Extending an SMS-managed, non-striped GSAM data set

When you convert GSAM data sets to SMS-managed data sets, consider converting to SMS-managed striped data sets, or at minimum, converting to striped data sets, before the maximum number of volumes (59) for a data set is reached.

Attention: If the installation must use non-striped data sets for GSAM databases, and a data set full condition forces you to add a new volume to the data set, be aware that the maximum number of volumes for a data set is 59 volumes. As you approach this limit, copy the data set by using a larger space allocation value before the data set volume limit is reached. If the volume limit is reached and an abend occurs, you will be unable to perform a GSAM XRST. The copy of the data set using the larger space allocation must be completed after a job that has ended normally. After the data set is copied, GSAM XRST cannot be done using checkpoints taken before the data set was copied.

To extend an SMS-managed, non-striped GSAM data set:

Procedure

  1. Under SMS, add extra volumes to the storage group, if necessary, and increase the number of volumes allowed for the DATACLAS keyword.
  2. Using IDCAMS, enter the command ALTER dsn ADVOL(*) to indicate that additional volumes are available to the data set.