Hi , I am evaluating LDAP in general (Apache DS as possible LDAP) for use as a user repository to be used for authentication /authorization for a large scale web application.
The choice is RDBMS vs LDAP vs NoSQL. I am well aware that LDAP is used by large enterprises. These enterprises have typically thousands of users. But have not seen it referenced in large scale web application architectures - such as those at google , facebook, linkedin which deal with millions of users. ( They might be using ldap but I have not seen anything on the web that says they do) Can LDAP in general and Apache DS in particular scale to millions of users ? Are there any blogs/articles on web that talk of LDAP use in architectures of very large scale. thanks -- http://khangaonkar.blogspot.com/
