J. Padhye and J. Kurose. An empirical study of client interactions with a continuous media courseware server. In Proc. of ACM NOSSDAV, July 1998.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....result in further duplication of message data. Thus storage resources, which include active disk space and their protective back up systems, are needlessly consumed with redundant static data. Wasted Resources Recipients of CM content will often only want to render small fractions of messages [10]. Recipients will question paying for the delivery and storage of entire CM messages when they only render small fractions of messages they receive. Furthermore, in the case of distribution lists, a recipient may not render any of the CM content for certain messages, particularly for messages ....

J. Padhye and J. Kurose. An empirical study of client interactions with a continuous-media course- ware server. In Proceedings of NOSSDAV '98, Cambridge, UK, Jul 1998.

....workloads is crucial to properly designing and provisioning current and future services. Recently, there have been several studies attempting to uncover the multimedia workloads characteristics. However, most of the studies are devoted to the analysis of workloads for educational media servers [1,2,3,12,13,16]. One recentstudy[9]characterizes the workload of a media proxy of a large university. Our paper presents and analyzes the enterprise media server workloads based on the access logs from two different media servers in Hewlett Packard Corporation. Both logs are collected over long period of time ....

....high temporal locality of accesses, the special client browsing pattern showing clients preference to preview the initial portion of the videos, and that rankings of video titles by popularity do not fit a Zipfian distribution. Recent studies on client access to MANIC system audio content [16] and low bit rate videos in the Classroom2000 system [13]provide the analysis of accesses to educational media servers in terms of daily variation in server loads, distribution of media session durations, and some clientinteractivity analysis. Extensive analysis of educational media server ....

J.Padhye, J.Kurose. An Empirical Study of Client Interactions with Continuous-Media Couseware Server. Proc. 8th Int'l. Workshop on Network and Operating System Support for Digital Audio and Video (NOSSDAV 1998.

....to post on servers or to redistribute to lists, requires prior specific permission and or a fee. NOSSDAV 02, May 12 14, 2002, Miami, Florida, USA. Copyright 2002 ACM 1 58113 512 2 02 0005 . 5.00. most of the studies are devoted to the analysis of workloads for educational media servers [1, 2, 3, 10, 11, 14]. One recent study [9] characterizes the workload of a media proxy of a large university. This paper presents and analyzes the enterprise media server workloads based on the access logs from two di erent media servers in Hewlett Packard Corporation. Both logs are collected over long period of time ....

....observed high temporal localityof accesses, the special client browsing pattern showing clients preference to preview the initial portion of the videos, and that rankings of video titles by popularity do not t a Zip an distribution. Recent studies on client access to MANIC system audio content [14] and low bit rate videos in the Classroom2000 system [11] provide the analysis of accesses to educational media servers in terms of daily variation in server loads, distribution of media session durations, and some client interactivity analysis. Extensive analysis of educational media server ....

J.Padhye, J.Kurose. An Empirical Study of Client Interactions with Continuous-Media Couseware Server. In Proc. of the 8th Int'l. Workshop on Network and Operating System Support for Digital Audio and Video, July 1998.

....Multimedia Presentation Techniques In the course of developing our six instructional modules as well as the nationwide movement towards instructional technology, we have explored a wide variety of multimedia presentation techniques. Much of our initial content was presented using the MANIC [3] courseware, developed here at UMASS with NSF support. MANIC uses a Web based format that delivers audio (and limited video) using the Real Media format synchronized to HTML pages for the presentation graphics. Features include the ability to search through the HTML pages as well as highlighting ....

J. Padhye, J. Kurose, "An Empirical Study of Client Interactions with a Continuous-Media Courseware Server", Network and Operating System Support for Digital Audio and Video, 1998.

....and synthetic generation of streaming access workloads of fundamental importance in the evaluation of Internet and streaming delivery systems. Over the last few years, there have been a small number of studies that attempted to characterize streaming media workloads [1] 2] 3] 11] 21] [26]. However, to our knowledge, all these studies targeted pre recorded, stored streams (e.g. news clips, film trailers, educational clips) and none has considered the characterization of live streams (e.g. camera feeds) This paper provides such a characterization for a unique data set capturing ....

....relevant to some aspects of our work) is outside the scope of this paper. Thus, in the remainder of this section, we restrict our coverage of related work to studies of streaming media workload characterization and synthesis. Streaming Media Access Characterization: Several previous studies [26], 18] 2] 11] 3] have characterized workloads of pre recorded media object access primarily from media servers for educational purposes. We summarize these efforts below. Padhye and Kurose [26] studied the patterns of user interactions with a media server in the MANIC system. They ....

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous-media courseware server. In Proceedings of NOSSDAV, June 1998.

....request an object from the beginning and play it without interruption to the end. It is unknown how these techniques scale in a non sequential access environment, in which clients may request the segments of an object. Indeed, recent studies on the characterization of streaming access workloads [34, 25, 12, 4] have revealed that client access is seldom sequential due to frequent client inter activity. While several studies have tried to minimize the bandwidth requirement for non sequential access in Video on Demand servers [5, 31, 32, 1, 11, 35] it is still unknown what are the potentials and ....

