<i>The</i>UNIX<i>System</i>: A Stream Input-Output System

Ritchie, Dennis M.

doi:10.1002/j.1538-7305.1984.tb00071.x

Cited by 151 publications

(76 citation statements)

References 3 publications

(1 reference statement)

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“…The filters presented here closely resemble the "stream modules" described in [5]. While some of the concepts and even the interface are in principle similar, the issues of relocatability and automatic propagation cause special concerns.…”

Section: Operating System Issuesmentioning

confidence: 97%

Filter propagation in dissemination trees: Trading off bandwidth and processing in continuous media networks

Pasquale

Polyzos

Anderson

et al. 1994

Network and Operating System Support for Digital Audio and Video

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We describe the concept of the relocatable continuous media filter. The novelty of these filters is how they can propagate over a dissemination tree in a network. We describe the filter propagation protocol to achieve this. Execution of filters inside a network allows the network to be viewed in a novel way, as a '+processor" with its "'instruction set" being the various types of available filters. Since filters generally modify the data rate of the continuous media stream, usually (but not necessarily) reducing it, filters allow the trading off of bandwidth and processing in a network. MotivationHigh performance workstations and high capacity networks have become enabling technologies for distributed continuous media (CM) applications. For example, videoconferencing and remote video services will be popular for business and home users, while visualization of animations of remotely-located scientific data sets will be popular for scientific users.While the networks of the near future will offer gigabit per second and higher bandwidths, we believe there will always be a need for more bandwidth given the current trends toward videoconferencing, hundreds of channels offered by cable television providers, as well as the desire for user-selectable on-demand "pay-per-view" home movies. These video applications are highly I/O-intensive; for example, the data rate for a single

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Section: Operating System Issuesmentioning

confidence: 97%

Filter propagation in dissemination trees: Trading off bandwidth and processing in continuous media networks

Pasquale

Polyzos

Anderson

et al. 1994

Network and Operating System Support for Digital Audio and Video

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“…The x-Kernel, first proposed in the late 80s, provided mechanisms to statically stack network protocols in this way [HP91]. Similarly, the STREAMS abstraction, proposed even earlier, allowed protocol stacks to be composed dynamically [Rit84]. This work was influenced by all such approaches and in particular, as mentioned earlier, by the Click software router.…”

Section: Channelsmentioning

confidence: 99%

The OKE Corral: Code Organisation and Reconfiguration at Runtime Using Active Linking

Bos

Samwel

2002

Active Networks

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Abstract. The OKE Corral is an active network environment which allows third-party active code to configure an active node's code organisation at any level, including the kernel. Using the safety properties of an open kernel environment and a simple 'Click-like' software model, third parties are able to load native code anywhere in the processing hierarchy and connect it to existing components at runtime.

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“…Much like the UNIX System V Streams framework [8] allows new device drivers to be added into an OS kernel transparently, pluggable protocols allow application developers to use different transport mechanisms in an ORB without having to modify its internal implementation directly. Section 3.4 describes pluggable protocol meta-programming mechanisms.…”

Section: The Dynamic Skeleton Interface (Dsi)mentioning

confidence: 99%