By default, Axxon PSIM uses internal synchronization. There is data interchange between computers in the distributed configuration (see Configuring the interaction of distributed system components):

  1. If a computer is in the distributed system, then all the events are sent just as they occur. This is online synchronization.
  2. If a computer in the distributed system lost connection with the distributed system and cannot interchange the events with other computers, then events that must be sent to this computer are stored in the database and sent on it after the computer is reconnected. This is offline synchronization.

If the computer has not been in the distributed system for too long, then the accumulated sequence of events can be quite long and processing of all these events can take much time. Thus, offline synchronization can be disabled.

Online synchronization can also be disabled, i.e. events won’t be sent.

Internal synchronization, both offline and online, can be enabled and disabled for all computers in the distributed system.


DB synchronization must be configured when any internal synchronization mechanism is disabled—see Configuring database synchronization and Configuring the Event Viewer databases synchronization.

Configure internal synchronization as follows:

  1. Go to the Programming tab of the System settings dialog window (1).
  2. In the objects tree, select the Security zone object (2). The settings panel of this object is displayed on the right side of the System settings dialog window.
  3. To disable offline synchronization, clear the offline checkbox in the Internal synchronization group (3).
  4. To disable online synchronization, clear the online checkbox in the Internal synchronization group (4).
  5. Click the Apply button (5).

Internal synchronization is now configured.