AVEVA™ PI System™ Feedback Portal

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We created this site to hear your enhancement ideas, suggestions and feedback about AVEVA products and services. All of the feedback you share here is monitored and reviewed by the AVEVA product managers.

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Status No status
Product AVEVA™ PI System Access (PSA)
Categories PI SQL Client
Created by Derek Wong
Created on Aug 23, 2022

RELATED IDEAS

Allow the SDK connection priority for the RTQP Engine to be configurable

The RTQP Engine is currently only able to connect to the Primary Data Archive to retrieve data, regardless of the SDK Priority settings. The “PreferPrimary” connection priority is hardcoded into the RTQP engine and cannot be modified. For users who depend heavily on RTQP queries, this can place a very high burden on the primary PI Data Archive, limiting their ability to spread the load across their PI Collective. Unlike the PI Analysis Service, the RTQP engine currently cannot write back to the PI Data Archive or create tags, thus it seems unnecessary to force the “PreferPrimary” setting on the RTQP engine. Ideally, the RTQP Engine can be configured to take the AF SDK Priority preferences so users can decide which PI Data Archive has priority, giving the users more flexibility on how to load balance their PI Data Archive collective. The workaround of setting the Primary’s priority to “-1” is not always feasible, especially for those users who are limited to two member collectives as this would leave them with just one Data Archive member to serve data to the RTQP engine.
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  • MarkGoepel
    Reply
    |     Aug 23, 2022
    Thank you very much for raising this Derek. We currently run three AF/RTQP servers, behind a NLB to service a very large (> 100 high frequency queries - as well as heavy ad-hoc queries) and growing number of RTQP Queries. We do not have any plans to write back PI Tag configuration via this method - even after that functionality becomes available. Our automated Tag Configuration processes use AF-SDK & PIwebAPI. Derek also mentioned it above, and it would be my preference to also enable AF Analysis Service to honour the SDK Priority Preferences, as we also do not have analysis engine creating/modifying tag configuration. Hard coding config backs us into a corner. By all means put warnings and comments in the app.config files, but please allow us the flexibility to balance the load across our PI Platform.
  • John Messinger
    Reply
    |     Aug 23, 2022
    This is essential as we have customers that already have high data loads on the Primary DA, and this ability to manually set the Priority allows for some form of load balancing in a system that doesn't have any built-in LB capability.