Using SSM Global Application › How SSMGA Works › Global Status Table (GST)

Global Status Table (GST)

In addition to the LST, the global system maintains the consolidated resource status of all the local systems, including itself, in another RDF table called the GST (global status table). The structure of the LST and GST are identical.

• The SSM subtask invokes the SSMGAGBL request rule to perform both global and local system processing, as required.
• On the designated global system:
  • SSMGAGBL processes commands queued in the global command table. Command processing is suspended during the initial build or rebuild of the GST in order to prevent premature resource movement commands.
  • SSMGAGBL examines the global copies of the LST system records.
  • If a system record LUTIME is higher than the maximum global read timestamp previously processed for the system (GRTIME), another subtask is attached to read and process all the LST records whose LUTIME is greater than GRTIME for the system. This insures no global system processing delays by any one local system communication problem.