https://en.wikipedia.org/wiki/Bigtable https://en.wikipedia.org/wiki/Bigtable "Bigtable development began in 2004[3] and is now used by a number of Google appl

https://en.wikipedia.org/wiki/Bigtable https://en.wikipedia.org/wiki/Bigtable "Bigtable development began in 2004[3] and is now used by a number of Google applications, such as web indexing,[4] MapReduce, which is often used for generating and modifying data stored in Bigtable,[5] Google Maps,[6] Google Book Search, "My Search History", Google Earth, Blogger.com, Google Code hosting, YouTube,[7] and Gmail.[8]" "Bigtable is one of the prototypical examples of a wide column store. It maps two arbitrary string values (row key and column key) and timestamp (hence three-dimensional mapping) into an associated arbitrary byte array. It is not a relational database and can be better defined as a sparse, distributed multi-dimensional sorted map."