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How many historical data sets should you allocate?

You can allocate as many or as few data sets as you need, up to the limit of 100.

Default customization provides for 3 data sets. When a data set is full, the historical recorder uses the next data set until that one is also full, and so on. When all the data sets are full, recording begins again with the first data set and the data is overwritten.

To determine the appropriate number of historical data sets for your site, collect sample data for one hour and then allocate the data sets according to how many hours worth of data you want to collect.

Note

You can use the DSLIST view to add historical data sets dynamically, as described in Adding-a-historical-data-set-dynamically.

Related topic

Understanding the historical database


 

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