DocumentCode :
1867572
Title :
Load balancing in dynamic structured P2P systems
Author :
Godfrey, Brighten ; Lakshminarayanan, Karthik ; Surana, Sonesh ; Karp, Richard ; Stoica, Ion
Volume :
4
fYear :
2004
fDate :
7-11 March 2004
Firstpage :
2253
Abstract :
Most P2P systems that provide a DHT abstraction distribute objects randomly among "peer nodes" in a way that results in some nodes having θ(log N) times as many objects as the average node. Further imbalance may result due to non-uniform distribution of objects in the identifier space and a high degree of heterogeneity in object loads and node capacities. Additionally, a node\´s load may vary greatly over time since the system can be expected to experience continuous insertions and deletions of objects, skewed object arrival patterns, and continuous arrival and departure of nodes. We propose an algorithm for load balancing in such heterogeneous, dynamic P2P systems. Our simulation results show that in the face of rapid arrivals and departures of objects of widely varying load, our algorithm achieves load balancing for system utilizations as high as 90% while moving only about 8% of the load that arrives into the system. Similarly, in a dynamic system where nodes arrive and depart, our algorithm moves less than 60% of the load the underlying DHT moves due to node arrivals and departures. Finally, we show that our distributed algorithm performs only negligibly worse than a similar centralized algorithm, and that node heterogeneity helps, not hurts, the scalability of our algorithm.
Keywords :
distributed algorithms; peer-to-peer computing; resource allocation; DHT abstraction; distributed hash table; dynamic structured P2P system; load balancing; skewed object arrival pattern; Bandwidth; Databases; Distributed algorithms; Intrusion detection; Load management; Peer to peer computing; Routing; Scalability; Sorting;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
INFOCOM 2004. Twenty-third AnnualJoint Conference of the IEEE Computer and Communications Societies
ISSN :
0743-166X
Print_ISBN :
0-7803-8355-9
Type :
conf
DOI :
10.1109/INFCOM.2004.1354648
Filename :
1354648
Link To Document :
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