Extending IOVF if an out-of-space condition occurs

To extend the IOVF

1. Ensure that adequate space is present on the primary volume of the target area data set to accommodate the request before trying to increase the IOVF portion during the Extend function. If adequate space is not present, allocate additional volumes to the area data set by using IDCAMS ALTER ADDVOLUME.

   Note

   If an IDCAMS ALTER ADDVOLUME is used while the area data set is opened and allocated (online to IMS), the data set must be closed and reopened so that VSAM can recognize the added volume. Use the /DBR command to close the data set, and the /STA command to reopen the data set.

2. Run the Extend function by using the EXTEND_IOVF keyword to specify the amount of space to add.
3. When the Extend function is complete, the EXTEND Area Summary Report from the PFPRPTS DD statement shows the new ROOT parameter for the DBD source. Use the values that are indicated to update the DBD definition to include the IOVF extension. Message BMC110000I is also issued, indicating the extended blocks and that the DMAC update has completed.

This section contains the following topics:

• Sample control statements for extending IOVF by 50 UOW, or 50 cylinders
• Sample output when adding 50 UOW to the IOVF portion
• Subsequent maintenance on the DEDB post IOVF Extend