Resource Scheduling

Reconciliation maintains two separate schedules for each resource: one for incremental reconciliation, and another for full reconciliation.

Each resource is scheduled by a separate “requester” task. Configuring a reconciliation schedule for a resource in the reconciliation policy GUI configures the TaskSchedule for the requester task. This allows reconciliation to be controlled by an external task scheduler, if desired. It also minimizes the overhead of the reconciliation task. A reconciliation daemon that is not doing anything consumes very few resources, since it periodically polls an in-memory queue (rather than querying the database for resources that are ready to reconcile).

Reconciliation accesses each resource through a resource adapter. Reconciliation calls the adapter directly to list accounts, iterate accounts, or fetch an individual resource account. Reconciliation also accesses resources indirectly through Provisioner, and uses Provisioner to create a resource account or Waveset user from a resource account.

Reconciliation and Provisioner both maintain the account index. Also, reconciling a resource prunes the Account Index each time. The reconciliation task automatically removes any entry for an account that no longer exists on the resource, unless that account is owned by an Waveset user. Therefore, it should not be necessary to attempt to manually clear the Account Index for a resource.

Each Waveset server runs reconciliation as a daemon task. This means that the Waveset scheduler starts the reconciliation task immediately and automatically restarts the task if it dies.

Resource reconciliation is not automatically restarted. The ReconTask daemon itself is automatically restarted, which enables it to respond to any new request; but any request in process when the host server dies (or when the application server is shut down) is lost. The daemon does not restart resource reconciliation because it may be inappropriate to reconcile the resource at a time other than when requested.