Page History

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• Name
  
  • The name of the History Store.
• Enabled
  
  • Checkbox to enable/disable the History Store. Not selected by default.
• Type
  • The type of History Store.
• Edge Node Tag Capacity
  • The maximum number of tag change events to store, for each from tags directly at the edge node folderlevel, before dropping the oldest stored tag change event for that edge node.
  • A tag change event is triggered by either a change in value or quality and results in the tag's Qualified Value (which has three attributes of value, quality and timestamp) being stored. 
  • The Edge Node Tag Capacity This parameter is independent from , and in addition to, the Device Tag Capacity
• Device Tag Capacity
  
  • The maximum number of tag change events to store, for each device folder, before dropping the oldest stored tag change event for that device.
  • A tag change event is triggered by either a change in value or quality and results in the tag's Qualified Value (which has three attributes of value, quality and timestamp) being stored.
  • This parameter is independent from the Edge Node Tag Capacity
• Flush Quantity
  
  • The maximum number of tags to publish in a single message upon reestablishing communication.
    
• Flush Period
  • The period to wait in milliseconds between publishes when flushing messages upon reestablishing communication.

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