AWS SLA: keep your availability promise?

Are you offering availability of 99.99% or more to your clients? Bad news, you might not be able to keep your promise!

Recently AWS announced a bunch of new Service Level Agreements (SLA). Therefore, it is now possible to calculate the expected availability of most of the architectures on AWS.

Are you looking for a way to increase the expected availability of your architecture? Deploy your workload to multiple regions. But be warned, doing so comes with additional complexity caused by the need to synchronize your data between multiple regions.

Notes:

• Calculating for multiple regions, the result will be around 99.98% for expected availability.

References:

• How do you calculate the compound Service Level Agreement (SLA) for cloud services?

Calculating it in parallel is a little more complicated as we do need to consider what the percentage unavailability will be:

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