The SPACEOPT software product (purchased separately) reorganizes volumes of a pubset in order to eliminate the fragmentation of the storage areas which develops over the course of time and to reduce the number of extents of the files.
SPACEOPT cleans up fragmentation by optimally relocating (reorganization) the file extents on the volumes of a pubset, see the “SPACEOPT (BS2000)” manual.
SPACEOPT will also reorganize open files. You should note the following:
File reorganization involves the actual physical reorganization of file extents. You should therefore only use this function when the I/O load of the volume being reorganized is low.
During file reorganization, SPACEOPT temporarily locks the corresponding BS2000 catalog entries. If a file is opened or expanded while reorganization is in progress, SPACEOPT will interrupt the reorganization and release the lock in order to allow the transaction to pass. After is has obtained the catalog lock, SPACEOPT resumes processing. This procedure is repeated by up to three times per file before the file is excluded from the reorganization.