The two-site SRDF/S with ConGroup configuration provides disaster restart capabilities at site DC2. Figure 1 illustrates GDDR operation in the SRDF/S with Consistency Group environment.

Figure 1.                  GDDR SRDF/S with ConGroup

Figure 1 shows two GDDR C-Systems with their heartbeat communication paths, separate from the production disk and computer facilities. Each of the DC1 and DC2 production z/OS LPARs has Dell Consistency Group (ConGroup) software installed. SRDF/S and ConGroup ensure that at the point that GDDR receives notification of an unplanned or failure event, a point of consistency is already achieved.

In this environment, GDDR can do the following:

• Manage planned site swaps
• Restart processing at the secondary site following unplanned primary site events
• Perform standard operational tasks:

• IPL, system reset, activate, deactivate
• Trigger stop/start of business workloads

• Actively monitor for unplanned/failure events

• Sites
• Systems
• Loss of SRDF/S
• ConGroup trip
• Inter-site communication failure

• Provide Cyber Recovery from either site or from both sites