MS NTFS has always used B+trees to index files. A full relational database for a file system is another example of the DB overkill that is common in the indust

MS NTFS has always used B+trees to index files. A full relational database for a file system is another example of the DB overkill that is common in the industry. Teach people to use a hammer and every problem becomes a nail. Apparently, more rational heads at MS eventually prevailed.