NDLI: Minimizing protocol processing in multimedia servers - implementation and evaluation of network level framing

Content Provider	IEEE Xplore Digital Library
Author	Halvorsen, P. Plagemann, T. Goebel, V.
Copyright Year	2002
Description	Author affiliation: Dept. of Inf., Oslo Univ., Norway (Halvorsen, P.; Plagemann, T.; Goebel, V.)
Abstract	Data servers for multimedia applications like news-on-demand represent a severe bottleneck, because a potentially very high number of users concurrently retrieve data with high data rates. In the Intermediate Storage Node Concept (INSTANCE) project, we develop a new architecture for media-on-demand servers that maximizes the number of concurrent clients a single server can support. Traditional bottlenecks, like copy operations, multiple copies of the same data element in main memory, and checksum calculation in communication protocols are avoided by applying three orthogonal techniques: network level framing (NLF), zero-copy-one-copy memory architecture, and integrated error management. In this paper, we describe how to minimize the transport level protocol processing using NLF. In particular, we look at how NLF is implemented, and we present performance measurements indicating a large performance gain. The protocol execution is minimized to about 450 cycles per packet regardless of packet size, i.e., a reduction of about 87% compared to 1 KB packets and more using larger packets. Consequently, the total server-side processing overhead is decreased by at least 50%.
Sponsorship	IEEE Comput. Soc. Tech. Committee on Distrib. Process. (TCDP)
Starting Page	149
Ending Page	155
File Size	325509
Page Count	7
File Format	PDF
ISBN	0769515886
DOI	10.1109/ICDCSW.2002.1030762
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-07-02
Publisher Place	Austria
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protocols Intelligent networks Network servers Communication system operations and management Application software Error correction Memory management Memory architecture Operating systems Central Processing Unit
Content Type	Text
Resource Type	Article

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