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Why would you delete the MongoDB's so soon after the migration? What if things look great for a few hours/days, but then things go horribly wrong? I suppose t
by indigodaddy 8y ago
Why would you delete the MongoDB's so soon after the migration? What if things look great for a few hours/days, but then things go horribly wrong? I suppose they still had Mongo backups too? Just unsure why you wouldn't leave those around for awhile.
- kstrauser 8y agoGuessing: - They'd been running the two systems in parallel and comparing their outputs for months. By the time the pulled the plug, they were confident that PostgreSQL was working fine. - They had written systems to copy data from the MonogoDB-backed service to the one running on PostgreSQL. Once they started treating PostgreSQL as the official store of record, they'd be faced with either writing another system to mirror PostgreSQL back to MongoDB or committing to lots of double entry. Either of those sound painful.
- manigandham 8y agoThe whole migration took almost a year, looks like they've had enough testing.