOVE
DBALLABOVE
This statement changes the location of the DSAB and TIOT blocks that z/OS builds and dynamically allocates for IMS database data sets from low private storage to extended private storage.