Using global resource serialization with export processing

To prevent multiple hosts from attempting to simultaneously process logical volumes in the export category, a SYSTEMS level enqueue, similar to cartridge entry processing, is used. The resource names are:

     QNAME—SYSZCBR
     RNAME—EXPORTED_CATEGORY_libname

It is possible to perform export processing without global resource serialization. The following are the consequences of unserialized processing:

Export completion processing occurs simultaneously in all processors. Each processor handles a subset of the exported volumes.
Some additional processing overhead takes place, due to concurrent processing of the same list of volumes.
The cartridge eject installation exit is entered once for each volume on each processor. The installation must account for this possibility when writing the exit.

Recommendation: Use global resource serialization.