[Verse 1] In the world of distributed design Where data lives on servers combined Sometimes they talk, sometimes they're apart Consistency models are where we start When Alice writes and Bob wants to read Different guarantees meet different needs [Chorus] Strong is strict, eventual's free Causal keeps the order you see Read-your-writes means you get what you wrote Choose the model that fits your vote Consistency, consistency Pick the right one for your needs [Verse 2] Strong consistency locks it all down Every node waits before writing is found Bank accounts need this iron-clad rule No overdrafts, it's the safest tool But speed takes a hit when perfection's the game Latency rises, performance feels pain [Chorus] Strong is strict, eventual's free Causal keeps the order you see Read-your-writes means you get what you wrote Choose the model that fits your vote Consistency, consistency Pick the right one for your needs [Verse 3] Eventual consistency says "just wait" Updates will spread, though they might be late Social media likes can take their time Shopping carts work with this paradigm High availability, speed you can feel But stale data might make things unreal [Bridge] Causal remembers cause and effect If A causes B, the order's correct Messages threaded, replies stay in line Time flows forward by logical design [Verse 4] Read-your-writes is a personal view What you just wrote comes back to you Your profile changes appear right away But others might see them another day Session consistency for the user's sake Your own updates never feel fake [Chorus] Strong is strict, eventual's free Causal keeps the order you see Read-your-writes means you get what you wrote Choose the model that fits your vote Consistency, consistency Pick the right one for your needs [Outro] Banks need strong, feeds can wait Chats need causal, don't be late Pick your model, design with care Distributed systems everywhere
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