Structure rebuilds

Structure rebuild allows a connector to a structure to allocate another structure with the same name and reconstruct data in the newly allocated structure. Rebuilding allows connectors to change the location or attributes of the structure without having to disconnect.

VTAM® sets the size of the rebuilt structure equal to the current size of the original structure, unless there is a structure storage shortage or the policy size information is being changed across the rebuild. VTAM considers a shortage to exist if more than 80 percent of total structure storage is in use. If there is a shortage, and the current size is less than the maximum size, the rebuild structure size will be set to the maximum size. If the CFRM policy size information is being changed across the rebuild, the rebuild structure size will be set as follows:

If INITSIZE is not specified, the rebuild structure size is the value of SIZE in the CFRM policy definition.
If INITSIZE is specified and:
- The current structure size is greater than or equal to the INITSIZE value and less than or equal to the SIZE value, the current size is retained.
- The current structure size is less than the INITSIZE value, the INITSIZE value is used.
- The current structure size is greater than the SIZE value, the SIZE value is used.

See Structure rebuild for more information about structure rebuilds.