Tag: High Availability

This post assumes a certain level of technical knowledge, including familiarity with DNS terminology, Wireshark, and Amazon Route 53 Resolver endpoints. Introduction The Domain Name System (DNS) is a critical service underpinning nearly the entire internet. As nearly every application begins with DNS resolution, a highly available and performant DNS architecture is crucial for application […]

Earlier this year, we released technical guidance regarding three advanced design patterns for highly available applications using Amazon CloudFront and Amazon Route 53. In this post, we dive deeper into CloudFront origin failover, Amazon Route 53 DNS failover, and the hybrid origin failover approach to further enhance the availability of your web applications. We also […]

Any web application using Amazon CloudFront benefits from the inherent high availability of this AWS service. It’s a globally distributed network that is immune to local hardware failures or network congestion. Furthermore, it’s built on top of the AWS global network, which provides better isolation from the public internet. Finally, it’s designed with various advanced […]

This is the second in a two-part blog post series about using the recently launched Amazon Route 53 Application Recovery Controller (Route 53 ARC) service. In Part 1, we introduced a single-Region stack, and set up Route 53 ARC features like routing controls, readiness checks, and safety rules to simplify recovery. In this post, we add a […]

This is the first of a two-part blog post series that shows how the recently launched Amazon Route 53 Application Recovery Controller (Route 53 ARC) service allows you to centrally coordinate failovers and recovery readiness of your application. Using Route 53 ARC with a sample single-Region and multi-Region infrastructure stack, this post provides guidance for […]

Load Shedding Load shedding is the practice of sacrificing enough application traffic to keep partial availability in the presence of an overload condition. Used in conjunction with strategies like load balancing, load shedding helps applications support service level agreements (SLAs) when increased traffic overwhelms available system resources. While the cloud’s elasticity reduces the need for […]