Abstract: A file management system has a disk access unit for converting the relative position of a block in a file system into a physical position and accessing data at the position on a disk. The file management system includes a file entity operation unit, a file system manager access unit, and a file management table access unit. The file entity operation unit updates free block data in the file system when creating and deleting a file entity. The file system manager access unit lets the file entity operation unit work with no regard to the medium structure of a file system manager of the file system. The file management table access unit has an entry operation unit for allocating and releasing file management table entries and an entry access unit for referring to and updating the contents of the file management table entries. The entry access unit has a function of extracting soft link data out of any one of the file management table entries.

Abstract: In a system for establishing a communication path between one global server and a plurality of local servers and transmitting a request for processing a message through the communication path in a closely coupled computer system, the system includes, a first capability which is issued from the global server or the local server to an arbitrary client to receive the request transmitted from the arbitrary client, a second capability which is issued from the global server or local server to a specified server to establish the communication path ensuring security of the message from the specified server, and a message communication unit for transmitting the message between the global server and the local server by using the first and second capability. The system also includes a destination intermediation unit for registering the first capability and informing the first capability to the local server to intermediate the communication between the global server and the local server.