Storing user specific data in NoSQL Database

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
sabarish2uAsked:
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Dave BaldwinFixer of ProblemsCommented:
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
tbsgadiCommented:
Here's a good article that explains the benefits of NOSQL:

http://www.mongodb.com/nosql-explained

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