Retrieving from an interface node

Discussion created by RJKSolutions on Dec 8, 2011
Latest reply on Dec 12, 2011 by RJKSolutions

Can someone enlighten me somewhat.  


If I use the OSIsoft SI Input Adapter I can retrieve data from the PI Server and from an interface node.  How does the PI Interface Node set up work, does the SI input adapter connect to the PIBuffss session and get updates from there before the data hits the PI Server?  What is the definition of a "PI Interface Node" from the SI input adapter perspective?  Does the adapter get data before exception/compression is applied by PIBuffss?