This is background research into the marketplace for analytics tools.

For the purpose of this article, an analytics tool is one that doesn't create data; but does cache it, and supply the ability to summarise, regress the data, perform trend analysis etc in a variety of fashions, graphical and numerical. Technically the caching step can be skipped is there enough I/O performance; but most systems do cache to be ale to organise the data better for reading.

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