Hi,
I currently have a MongoDB Atlas cluster on tier M30 hosted on Google Cloud Platform (GCP) in the asia-southeast2 region. I’m planning to migrate the cluster to Amazon Web Services (AWS), specifically to the ap-southeast-3 region.
I noticed there’s an option to edit the cluster configuration and change the cloud provider and region directly.
Will this migration process be seamless (e.g., with zero or minimal downtime)? Or is there a better/recommended approach to move the cluster across cloud providers and regions?
Thank you in advance for your help!
Yes this is one of the most powerful capabilities that MongoDB Atlas allows. You can change a cluster from single to multi-region, or change from one region to another, or change the cloud provider of a cluster all without downtime: this is made possible by making these changes in a rolling manner across the distributed system while maintaining majority quorum.
(Note for completeness that there will be a momentary replica-set level election which takes a few seconds, which drivers by default deal with gracefully by taking advantage of retryable writes.
And separately note that network access to a cluster in one region or cloud provider may not be possible from another region or cloud provider without some special care, especially if you’re taking advantage of in-region private networking like Private Endpoints or VPC peering. One option would be to take advantage of public IP-level access on the IP Access List at least during the transition period.)
