Hielscher KS, German R (2003)
Publication Type: Conference contribution, Conference Contribution
Publication year: 2003
Publisher: Springer-verlag
Edited Volumes: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Series: Lecture Notes in Computer Science
City/Town: Heidelberg
Book Volume: 2794
Pages Range: 11-28
Conference Proceedings Title: Proc. 13th Conf. on Computer Performance Evaluations, Modelling Techniques and Tools
Event location: Urbana, IL, USA
ISBN: 3-540-40814-2
URI: http://www.springerlink.com/link.asp?id=njgh082d155hnqat
We present a software monitoring infrastructure for distributed web servers for precise measurements of one-way delays of TCP packets to parameterize, validate and verify simulation and state-space based models of the system. A frequency synchronization of the clocks is not sufficient, both frequency and phase (offset) of all clocks have to be in sync to correctly estimate distributions of the involved delays. We present a cost-effective combination of standard methods with own additions and improvements to achieve this goal. The solution we developed is based on using only one GPS receiver in combination with NTP and the PPS-API for the time synchronization of all object systems' clocks with a precision in the range of one microsecond. The timestamping and generation of the event trace is done in a Linux kernel module. In addition, example measurements generated with our infrastructure are presented. © Springer-Verlag Berlin Heidelberg 2003.
APA:
Hielscher, K.-S., & German, R. (2003). A Low-Cost Infrastructure for High Precision High Volume Performance Measurements of Web Clusters. In Proc. 13th Conf. on Computer Performance Evaluations, Modelling Techniques and Tools (pp. 11-28). Urbana, IL, USA: Heidelberg: Springer-verlag.
MLA:
Hielscher, Kai-Steffen, and Reinhard German. "A Low-Cost Infrastructure for High Precision High Volume Performance Measurements of Web Clusters." Proceedings of the TOOLS 2003, Urbana, IL, USA Heidelberg: Springer-verlag, 2003. 11-28.
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