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Something I'd like to know, if you're moving off AWS and using your own raspberry pi cluster, what would you do to provide a performant MySQL DB for example? I can't imagine that trying to run a high performance mysql instance on a PI makes sense. So would you still want an old-school rack server with RAID and all the rest to be your DB server?

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Ask yourself, why do you need a MySQL DB in the first place? If the service can get away with sqlite, use that. Alternatively, there is also rqlite (and I think another similar project) that allows for sqlite to be HA.

rqlite author here, happy to answer any questions about it.

https://github.com/rqlite/rqlite

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