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digit millisecond latency requirements for their database queries.
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* These apps have a classic relational data model, and are built using ORMs –
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like RoR, Hibernate, Django etc.
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## Characteristics of real-time operational analytics
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* Common data models in these apps include:
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* Star Schema - few large/fact tables, the rest being small/dimension tables
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* Mostly fewer than 20 major tables
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## Characteristics of high-throughput transactional
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* Query latency in single-digit milliseconds, with a high concurrency
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requirement.
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* Time series data, such as internet of things.
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## Next steps
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