> ## Documentation Index
> Fetch the complete documentation index at: https://docs.stigg.io/llms.txt
> Use this file to discover all available pages before exploring further.

# High availability architecture

Stigg's mission is to create a reliable and highly available solution that won't interrupt the mission-critical functionality of your application. To make sure that the critical paths are not affected, in case of a network error or if our services are unavailable for any reason, we have a few guardrails in place.

We prioritized the following SDK functions as "mission-critical":

* Accessing customer entitlements (P95 latency \<100ms)
* Reporting usage measurements (P95 latency \~200ms)

<img src="https://mintcdn.com/stigg/0D5VdrcG5EQiL9di/506cc4cfbd123f55470bc985c713eeb3cf2ab03802481800fd05348eb033091f-Services_Architecture_-_High_level.png?fit=max&auto=format&n=0D5VdrcG5EQiL9di&q=85&s=7f0a665917466593f62548cab69b34b9" alt="" title="" className="mx-auto" width="2226" height="885" data-path="506cc4cfbd123f55470bc985c713eeb3cf2ab03802481800fd05348eb033091f-Services_Architecture_-_High_level.png" />

|            | Management API                                                                                                                                    | Edge API                                                     |
| ---------- | ------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------ |
| Stack      | Route 53<br />Application Load Balancer<br />ECS, Fargate<br />Amazon Aurora Global Database (PostgreSQL)<br />SNS + SQS (Fanout)<br />AWS Lambda | CloudFront<br />AWS Lambda\@Edge<br />DynamoDB               |
| Deployment | Multi A-Z<br />Multi region (Active-Passive)<br />Automated failover                                                                              | Multi region (Managed by CloudFront)<br />Automated failover |
| Uptime SLA | 99.99%                                                                                                                                            | >99.9975%                                                    |