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3 comments
Graham Sutherland / Polynomial replied to Viss

@Viss @foone there is some method in the madness. if you've got a lot of transient video data, and you need access to a rolling window of it (either for buffering/stability purposes or for realtime analytics), storing it to disk ends up costing a fortune because you'll end up running headlong into DWPD limits on drives and having to swap them out constantly. but with RAM there's no such wear. for a few hundred concurrent clients you can do it on a single consumer desktop PC worth of RAM.

Graham Sutherland / Polynomial replied to Graham Sutherland / Polynomial

@Viss @foone Redis isn't required to flush to disk (the whole dataset is in-memory) and it supports blob storage, so it's not the worst option. my guess is someone ran the `save` command at some point (or they were doing periodic saves because they didn't separate out nonvolatile data into a separate redis instance) and foone's seeing that last snapshot.

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