Cloud Per-Second Billing — How Much Does It Really Save?

Google Cloud Platform

Starting with the easiest one, Google Cloud Platform (GCP), you may not be seeing a significant change, as most of their services were already billing at the per-minute level, and some were already at the per-second level. The services moved to per-second billing (with a one-minute minimum) included Compute Engine, Container Engine, Cloud Dataproc, and App Engine VMs. Moving from per-minute billing to per-second billing is not likely to change a GCP service bill by more than a fraction of a percent.

Amazon Web Services

On the Amazon Web Services (AWS) side of the fence, the change is both bigger and smaller. It is bigger in that they took the leap from per-hour to per-second billing for On-Demand, Reserved, and Spot EC2 instances and provisioned EBS, but smaller in that it is only for Linux-based instances; Windows instances are still at per-hour.

  • Marketplace Linux: Some Linux instances in the AWS Marketplace that have a separate hourly charge are also still on hourly billing (perhaps due to contracts or licensing arrangements with the vendors?), so you may want to reconsider which flavor of Linux you want to use.
  • Reserved instances: AWS does strive to “use up” all of the pre-purchased time for reserved instances, spreading it across multiple machines with fractions of usage time, and per-second billing can really stretch the value of these instances.
  • Minimum of one-minute charge: Both GCP and AWS will charge for at least a minute from instance start before per-second billing comes into play.

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