A switchover between the time of the detection of the event that causes a switchover until the standby controller takes control is less then one CPU cycle.
This cycle time is defined:
-
for “cyclic” cycle times, by the MAST watchdog period of time
-
for “periodic” cycle times, by the MAST period of time
Application Response Time
But the standalone ART is increased by:
-
1 MAST watchdog if the switchover is due to an event in the primary CPU. This increase is due to execution in the “new” primary CPU of the instructions that was being executed in the “old” primary CPU before the switchover.
-
up to 1 MAST cycle if the switchover is due to a user command. The amount of ART increase depends on the amount of data transferred.
The output ART is increased by:
