If you’re working with large amounts of data, you’ve likely heard about high-cardinality or ran into issues relating to it. It might sound like an intimidating topic if you’re unfamiliar with it, but this article explains what cardinality is and why it crops up often with databases of all types. IoT and monitoring are use cases where high-cardinality is more likely to be a concern. Still, a solid understanding of this concept helps when planning general-purpose database schemas and understanding common factors that can influence database performance.
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