![]() GlobalĪccelerator quickly reacts to changes in network performance to improve your users' application performance.Īmazon CloudFront is a fast content delivery network (CDN) service that securely delivers data, videos, applications, and APIs to customers globally with low latency, high transfer speeds, all within a developer-friendly environment.Įnable read-through caching on the Amazon Aurora database. GlobalĪccelerator routes traffic to the closest edge location by using Anycast, and then routes it to the closest regional endpoint over the AWS global network. To improve the user experience, Global Accelerator directs user traffic to the application endpoint that is nearest to the client, which reduces internet latency and jitter. ![]() Many applications, especially in areas such as gaming, media, mobile apps, and financials, require very low latency for a great user experience. This strategy enables workloads to achieve the low-latency network performance necessary for tightly-coupled node-to-node communication that is typical of HPC applications.Īdd an Amazon CloudFront distribution in front of the Application Load Balancer.Īcceleration for latency-sensitive applications Depending on the type of workload.Ĭluster ג€" packs instances close together inside an Availability Zone. You can use placement groups to influence the placement of a group of interdependent instances to meet the needs of your workload. When you launch a new EC2 instance, the EC2 service attempts to place the instance in such a way that all of your instances are spread out across underlying hardware to minimize correlated failures. Launch the EC2 instances in an Auto Scaling group spanning multiple Availability Zones. Launch the EC2 instances in an Auto Scaling group in two Regions and peer the VPCs. Launch the EC2 instances in a spread placement group in one Availability Zone. Launch the EC2 instances in a cluster placement group in one Availability Zone. If the remaining endpoints are unable to handle the additional load and they fail, Route 53 reverts to distributing requests to all three endpoints. Similarly, if an application is overloaded, and one out of three endpoints fails its health checks, so that it's excluded from Route 53 DNS responses, Route 53 distributes responses between the two remaining endpoints. An application can respond to users but still fail health checks, so this provides some protection against misconfiguration. In this special mode, when all records are considered unhealthy, the Route 53 algorithm reverts to considering all records healthy.įor example, if all instances of an application, on several hosts, are rejecting health check requests, Route 53 DNS servers will choose an answer anyway and return it rather than returning no DNS answer or returning an NXDOMAIN (non-existent domain) response. How Amazon Route 53 averts cascading failuresĪs a first defense against cascading failures, each request routing algorithm (such as weighted and failover) has a mode of last resort. When the primary resource is unhealthy, Routeĥ3 responds to DNS queries using the secondary record. When the primary resource is healthy, Route 53 responds to DNS queries using the primary record. To create an active-passive failover configuration with one primary record and one secondary record, you just create the records and specify Failover for the routing policy. If all the primary resources are unhealthy, Route 53 begins to include only the healthy secondary resources in response to ![]() When responding to queries, Route 53 includes only the healthy primary resources. Use an active-passive failover configuration when you want a primary resource or group of resources to be available the majority of the time and you want a secondary resource or group of resources to be on standby in case all the primary resources become unavailable. Route 53 will only send requests to the instance if the health checks fail for the ALB. Set up a Route 53 active-active configuration with the ALB and an Amazon EC2 instance hosting a static error page as endpoints. Add the backup static error page hosted within an Amazon S3 bucket to the record so the traffic is sent to the most responsive endpoints. Update the Route 53 record to use a latency-based routing policy. Direct traffic to a static error page hosted within an Amazon S3 bucket when Route 53 health checks determine that the ALB endpoint is unhealthy. Set up a Route 53 active-passive failover configuration. Then, create custom error pages for the distribution. Point a Route 53 alias record to an Amazon CloudFront distribution with the ALB as one of its origins.
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