We have successfully completed our core network and infrastructure maintenance in the primary data center, and this Friday between 8PM EDT (00:00 UTC) and 10PM EDT (02:00 UTC) we will be moving all services from our secondary data center in Colorado back to New York. All user-facing services will be moved including:
- All Q&A Sites (including Stack Overflow)
- Stack Overflow Talent
- Stack Overflow Jobs
- Stack Overflow Documentation
- Chat
- Stack Exchange API
- stackexchange.com
- Area 51
- Stack OpenID
- Providence
- Ad server
What you can expect:
Each of the services listed above will be moved via DNS or Fastly CDN pointers. We don’t have an exact schedule as the move will be a fluid “as things get done” style, finishing as quickly as we can. There should be no downtime for Q&A, only a brief period of read-only traffic as we migrate the database and redis roles to Denver (about 8 minutes during the last failover). Other services like API and Talent will have similar behavior. Chat will undergo a brief outage as we flip it over (on the order of minutes).
We will be watching stability throughout the weekend and into next week.
For updates throughout the move, follow @StackStatus on Twitter.