OpenIDM Integrator's Guide
Chapter 11. Scheduling Tasks and Events

By default, scheduling information, such as schedule state and details of the schedule execution, is stored in RAM. This means that such information is lost when OpenIDM is rebooted. The schedule configuration itself (defined in the openidm/conf/schedule- schedule-name.json file) is not lost when OpenIDM is shut down, and normal scheduling continues when the server is restarted. However, there are no details of missed schedule executions that should have occurred during the period the server was unavailable.

You can configure schedules to be persistent, which means that the scheduling information is stored in the internal repository rather than in RAM. With persistent schedules, scheduling information is retained when OpenIDM is shut down. Any previously scheduled jobs can be rescheduled automatically when OpenIDM is restarted.

Persistent schedules also enable you to manage scheduling across a cluster (multiple OpenIDM instances). When scheduling is persistent, a particular schedule will be executed only once across the cluster, rather than once on every OpenIDM instance. For example, if your deployment includes a cluster of OpenIDM nodes for high availability, you can use persistent scheduling to start a reconciliation action on only one node in the cluster, instead of starting several competing reconciliation actions on each node.

You can use persistent schedules with the default OrientDB repository, or with the MySQL repository (see Installing a Repository For Production).

To configure persistent schedules, set the "persisted" property to true in the schedule configuration file (schedule-schedule-name.json).

If OpenIDM is down when a scheduled task was set to occur, one or more executions of that schedule might be missed. To specify what action should be taken if schedules are missed, set the misfirePolicy in the schedule configuration file. The misfirePolicy determines what OpenIDM should do if scheduled tasks are missed. Possible values are as follows: