In a cloud-computing environment we pay for the services that we use. So main

criteria to measure a cloud based service its usage.

For computing resource we measure by usage in terms of time and the power

of computing resource.

For a storage resource we measure by usage in terms of bytes (giga bytes) and

bandwidth used in data transfer.

Another important aspect of measuring a cloud service is its availability. A

cloud provider has to specify the service level agreement (SLA) for the time

for which service will be available in cloud.

https://www.techopedia.com/definition/14469/measured-service-cloud-computing#:~:text=For%20example%2C%20metering%20for%20cloud,number%20of%20active%20user%20accounts.