Calculating Metering Metrics

This metric is computed by picking the "offloaded" value, in gigabytes, in the collected dashboard info stats from the tiering section. At any time, it gives the total amount of data offloaded to cold tiers for that cluster in gigabytes. The dashboard information is collected every 15 mins by the metering daemon.

This metric is also computed from the same series of collected dashboard info stats from the tiering section. It is the difference between consecutive values of "offloaded" in the series, ignoring negative values, and summing the series of positive values over the billing period.