The main subject of the article “Inside India’s Aadhar, The World’s Biggest Biometrics Database” published on TechCrunch is about possible information leaks, privacy issues, etc.. But I have found some interesting bits about the databases used towards its end:
Sudhir Narayana, assistant director general at Aadhar’s technology center,
told me that MongoDB was among several database products, apart from MySQL,
Hadoop and HBase, originally procured for running the database search.
Unlike MySQL, which could only store demographic data, MongoDB was able to
That’s the warning sign right there. You can already see what follows:
However, Aadhar has been slowly shifting most of its database related work
to MySQL, after realizing that MongoDB was not being able to cope with
massive chunks of data, millions of packets.
✚ You can see more details about Aadhaar’s complex database architecture in Big Data at Aadhaar With Hadoop, HBase, MongoDB, MySQL, and Solr
Original title and link: From MySQL to MongoDB and back - The world’s biggest biometrics database