问题
This has been asked before differently last year but it has not received an authoritative answer.
The updated SLA says - "We guarantee that all websites running in a customer subscription will respond to client requests 99.95% of the time. No SLA is provided for Websites under either the Free or Shared tiers."
Does this unambiguously mean that SLA for a single instance VM on Basic / Standard tier of Azure Website is 99.95%? If not, what is the assurance?
回答1:
Yes, the SLA for any Azure Website on the Basic or Standard tier is 99.95%
Just having one instance of the site is enough
回答2:
The answer from mvark is contradictory with what the SLA page states, where it clearly says you need multiple instances and a traffic manager for 99.95%:
We guarantee that Web Apps, Mobile Apps, Logic Apps, and API Apps running in a customer subscription will be available 99.9% of the time, with a 99.95% SLA provided when multiple instances and traffic manager are used. No SLA is provided for Apps or sites under either the Free or Shared tiers.
回答3:
For any PaaS service SLA is inbuilt. So web sites or web app in app services internally managed to run with multiple instance; through app service plans. For you it is single instance only and behind the scene there can be multiple instances or shared instances. So you get SLA for single instance as well in web apps. This is not the case in Azure virtual machine world. In that case SLA and HA are two different things. Refer for more - https://sanganakauthority.blogspot.com/2017/06/azure-vm-sla-and-high-availability.html
来源：https://stackoverflow.com/questions/29506491/what-is-the-sla-for-a-single-instance-vm-on-basic-standard-tier-of-azure-websi