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milesUK
#1 Posted : Tuesday, February 09, 2010 11:54:14 AM
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Joined: 5/28/2009
Posts: 70
Location: Cheshire, UK
I first thought to place this in the Rapid PI - Analysis Framework (AFSDK) category as there is no specific MDB forum but settled on this location.

Can anyone shed any light on Heading Sets please? I have scanned many of the PI documents all of which tell me about configuration settings and how to create and edit heading sets but none have explained why I should be using them.

What are they used for?
Are they essential (or merely nice to have) for future, if not present, MDB or AF databases?

I am new to the MDB having created only 2 or 3 hierarchies for our (electricity) utility PI system and have not yet settled on a final design. My ratio of Aliases:Tags is around 1,500:13,000 which feels about right to me.

Looking forward to a productive discussion,

Miles
MilesUK
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RJK Solutions
#2 Posted : Tuesday, February 09, 2010 3:27:05 PM
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Joined: 6/20/2008
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Location: Cheshire, United Kingdom.
Hi Miles,

I have never had the need to use PIHeadingSets, PIHeadingSet, PIHeadings or PIHeading objects but I believe they are used more within the Batch world - maybe some of our members who are Batch users can shed some light on how they use them. All documentation points to hierarchical use.

In the future world of Batch you will be looking at PI AF and Event Frames, so MDB & PIHeadingSets will be a thing of the past. In fact, in the latest PI Server release you get an AF <-> MDB syncronisation utility so you can start migrating applications to use AF instead of MDB (I wrote a basic MDB->AF conversion utility some time ago). AF is the next generation (but greatly improved) MDB.

All structures I have built within MDB have just used nested PIModules to dictate the hierarchy, with PIProperties describing configuration data and PIAliases the link to the PI tags.

Cheers,

Rhys.
Principal Consultant
Real-Time Data Management @ Wipro Technologies
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milesUK
#3 Posted : Wednesday, February 10, 2010 11:02:48 AM
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Location: Cheshire, UK
Thank you Rhys. Most helpful - as always - I can happily ignore heading sets for now.
Regards,
Miles
MilesUK
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Michael
#4 Posted : Wednesday, February 10, 2010 9:15:25 PM
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You need the PIHeading to describe the hierarchical position of a PISubBatch. This was the only use I had.

But for the future of the PIBatchDB see Rhys' comment.

Michael (PIBatchDB user)
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