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Originally published on Geo SCADA Knowledge Base by sbeadle1 | 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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