Atlassian Exceeds 99.9999% Of Availability Using Sidecars and Highly Fault-Tolerant Design
![A diagram depicting Atlassian's Tenant Context Service's Architecture](https://eranstiller.com/wp-content/uploads/2022/09/Atlassian-Header-TCS-Architecture.png)
Atlassian recently published how it exceeded 99.9999% of availability with its Tenant Context Service. Atlassian achieved this high availability by implementing highly-autonomous client sidecars, able to proactively shield themselves from complete AWS region failures. Sidecars query multiple services concurrently to accomplish this goal and ensure that requests are entirely isolated internally.