The OAM address space uniquely identifies
the active OAM session. Start the OAM address space if you plan to
use the file system sublevel, optical devices, or tape devices for
storing objects and OSMC functions or if you plan to delete objects
within your data storage environment.
Restrictions for OAM address spaces: There
are four address space restrictions that apply to each OAM session,
regardless of whether it is part of an OAMplex:
- Only one OAM address space can be active in the z/OS system.
- Only one DB2 subsystem can be associated with the active OAM address
space.
- Optical devices can only be directly accessed by the owning OAM
address space. However, requests for the optical devices can be shipped
to the OAM in an OAMplex that owns the optical devices by using the
XCF messaging service.
- Specifying a region size other than 0 MB on the OAM-started procedure
JCL may result in storage shortage abends, especially during an OSMC
cycle.