Practical File System Design

Part of the design is reminiscience of a file system. It store's web pages instead of files. And there are attributes like URL and title that is indexed and searchable. I just found Dominic Giampaolo's book "Practical File System Design with the Be File System" available online (http://www.nobius.org/~dbg/practical-file-system-design.pdf). This seems to be a good study on this subject.