Handling 2B records for a high-traffic application

I would like to present the journey of switching from MongoDB to hybrid OLTP / OLAP solution (TiDB) for more than 2.2 Billion records I see it as a practical presentation: - laying out the context before (the necessity of change) - available choices and selection criteria - how we did the benchmarking - actual migration of the data - how the systems ran in parallel and how we checked the integrity - and some figures from initial and final benchmarking (actual performance numbers)

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