Have option to enable exception on Connectors.
There are use cases where data is sent over networks with latency (satellite link, for example) so being able to filter out noise at the connector is important. This is also important when a connector sends data to a local PI Server in the field (low latency), but then PItoPI is used to send snapshot updates to a central PI Server over a high latency link.
Brent Bregenzer
shared this idea
4 comments
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KPRoth
commented
In addition to latency, there are also bandwidth related costs to be considered. One example is passing data back from a field site over a cellular m2m link, where bandwidth is paid for by the megabyte. Another example, which I'm specifically running into with the PI Connector for GE e-terraHabitat (HabConnect), is when the resulting snapshot stream is being routed through the OWL Pi Transfer Service (and their data diode network security device) from a SCADA or DMZ Pi server out to a Corporate Network Pi server. The OWL device is purchased based on the expected transfer bandwidth.
I want to add that I find it disappointing that PI Interfaces (including the one for e-terraHabitat) tended to support Exception Deviation settings to pre-filter snapshot data, but that PI Connectors do not support this mechanism. It seems clear that there are many benefits to adding the option to support exception deviation to connectors.
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Gabriel Verreault
commented
In response to Dan Louchbaum, "For Hi Speed connectors on manufacturing..."
In my comment about compression, I meant that every event sent by the connector to the relay (this is not a PI Event, an 'event' can contain thousand of data values), are compressed (file compressed), so it would limit the bandwidth usage between the 2 components -
Dan.Louchbaum
commented
For Hi Speed connectors on manufacturing network, but PI DA on Enterprise network, significant traffic routes through the firewall. Compression helps the data recorded but not the traffic, which is why Exception is very important.
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Gabriel Verreault
commented
PI Connectors with the relay configuration (2.x) compress the data before sending it to the relay which would allow for a reduction of network traffic