....the beginning of an object. After receiving a segment of the object (the ON segment) the client skips a portion of the object (the OFF segment) This process repeats until a request or a jump goes beyond either end of the object. In prior studies that characterized streaming access workloads [34, 4], it has been observed that the distributions of ON segments tend to be heavy tailed. In particular, the Pareto distribution was found to be a close fit. Thus, in our simulations, we generated requests that exhibited such properties. For ON periods, we used a Pareto distribution with parameter # ....

J. Padhye and J. Kurose. An empirical study of client interactions with a continuous-media courseware server. In Proceedings of NOSSDAV, June 1998.

....relevant to some aspects of our work) is outside the scope of this paper. Thus, in the remainder of this section, we restrict our coverage of related work to studies of streaming media workload characterization and synthesis. Streaming Media Access Characterization: Several previous studies [26, 18, 2, 11, 3], have characterized workloads of prerecorded media object access primarily from media servers for educational purposes. We summarize these efforts below. Padhye and Kurose [26] studied the patterns of user interactions with a media server in the MANIC system. They characterized session length ....

....characterization and synthesis. Streaming Media Access Characterization: Several previous studies [26, 18, 2, 11, 3] have characterized workloads of prerecorded media object access primarily from media servers for educational purposes. We summarize these efforts below. Padhye and Kurose [26] studied the patterns of user interactions with a media server in the MANIC system. They characterized session length and user activity within a session. A session was considered a sequence of alternating ON periods (when the user is retrieving the media) and OFF periods (when no media is being ....

J. Padhye and J. Kurose. An empirical study of client interactions with a continuous-media courseware server. In Proceedings of NOSSDAV, June 1998.

....when swapping is disabled, as well as when type D2 thresholding is employed. We resort to simulation to explore these remaining cases. As before, we assume arrivals are described by a Poisson process. Service times are described by a lognormal distribution, as has been observed in practice by [1, 30, 31, 32]. The probability density function of the lognormal distribution is defined as f lognormal (x) x p 2 exp( log(x) 2 ) where log(x) is the natural logarithmic function and and are the standard parameters used within the lognormal distribution. We used the mean and ....

J. Padhye and J. Kurose, "An empirical study of client interactions with a continuous-media courseware server," IEEE Internet Computing, Apr. 1999.

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J. Padhye, J. Kurose, "An Empirical Study of Client Interactions with a ContinuousMedia Courseware Server", Proc of Network and Operating System Support for Digital Audio and Video, 1998.

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Padhye, J., and Kurose, J., "An Empirical Study of Client Interactions with a Continuous-Media Courseware Server," Proceedings of NOSSDAV '98, Cambridge, UK, July 1998.

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J. Padhye, J. Kurose, "An Empirical Study of Client Interactions with a Continuous-Media Courseware Server",Proc of Network and Operating System Support for Digital Audio and Video, 1998.

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous media courseware server. In Proc. of ACM NOSSDAV, July 1998.

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous media courseware server. In Proc. of ACM Workshop on Network and Operating System Support for Digital Audio and Video (NOSSDAV), July 1998.

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous media courseware server. In Proc. of ACM NOSSDAV, July 1998.

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous-media courseware server. In Proceedings of International Workshop on Network and Operating System Support for Digital Audio and Video (NOSSDAV), June 1998.

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous-media courseware server. In Proceedings of NOSSDAV, June 1998.

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous-media courseware server. In Proceedings of NOSSDAV, June 1998.

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J. Padhye and J. Kurose. An Empirical Study of Client Interactions with a Continuous-Media Courseware Server. In Proc. NOSSDAV, Cambridge, UK, July 1998.

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous media courseware server. In Proc. of ACM Workshop on Network and Operating System Support for Digital Audio and Video (NOSSDAV), July 1998.

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous media courseware server. In Proc. of ACM Workshop on Network and Operating System Support for Digital Audio and Video (NOSSDAV), July 1998.

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous-media courseware server. In Proceedings of NOSSDAV, June 1998.

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J. Padhye and J. Kurose. An Empirical Study of Client Interactions with a Continuous-Media Courseware Server. In Proc. NOSSDAV, Cambridge, UK, July 1998.

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Jitendra Padhye and Jim Kurose. An Empirical Study of Client Interactions with a Continuous-Media Courseware Server. In Proceedings of NOSSDAV, June 1998.

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J. Padhye and J. Kurose. An Empirical Study of Client Interactions with a Continuous-Media Courseware Server. In Proceedings of NOSSDAV, June 1998.

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J. Padhye and J. Kurose. An empirical study of client interactions with a continuous-media courseware server. In Proc. Inter. Workshop on Network and Operating System Support for Digital Audio and Video, 1998.

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