Implementing Db2 storage groups

A storage group is a set of storage objects on which Db2 for z/OS data can be stored. Db2 uses storage groups to allocate storage for table spaces and indexes, and to define, extend, alter, and delete VSAM data sets.

You have the following options for creating storage groups and managing Db2 data sets:
  • You can let Db2 manage the data sets. This option means less work for Db2 database administrators.
  • You can let SMS manage some or all of the data sets, either when you use Db2 storage groups or when you use data sets that you have defined yourself. This option offers a reduced workload for Db2 database administrators and storage administrators. For more information, see Enabling SMS to control Db2 storage groups.
  • You can define and manage your own data sets using VSAM Access Method Services. This option gives you the most control over the physical storage of tables and indexes.