Performance Evaluation of SPDY over High Latency Satellite Channels

Cardaci, Andrea; Caviglione, Luca; Gotta, Alberto; Tonellotto, Nicola

doi:10.1007/978-3-319-02762-3_11

Cited by 21 publications

(16 citation statements)

References 7 publications

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“…More recent studies [22], [26], [29], [6], [9] reported that SPDY provides minimal improvement, if any, over HTTP. Such gain was found to increase for high latency connections [29], [6], but is also reported to be lost over 3G networks due to the interplay between different layers (browser, TCP, cellular network) [9]. All these studies, however, were carried out either via a SPDY/HTTP proxy between client and server or on a single-server setup which offers no insight into the effect of infrastructure parameters.…”

Section: B Related Studiesmentioning

confidence: 99%

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Can SPDY really make the web faster?

Elkhatib

Tyson

Welzl

2014

2014 IFIP Networking Conference

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Abstract-HTTP is a successful Internet technology on top of which a lot of the web resides. However, limitations with its current specification have encouraged some to look for the next generation of HTTP. In SPDY, Google has come up with such a proposal that has growing community acceptance, especially after being adopted by the IETF HTTPbis-WG as the basis for HTTP/2.0. SPDY has the potential to greatly improve web experience with little deployment overhead, but we still lack an understanding of its true potential in different environments. This paper offers a comprehensive evaluation of SPDY's performance using extensive experiments. We identify the impact of network characteristics and website infrastructure on SPDY's potential page loading benefits, finding that these factors are decisive for an optimal SPDY deployment strategy. Through exploring such key aspects that affect SPDY, and accordingly HTTP/2.0, we feed into the wider debate regarding the impact of future protocols.

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Section: B Related Studiesmentioning

confidence: 99%

“…We fix RTT at 150ms and BW at 1Mbps, varying packet loss using the Linux kernel firewall with a stochastic proportional packet processing rule between 0 and 3% 6 . Figure 6 presents the results.…”

Section: Packet Loss Ratiomentioning

confidence: 99%

Can SPDY really make the web faster?

Elkhatib

Tyson

Welzl

2014

2014 IFIP Networking Conference

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“…SPDY is more affected by it due to the use of a single connection. Cardaci et al [13] evaluated SPDY over high latency satellite channels and found it to be performing marginally better than HTTP.…”

Section: Performance Evaluation Of Web Protocolsmentioning

confidence: 99%

Web servers energy efficiency under HTTP/2

Sapra

Hindle

2016

Preprint

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Server energy consumption has been a subject of research for more than a decade now. With Internet scaling rapidly all over the world, more servers are being added continuously. With global warming and financial cost associated with running servers, it has now become a more pressing concern to optimize the power consumption of these servers while still not affecting the performance. The optimization that can be carried out at the hardware level has its limits and therefore the onus comes on to the software developers as well to optimize their web interacting services and use protocols that are more efficient. Recently, Internet Engineering Task Force (IETF) formalized the specification for the successor of HTTP/1.1 protocol. Named HTTP/2, it has been projected to overcome all the limitations of HTTP/1.1 protocol for which web services developers have to optimize their applications. Understandably, HTTP/2 has been drawing a lot of interest from users, web administrators to big organizations. With HTTP/2 as the future of the Internet communication and servers acting as the backbone of the Internet, we are interested in knowing if HTTP/2 will provide energy efficiency benefits to servers or it will just improve users web experience. In this paper, we evaluate the energy efficiency of two web servers while they communicate over HTTP/1.1 and HTTP/2 protocol. We also investigate how Transport layer security (TLS) affects the power consumption of the servers. In our tests, we have introduced HTTP/2 features one by one so that readers can see for themselves what benefits the HTTP/2 over HTTP/1.1. Our study suggests that multiplexing and Round Trip time (RTT) are the biggest factors helping HTTP/2 achieve its design goals. We conclude that even with huge TLS associated cost with HTTP/2, on high latency networks it can help servers to be more energy efficient while improving their performance as well.

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“…Other studies show that the mere replacement of HTTP by SPDY helps only marginally. Cardaci et al [8] evaluate SPDY over high latency satellite channels. On average, SPDY slightly outperforms HTTP.…”

Section: Http/2mentioning

confidence: 99%

HTTP/2-Based Methods to Improve the Live Experience of Adaptive Streaming

Huysegems¹,

Hooft

Bostoen³

et al. 2015

Proceedings of the 23rd ACM International Conference on Multimedia

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HTTP Adaptive Streaming (HAS) is today the number one video technology for over-the-top video distribution. In HAS, video content is temporally divided into multiple segments and encoded at different quality levels. A client selects and retrieves per segment the most suited quality version to create a seamless playout. Despite the ability of HAS to deal with changing network conditions, HAS-based live streaming often suffers from freezes in the playout due to buffer under-run, low average quality, large camera-to-display delay, and large initial/channel-change delay. Recently, IETF has standardized HTTP/2, a new version of the HTTP protocol that provides new features for reducing the page load time in Web browsing. In this paper, we present ten novel HTTP/2-based methods to improve the quality of experience of HAS. Our main contribution is the design and evaluation of a push-based approach for live streaming in which super-short segments are pushed from server to client as soon as they become available. We show that with an RTT of 300 ms, this approach can reduce the average server-todisplay delay by 90.1 % and the average start-up delay by 40.1 %.

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Performance Evaluation of SPDY over High Latency Satellite Channels

Cited by 21 publications

References 7 publications

Can SPDY really make the web faster?

Can SPDY really make the web faster?

Web servers energy efficiency under HTTP/2

HTTP/2-Based Methods to Improve the Live Experience of Adaptive Streaming

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