In order to track usage of any resource, we first need to standardize the units we plan to count. In cloud computing, extreme granularity is possible using the data that exists in OpenStack databases, as well as using the metering project, Ceilometer. While there are many different meters that can be tracked, let's start by tracking the number of individual vCPUs used over time, amounts of memory over time, and disk usage down to the minute. However, letting users put together their own combinations of these three data points can result in tens of thousands of combinations. Therefore, in the OpenStack cloud, we use flavors to limit user choices. Flavors are virtual hardware templates that are logical groupings ...
Tracking usage and analyzing growth
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