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Parent Topic: Maintaining and Collaborating on Data
If administrators set data-aging rules, NI InsightCM Server automatically deletes historical data when specified conditions are true. Aging is useful for conserving space on the server. However, you might want to ensure data from a specific acquisition remains available for viewing regardless of aging rules. For example, if you observe an anomaly and you want to ensure you and others can view the data in the future, mark the data to be retained by NI InsightCM Server.
Complete the following steps to request that NI InsightCM Server retain the data associated with a specific acquisition:
The feature and sensor data remains accessible whenever the trend viewer time-axis contains the time at which the acquisition occurred.
|Note To export a TDMS file for a data event, expand the Action menu and select Data Events. Select an asset in the asset tree in the left of the Data Events dialog box. In the list to the left of the asset tree, select a data event with data sets and click Export.|
When you choose to retain data, NI InsightCM Server retains all the data associated with the sensor acquisition, not just the trend value or curve that was active when you clicked the Retain Data Event button. In other words, retaining data means you have access to feature values, the time waveform, and other measurements, such as the FFT curve.
If you no longer need historical data that you marked to be retained, complete the following steps to allow NI InsightCM Server to delete the data according to normal aging rules:
|Note If you delete a data event that is part of a stream, you will delete the entire stream.|
|Note The Data Viewer page prompts you to confirm that you want NI InsightCM Server to delete the data.|
When you remove an asset from the asset tree, NI InsightCM also deletes all data acquired for that asset.
Retaining and deleting data directly affects the data that NI InsightCM Server stores. Any user who connects to the NI InsightCM Server can mark data for retention, but you need special permissions to delete data.