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Historian Storage Requirement Approximation

Mar 12, 2012 at 11:58 PM

I'm trying to come up with a back of the envelope estimation of historian storage requirements.

Looking at the .d format specification, if I presume that the the DataBlockCount defaults to a relatively high number (what is the default?), is it fair to presume that the storage required per sample is 10 bytes (4 for offset, 2 for flag, 4 for measurement)?

If so, say for a PMU I planned on storing the following points in the historian:

  • Phase A Magnitude
  • Phase A Phase
  • Phase B Magnitude
  • Phase B Phase
  • Phase C Magnitude
  • Phase C Phase
  • Freq Deviation
  • Freq Rate of Change

Would it be fair to say I would need approximately 80 bytes of storage for ever sample of the above points?


Mar 27, 2012 at 8:10 PM

You can use this spreadsheet to calculate the storage requirements of .D historian files:


Marked as answer by ritchiecarroll on 11/4/2013 at 9:48 AM