8 Storage Management with DB2 for OS/390
volumes, closing it on volumes to be removed), and finally removing the volumes
you want to exclude from the Storage Group. All those functions can be
accomplished while the data is on line. Data sets that were unmovable,
never-closed, or never reallocated could be moved using remote copy
techniques, then, after a short outage, the critical application can be switched
onto the new volumes.
2.2.6 Performance Management
Monitoring I/O performance of DB2 requires also teamwork between DB2 and
storage administrators to adopt a common approach with tools of both disciplines
in analyzing performance situations. Performance monitoring should be done at
the Storage Group level to have a consistent action.