Big Data is all about finding a needle of value in a haystack of unstructured information.Big data refers to large datasets that are challenging to store, search, share, visualize, and analyze.
BigTable is a compressed, high performance, and proprietary data storage system built on Google File System .Big Table is Googles Database used for Google Reader,Google Maps,Google Book Search,My Search History,Google Earth, Blogger.com,Google Code hosting, Orkut,YouTube and Gmail.
BigTable 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
Relational databases (such as Oracle, MySQL, and SQL Server) versus newer non-relational databases (such as MongoDB, CouchDB, BigTable, and others).
Big Data is not just about volume, the approach to analysis contends with data content and structure that cannot be anticipated or predicted.
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