We all know ORACLE, MYSQL, SQL SERVER, SYBASE, DB2 technologies, but there are some lesser known and highly efficient (some proprietary )technologies as well and i have tried to compose a small Blog of the same.

Details about the technology can be gained by visiting their site…

CASSANDRA from APACHE (http://cassandra.apache.org/)
This has been used by some parts in Google / FaceBook / Diggit etc..
Read about their efficient technology at their site….

BIGTABLE : Database system from GOOGLE
(http://static.googleusercontent.com/external_content/untrusted_dlcp/labs.google.com/en/us/papers/bigtable-osdi06.pdf)
Google uses this Data Store (database) for Google Earth / Many projects at Google store data in Bigtable, including web indexing, Google Earth, and Google Finance.

DYNAMO from amazon(http://www.allthingsdistributed.com/files/amazon-dynamo-sosp2007.pdf)
Again Amazon runs this efficient E-Commerce Site and the Muscle Behind the Site is the DYNAMO Database..