When running in a multiple address space DFSMShsm (MASH) configuration where XCF services are not available, the following should be considered:

• Long running functions on other DFSMShsm hosts (including those that start before automatic CDS backup) will not release the resources required to allow CDS backup to obtain an exclusive lock. This prevents starting CDS backup.
• The enqueue prevents all data set or volume-type functions from accessing the control data sets while they are being backed up. Therefore, you should carefully consider the best time to start backup of the control data sets.