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Dynamic Extent-Based Allocation Technique for Multimedia File Systems. A Memory Allocator's Approach

Автор:   Stanislav S.
мягкая обложка
204 страниц
2009 год
Издательство:   Книга по Требованию
Цена:
3188 руб
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Описание:The design is tested in a simulation, where a trace of allocation and deallocation events from a content server was submitted to the allocator. To facilitate fastest possible transfer of a file, it must be read sequentially. The design was implemented and the results we obtained in the course of simulation, show that we managed to achieve these goals, creating an allocator that displays properties, favourable for contiguous file placement, while keeping space wastage at its minimum. The bottleneck for content retrieval often lies on data transfer rates of the hard disks used in the server. This thesis investigates the efficiency of extent-based allocator design to satisfy file allocation requests in a CDN proxy cache. Our allocator design tries to achieve both mutually exclusive goals. The allocator is based on the method inspired by the memory allocators, where free space is managed in chunks of varying size, or extents. At the same time, given the large quantity of files, space wastage due to incomplete utilisation of large allocation units is not desirable.


Orthomol Immun Junior Сила иммунитета на страже Вашего ребенка

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Distributed operating systems

The security service allows clients and servers to authenticate each other and perform authenticated RPC. The heart of the security system is a way for clients to be authenticated and receive PACs without having their passwords appear on the network, not even in encrypted form. PACs allow clients to prove who they are in a convenient and foolproof way. Finally, the distributed file system provides a single, system-wide name space for all files. A global file name consists of a cell name followed by a local name. The DCE file system consists (optionally) of the DCE local file system, Episode, plus the file exporter, which makes all the local file systems visible throughout the system. Files are cached using a token scheme that maintains the traditional single-system file semantics. Although DCE provides many facilities and tools, it is not complete and probably never will be. Some areas in which more work is needed are specification and design techniques and tools, debugging aids, runtime management, object orientation, atomic transactions, and multimedia support. PROBLEMS 1. A university is installing DCE on all computers on campus ...»

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Молокоотсос ручной "Avent" с контейнерами для хранения молока.
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Раздел: Без наполнения


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