PagerDuty has successfully migrated its primary infrastructure from the US-East region to US-West (Oregon) on AWS, completing the process without any downtime on June 19. This strategic move addresses the issue of correlated failures experienced by over 20% of its customers who operate on AWS in the US-East region, where outages previously resulted in increased load and capacity loss for PagerDuty. By relocating, PagerDuty has alleviated these risks, while still maintaining a fully redundant hot-backup on a separate provider. Looking forward, PagerDuty plans to implement a multi-data center setup and adopt a multi-node data store using Cassandra, with further details on the new system design to be shared soon.