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Facebook makes use of many technologies and may use NoSQL also. &nbsp;But they do make use of a lot of MySQL database servers and Hadoop Distributed File System. &nbsp;Facebook Engineering tells a lot about how they use technologies. &nbsp;<a href="https://www.facebook.com/Engineering" rel="ugc">https://www.facebook.com/Engineering</a>
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Facebook makes use of many technologies and may use NoSQL also.  But they do make use of a lot of MySQL database servers and Hadoop Distributed File System.  Facebook Engineering tells a lot about how they use technologies.  https://www.facebook.com/Engineering [https://www.facebook.com/Engineering]

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All ,<br />
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Will it be advisable to store user specific data i.e authentication, authorization , audit trial information , his preference etc in a No-SQL Database. One of the primary concerns is that since it does not have referential integrity the data integrity art could be affected... <br />
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I understand that Applications like Facebook uses NoSQL Database
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All ,

Will it be advisable to store user specific data i.e authentication, authorization , audit trial information , his preference etc in a No-SQL Database. One of the primary concerns is that since it does not have referential integrity the data integrity art could be affected... 

I understand that Applications like Facebook uses NoSQL Database

Storing user specific data in NoSQL Database

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