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Trends, Historic Data and the Historian

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‎2021-06-09 07:17 PM

Trends, Historic Data and the Historian

Originally published on Geo SCADA Knowledge Base by Anonymous user | June 10, 2021 04:17 AM

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Geo SCADA Expert contains a Historian through which incoming data from remote devices can be historically recorded. The historian uses a proprietary high speed high capacity database engine to store historic data associated with events and point data. This data can later be retrieved in the form of trends, lists or directly with SQL queries.

Trends are graphical displays that plot the values of database points and time profiles. They allow you to view and compare the values of points over a specific period of time. This is particularly useful when you need to determine if there are any patterns in the data, for example, you may need to compare the level of water in 3 different rivers over a month period.

using trends to view historic and current data.  Also includes information on the historian, historic aggregates and historic data archiving.

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Configuring Appropriate Event and Historic Cache Sizes

Historic Data and Event Journal File Format

Historic Compression Settings Seem to be Ignored

Unexpected Historic Database Logging

Overview of Data Archiving

Display Progressive Trend As Bar Graph

Recovering from Lost or Damaged Archive Volumes

Viewing Archive Data in a Spreadsheet

Adding Historic Data to Internal Points

Adding Historic Data to Points

Historian Disk Usage

Importing History Using LoadDataValue and LoadDataFile

Finding large historic granules

Copying Historic data to third party applications like Excel

Streams

Memory Footprint of Unflushed Point Data In Memory

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