Summary: this document describes difference in setting in Hyper Historian Logger. Storage Limit Condition, Actions are described
Hyper Historian Logger - Delete Old Files
First test was done using the 'Delete Old Files' option. Condition is Minimum Time Extent and Minimum Total Size
Time is set to 1 hour and the size to 10MB
Conditions are checked every 1 minute
After the Size exceed 10Mb, the file is still in the folder, because Minimum Time Extent is not reached yet
After 1 hour, the file is deleted and new file is created
Hyper Historian Logger - Archieve Old Files
Now Delete Old FIles was switched into Archieve Old FIles
The archived ones are located by default in the same folder as the new ones. Now, both files are kept in this folder and won't be delated
The application has access to both files, including those that have been archived. The fact that a file is already archived does not mean that we cannot display the data on the graph or in the table
For the 'current' files, the SCADA/application has continuous access (as if they were kept open all the time and ready for data reading).
However, for the archived files, it needs to query the historian to access them. If we display many archieved historian data it might cause some delays in our diplay