A Layered Approach to File System Development
نویسندگان
چکیده
This paper discusses the stackable layers approach to le system design. With this approach, a le system is constructed from several layers, each implementing one portion of the le system well. Each layer is bounded above and below by an identical interface framework. The symmetry of the interface, coupled with run-time stack deenition, make layer conngura-tion exible and facilitate experimentation and new le system development. Addition of new le system functionality to existing environments often requires changes to current interfaces. To address this issue, stackable layers are joined by an extensible interface. Any layer can add to such an interface; existing layers continue to function without modiication. Stackable architectures beneet from new development techniques. This paper examines development methods unique to stackable systems, and concludes with an analysis of the performance of layered le systems.
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