Method and apparatus for translucent file system
June 10, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod to share copy on write segment for mapped files Computer device for aiding in the development of software system Version management system using plural control fields for synchronizing two versions of files in a multiprocessor system System and method for accessing remote files in a distributed networking environment Version management tool Method for concurrent record access, insertion, deletion and alteration using an index tree Single system image uniquely defining an environment for each user in a data processing system Data access system for a file access processor Computer file system Patent #: 5093779 InventorsApplicationNo. 714312 filed on 06/10/1991US Classes:707/101, Manipulating data structure (e.g., compression, compaction, compilation)711/147Shared memory areaExaminersPrimary: Kulik, Paul V.Attorney, Agent or FirmInternational ClassG06F 015/40AbstractIn a computer system having a hierarchical file structure, a file system is provided which permits users of the system to share a file hierarchy and also have a private hierarchy in which files are automatically copied to as they are modified. Through the system of the present invention, a directory appears to the user as a single directory but may actually comprise files originating from a number of directories which are connected to one another through search links. Each directory has a search link associated with it which contains the path name of the back layer or directory behind it. The first layer seen through the system of the present invention is the front layer, private to the user. The back layers behind the front layer and connected to the front layer through the search links are shared layers accessible to multiple users. Thus transparent to the user of the directory accessible comprises multiple layers comprising shared and private files. The system further provides a copy-on-write feature which protects the integrity of the shared files by automatically copying a shared file into the users private layer when the user attempts to modify a shared file in a back layer.Other References
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