When you add space to the database, new database directories
are now available for immediate use and parallel I/O performance is
improved.
You can add directories to the database by using the
EXTEND DBSPACE command. In Version 7.1, the updates for
this operation include distributing data across all database directories
and then reclaiming unused space and returning it to the system. Because
redistribution operations take considerable system resources, plan
ahead when you want to add space to the database. You must complete
the process while the server is not handling a heavy load.
For detailed requirements, see the EXTEND DBSPACE command.
As part of these enhancements, a new server utility, DSMSERV EXTEND DBSPACE, is available to perform the same
function as the EXTEND DBSPACE command, while the
server is offline.