Selectable Write Mode for Analyses

We are using Analysis for future data calculation. The "Replace" mode will be super helpful in predictive calculation in future type PI tag. If possible can this "Write Mode" switch be available at calculation level not server level. Thanks!!

To clarify, AF analyses actually use "Append" for real-time updates. The request is still valid though and would be super useful!

Just like Jason wrote; Analysis doesn't replace, but appends. And I would like to have the replace option added.

If there are multiple (input) triggers at the same time stamp for a given analysis, PI Analysis Service only acts on the first trigger. That is the first shortcoming that needs to be changed first. This is on our backlog, we just need to prioritize it with respect to all the other backlog items.

i want to add a clarification to this. As noted previously, the default is "append" and not "replace". In case there's a difference from archive and future files, this should apply especially to future tag streams. It's very common to get multiple forecasts for the same measurement. For example, if we have a future tag for temperature forecast, we often get updates to this forecast frequently. But the value is often in the calculation (analysis) that uses the weather (or other) forecast for a more important business need, like power demand, or power generation forecast. We often see a 7 day window of 15 minute temperature forecasts that are updated daily (after the model runs). This means any given 15 minute period will get many updates. The analysis that runs to create the power demand or power generation forecast will be run many times. We only really want to persist the most recent one (in most cases). Currently, each analysis result is persisted so that when you trend it, there's a vertical trend representing the variability in the forecasts, not the last one. There does not appear to be a simple way to address this now. Thanks.

Steve, will it be possible to replace events instead of append? We are working with future data and we would like to replace events in the analysis.

This would be very helpful. We are running analysis against Alarm and Events in order to filter them out + storing the result in another PI Point, if conditions are true. So we have 2 events with exact the same timestamp (also same milliseconds) which are currently skipped