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The Dynamics of Network Topology

Voicu, Ramiro and Legrand, Iosif and Newman, Harvey and Barczyk, Artur and Grigoras, Costin and Dobre, Ciprian (2011) The Dynamics of Network Topology. Journal of Physics Conference Series, 331 . Art. No. 052033. ISSN 1742-6588 .

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Network monitoring is vital to ensure proper network operation over time, and is tightly integrated with all the data intensive processing tasks used by the LHC experiments. In order to build a coherent set of network management services it is very important to collect in near real-time information about the network topology, the main data flows, traffic volume and the quality of connectivity. A set of dedicated modules were developed in the MonALISA framework to periodically perform network measurements tests between all sites. We developed global services to present in near real-time the entire network topology used by a community. For any LHC experiment such a network topology includes several hundred of routers and tens of Autonomous Systems. Any changes in the global topology are recorded and this information is can be easily correlated with traffic patterns. The evolution in time of global network topology is shown a dedicated GUI. Changes in the global topology at this level occur quite frequently and even small modifications in the connectivity map may significantly affect the network performance. The global topology graphs are correlated with active end to end network performance measurements, done with the Fast Data Transfer application, between all sites. Access to both real-time and historical data, as provided by MonALISA, is also important for developing services able to predict the usage pattern, to aid in efficiently allocating resources globally.

Item Type:Article
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Additional Information: © 2011 Institute of Physics. Published under licence by IOP Publishing Ltd. This work was supported by the Department of Energy and National Science Foundation within the DoE grant No DE-FG02-08ER41559, by the National Science Foundation within the UltraLight grant, contract No PHY-0427110.
Funding AgencyGrant Number
NSF UltraLight GrantPHY-0427110
Department of Energy (DOE)DE-FG02-08ER41559
Subject Keywords:Electronics and devices; Instrumentation and measurement; Optics, quantum optics and lasers; Statistical physics and nonlinear systems
Classification Code:PACS: 07.05.-t; 84.40.Ua; 07.05.Wr; 07.50.Ek; 89.75.Hc; 42.79.Ta
Record Number:CaltechAUTHORS:20120411-084939224
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Official Citation:The Dynamics of Network Topology Ramiro Voicu et al 2011 J. Phys.: Conf. Ser. 331 052033
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:30054
Deposited By: Tony Diaz
Deposited On:11 Apr 2012 16:48
Last Modified:03 Oct 2019 03:47

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