Learn about reconciliation of event frames

When PI Analysis Service is restarted after short down-times, it initiates automatic backfilling concurrently with real-time analysis.

Note: With PI Server 2015 and PI Server 2015 R2, PI Analysis Service does not initiate the automatic backfilling process if down-time is greater than 72 hours. With PI Server 2016, you can configure the MaximumAllowedAutoBackfillingSpanInHours configuration parameter in the PI Analysis Service to specify the desired time.

When PI Analysis Service restarts, it will reconcile the open event frames. When automatic backfilling for analyses is completed, asset analytics determines if there are event frames to be reconciled and, accordingly, starts the reconciliation phase. Event frame reconciliation may be necessary for any in-progress event frames that cannot be closed within the auto-backfilling time range because no closing event can be found. These event frames may be generated in either of these ways:

• The event frame may be already present when the analysis service was stopped

• The event frame may be newly created during auto-backfilling

Such in-progress event frames may have to be reconciled with those generated during real-time evaluation.

When you select an analysis using the Analysis tab or the Management plug-in, an orange icon ( ) in the analysis window indicates that the event frame reconciliation is pending completion. Hover over the icon to see details such as the number of events being processed, start and end times, and the time of last evaluation. When reconciliation is complete, the icon turns from orange to green.