CQS structure repopulation

Structure repopulation is a process by which CQS clients repopulate a failed resource structure. CQS does not support structure recovery for resource structures because CQS does not log or checkpoint resource updates.

If a resource structure and its duplex fail, the CQS clients can repopulate the resource structure. CQS attempts to allocate a new structure. If this allocation is successful, CQS notifies its clients to repopulate. The CQS client or clients must then repopulate the structure. Any resources that were kept only on the resource structure are lost.

If CQS fails to allocate a new structure, CQS notifies the client that the structure failed. If the sysplex environment changes later and CQS is eventually able to allocate a new resource structure, CQS notifies the client to repopulate at that time. Alternately, correct the environmental problem that caused the structure allocate to fail so that the structure can be allocated and repopulated.

CQS does not coordinate resource structure repopulation between CQS clients; clients must synchronize resource structure repopulation if desired. Structure repopulation does not guarantee the restoration of all objects; some objects might be lost.