Architecture and performance of server-directed transcoding

Knutsson, Björn; Hong, Li; Mogul, Jeffrey C.; Hopkins, Bryan

doi:10.1145/945846.945850

Cited by 37 publications

(17 citation statements)

References 18 publications

(24 reference statements)

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“…The Web& system [10], Chroma [11], server-directed transcoding [12], and MARCH [13] split application functionality between an endpoint and a network node. Beyond these capabilities, we focus on providing a resource request model and implementing performance isolation in the execution environment.…”

Section: Placing Code "In" the Networkmentioning

confidence: 99%

Java active extensions: Scalable middleware for performance-isolated remote execution

Newhouse

Pasquale

2005

Computer Communications

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We present the design and implementation of a highly scalable and easily deployed middleware system that provides performance-isolated execution environments for client and server application functionality. The Java Active Extensions system allows clients or servers to "extend" their operation by hosting portions of their codes, called extensions, at network vantage points for improved performance and reliability, and by providing them with qualities of service in the form of rate-based resource reservations. This is especially useful for wireless resource-limited clients, which can remotely locate filters, caches, monitors, buffers, etc., to act on their behalf and improve interactions with servers. Servers also benefit by moving some of their services close to their clients (e.g., those near a common base station) to reduce latency and improve bandwidth. In both cases, the client's or server's extended functionality executes with a specified fraction of the (remote) system's processor. The system design is based on a scalable distributed architecture that allows for incremental hardware growth, and is highly deployable as it runs entirely at user level, including its rate-based scheduling system.

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Section: Placing Code "In" the Networkmentioning

confidence: 99%

Java active extensions: Scalable middleware for performance-isolated remote execution

Newhouse

Pasquale

2005

Computer Communications

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“…As a consequence, in this paper we do not rely on privileged accesses to content provider information for the deployment of the adaptation service, including metadata and already adapted resources. Moreover, we do not exploit mechanisms such as server-directed adaptation [18], that allows the content provider to give directives to guide the transcoding choices. However, our prototype can be easily modified to support the solution of an intermediary infrastructure that operates in collaboration with the content provider, as in the case of Content Delivery Networks.…”

Section: Introductionmentioning

confidence: 99%

Content Adaptation Architectures Based on Squid Proxy Server

2005

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The overwhelming popularity of Internet and the technology advancements have determined the diffusion of many different Web-enabled devices. In such an heterogeneous client environment, efficient content adaptation and delivery services are becoming a major requirement for the new Internet service infrastructure. In this paper we describe intermediary-based architectures that provide adaptation and delivery of Web content to different user terminals. We present the design of a Squid-based prototype that carries out the adaptation of Web images and combines such a functionality with the caching of multiple versions of the same resource. We also investigate how to provide some form of cooperation among the nodes of the intermediary infrastructure, with the goal to evaluate to what extent the cooperation in discovering, adapting, and delivering Web resources can improve the user-perceived performance.

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“…More sophisticated policies have been discussed in [6,17]. Moreover, we do not address issues related to end-to-end content semantics, such as those considered by server-directed transcoding [11]. Cooperative architectures for transcoding and caching can be integrated with content server decisions or not, without altering our performance considerations.…”

Section: Edge Server Cooperative Transcodingmentioning

confidence: 99%

Cooperative Architectures and Algorithms for Discovery and Transcoding of Multi-Version Content

Canali

Cardellini

Colajanni

et al.

Web Content Caching and Distribution

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A clear trend of the Web is that a variety of new consumer devices with diverse computing powers, display capabilities, and wired/wireless network connections is gaining access to the Internet. Tailoring Web content to match the device characteristics requires functionalities for content transformation, namely transcoding, that are typically carried out by the content Web server or by an edge proxy server. In this paper, we explore how to improve the user response time by considering systems of cooperative edge servers which collaborate in discovering, transcoding, and delivering multiple versions of Web objects. The transcoding functionality opens an entirely new space of investigation in the research area of distributed cache cooperation, because it transforms the proxy servers from content repositories along the client-server path into pro-active network elements providing computation and adaptive delivery. We propose and investigate different algorithms for cooperative discovery, delivery, and transcoding in the context of edge servers organized in hierarchical and flat peer-to-peer topologies. We compare the performance of the proposed schemes through ColTrES (Collaborative Transcoder Edge Services), a flexible prototype testbed that implements all considered mechanisms.

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Architecture and performance of server-directed transcoding

Cited by 37 publications

References 18 publications

Java active extensions: Scalable middleware for performance-isolated remote execution

Java active extensions: Scalable middleware for performance-isolated remote execution

Content Adaptation Architectures Based on Squid Proxy Server

Cooperative Architectures and Algorithms for Discovery and Transcoding of Multi-Version Content

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