PROPOSING MULTISPACE DIRECTORY (MSD) OVER TREE DIRECTORY

Most traditional directory systems use tree structure. This structure has revealed some problems, especially in a large system domain like d istributed networking environment. These problems are severe constrain ts on object naming, no support to automatic sharing, and single name space. We proposed a new directory structure called MSD (Multi-Space D irectory) to solve these problems. MSD exhibits several outstanding ch aracteristics over tree directory, such as supporting both hierarchica l and orthogonal classifications, supporting both vertical and horizon tal automatic sharings, providing multiple working environment, and pr oviding a better mechanism for protection and consistency. This paper first analyzed the problems of tree directory and new requirements for directory systems, then describes the structure of MSD in detail and shows its merits over tree directory.