As Moore's Law predicts, we continue to increase the capacity of computer systems and reduce their cost, and so new processing techniques become possible that only a few years ago would have seemed out of reach. One of these techniques is the in-memory database: Instead of using slow disks or relatively slow SSDs to store data, we can keep it in memory for high performance. One such in-memory database, MemSQL, is making waves because it is horizontally scalable across a cluster and provides a familiar SQL-based query language. MemSQL also connects to Spark for analytics against real-time data, rather than stale data in a warehouse.
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