For EC2 (and related services), the credits available are: AWS offers service credits for non-compliance with ALS working time, but it is important to note that they are not applied automatically. To obtain service credits for downtime, AWS customers must assert a right to credit by opening a business in the AWS assistance centre with the words “SLA credit requirement” in the subject line and specifying the details of the dates and times of defaults or failures for which you use secure credits with protocols and resource IDs for the services concerned. If service credits are available for loss, they are normally used as credit on future invoices for the same service. The SLA operating time varies depending on the type of S3 service and the guaranteed operating time varies from 99.9% to 99%. AWS support response times are separated from each SERVICE-Uptime-SLAs. Response times vary between the 3 AWS support plans available – developers, businesses and businesses. To facilitate the comparison, I have listed the available response times and associated support costs in the table below. Don`t expect a 15-minute support response if you only pay for a business support plan! Although, in my experience, AWS support is both fast and effective. For all RDS areas hosted in multiple availability areas (the “Multi AZ” setting is defined as “True”), Amazon guarantees 99.5% operating time on each monthly billing cycle.
This allows up to 3.65 hours of downtime per month. For applications that cannot tolerate downtime, customers should consider hosting their databases in multiple regions or using another database service, such as Amazon Aurora, which has an ALS with a 99.99% operating time. The service credits available for S3 services (excluding those mentioned above) are: This Amazon Compute Service Level Agreement (this “SLA”) is a policy for using the included services (below) and applies separately to each account that uses the included services. In the event of a conflict between the terms and conditions of this ALS and the terms of the AWS customer agreement or any other agreement with us regarding your use of our services (the “Contract”), the terms of this ALS apply, but only to the extent of such a conflict. The terms used in this agreement, but which are not defined here, have the meaning of the agreement. So you need to consider some important things when trying to understand Amazon`s service level agreements. The most important advice I would offer is not to rely on service level agreements to guarantee the operating time of your applications. The ALS provides some guidance on the hours of operation you can expect, but the service credits offered, provided you remember to claim them, will likely be unlikely to compensate for the downtime your application is experiencing, and the likely business consequences in terms of lost productivity or even lost revenue. All S3 services have a guaranteed operating life of 99.9%, with the exception of the following services, which are guaranteed for 99% of operating time: It`s also important that you make your application infrastructure observable – if you don`t recognize service outages, you can`t claim claims against ALS, so you may miss out on credits.