How Is a Replication Cycle Measured?

When the synchronization method is set to Manual, the remote replication session is manually started by the replication administrator. When the replication method is set to Timed wait when synchronization begins or Timed wait when synchronization ends, the timer starts to measure time when synchronization starts or completes. The timer measures time differently for different phases and operations. The following explains how the timer works.

Normal Conditions

·         Pair creation

When you are creating a pair, no timer is created.

·         Data synchronization

When a synchronization task starts, the system creates a timer according to the synchronization method. Only when the synchronization method is Timed wait when synchronization begins or Timed wait when synchronization ends, the system creates a timer. When other synchronization methods are used, no timer is created.

§  Timed wait when synchronization begins: The system creates a timer to measure time when a synchronization task starts and creates another timer after the specified period when the next synchronization starts. If a synchronization task is not completed within the period measured by the timer, the synchronization method is changed to Timed wait when synchronization ends and the next synchronization starts immediately after the current one is complete.

§  Timed wait when synchronization ends: The system creates a timer to measure time when a synchronization task is complete and creates another timer after the specified period when the next synchronization ends.

·         The system deletes the timer when the pair state is Split, Interrupted, or Invalid.

Synchronization Method Change

Changing the synchronization method will change the timer and therefore affects the synchronization progress. For details about how the timer changes with the synchronization method, see Table 1and Table 2.

 NOTE:

- indicates that the timer does not exist and will not be created.