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Let's consign CAP to the cabinet of curiosities
Brewer’s CAP theorem, and Gilbert and Lynch’s formalization of it, is the first introduction to hard trade-offs for many distributed systems engineers. Going by the vast amounts of ink and bile spent on the topic, it is not unreasonable for new folks to conclude that it’s an important, foundational, idea.
It’s much closer to relevant for developers of intermittently connected mobile and IoT applications, and space where the trade-off is typically seen as common sense already. Six are on the majority (quorum 1) side, and are smiling because they can enjoy both availability and strong consistency (provided the system doesn’t allow the seventh client to write). These tend to be cases where one device, or a small group of them, can be partitioned off from the internet mother ship due to awkward physical situations.
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