How we migrated a 1TB database from Win to Linux with no downtime
Our helpdesk app, both the SaaS and the self-hosted version - is powered by SQL Server. The SaaS version additionally uses S3 (to store file-attachments), Redis (to persist in-memory cache between deploys and restarts) and other fancy cloud stuff, but there's still one big ass SQL Server database at the heart of it.
And this Christmas we've migrated it to Linux.