scholarly journals An Efficient Control Mechanism for Self-Organizing Overlay Networks of Large-Scale P2P Systems

2007 ◽  
Vol 13 (2) ◽  
pp. 227-237 ◽  
Author(s):  
Hiroaki KOBAYASHI ◽  
Hiroyuki TAKIZAWA ◽  
Takuro OKAWA ◽  
Tsutomu INABA
Keyword(s):  
Large Scale ◽  
Overlay Networks ◽  
Control Mechanism ◽  
P2p Systems ◽  
Efficient Control ◽  
Self Organizing

Methods for Performance Improvement of Kademlia-based Overlay Networks (Methoden zur Leistungsverbesserung eines Kademlia-basierten Overlay-Netzes)

2007 ◽  
Vol 49 (5) ◽  
Author(s):  
Andreas Binzenhöfer ◽  
Phuoc Tran-Gia ◽  
Holger Schnabel
Keyword(s):  
Performance Improvement ◽  
Large Scale ◽  
Overlay Networks ◽  
P2p Networks ◽  
P2p Systems ◽  
Business Applications ◽  
Open Questions ◽  
The Stability ◽  
Large Scale Simulations ◽  
Unstable States

SummaryStructured peer-to-peer (p2p) networks are highly distributed systems with a potential to support business applications. There are numerous different suggestions on how to implement such systems. However, before legal p2p systems can become mainstream they need to offer improved efficiency, robustness, and stability. While Chord is the most researched and best understood mechanism, the Kademlia algorithm is widely-used in deployed applications. There are still many open questions concerning the performance of the latter. In this paper we identify the main problems of Kademlia by large scale simulations and present modifications which help to avoid those problems. This way, we are able to significantly improve the performance and robustness of Kademlia-based applications, especially in times of churn and in unstable states. In particular, we show how to increase the stability of the overlay, make searches more efficient, and adapt the maintenance traffic to the current churn rate in a self-organizing way.

Load Balancing in Peer-to-Peer Systems

2010 ◽  
pp. 163-190
Author(s):  
Haiying Shen
Keyword(s):  
Load Balancing ◽  
High Performance ◽  
Large Scale ◽  
Overlay Networks ◽  
Rapid Development ◽  
Peer To Peer ◽  
P2p Systems ◽  
Emerging Trends ◽  
Peer To Peer Systems ◽  
P2p Overlay

Structured peer-to-peer (P2P) overlay networks like Distributed Hash Tables (DHTs) map data items to the network based on a consistent hashing function. Such mapping for data distribution has an inherent load balance problem. Thus, a load balancing mechanism is an indispensable part of a structured P2P overlay network for high performance. The rapid development of P2P systems has posed challenges in load balancing due to their features characterized by large scale, heterogeneity, dynamism, and proximity. An efficient load balancing method should flexible and resilient enough to deal with these characteristics. This chapter will first introduce the P2P systems and the load balancing in P2P systems. It then introduces the current technologies for load balancing in P2P systems, and provides a case study of a dynamism-resilient and proximity-aware load balancing mechanism. Finally, it indicates the future and emerging trends of load balancing, and concludes the chapter.

scholarly journals Geospatial Analysis of Extreme Weather Events in Nigeria (1985–2015) Using Self-Organizing Maps

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Adeoluwa Akande ◽  
Ana Cristina Costa ◽  
Jorge Mateu ◽  
Roberto Henriques
Keyword(s):  
Extreme Precipitation ◽  
Large Scale ◽  
Northern Region ◽  
Extreme Weather Events ◽  
Self Organizing Map ◽  
Spatial And Temporal Patterns ◽  
Self Organizing Maps ◽  
The North ◽  
Precipitation Regimes ◽  
Self Organizing

The explosion of data in the information age has provided an opportunity to explore the possibility of characterizing the climate patterns using data mining techniques. Nigeria has a unique tropical climate with two precipitation regimes: low precipitation in the north leading to aridity and desertification and high precipitation in parts of the southwest and southeast leading to large scale flooding. In this research, four indices have been used to characterize the intensity, frequency, and amount of rainfall over Nigeria. A type of Artificial Neural Network called the self-organizing map has been used to reduce the multiplicity of dimensions and produce four unique zones characterizing extreme precipitation conditions in Nigeria. This approach allowed for the assessment of spatial and temporal patterns in extreme precipitation in the last three decades. Precipitation properties in each cluster are discussed. The cluster closest to the Atlantic has high values of precipitation intensity, frequency, and duration, whereas the cluster closest to the Sahara Desert has low values. A significant increasing trend has been observed in the frequency of rainy days at the center of the northern region of Nigeria.

scholarly journals Self-organizing Clustering: Non-hierarchical Clustering for Large Scale DNA Sequence Data

2007 ◽  
Vol 3 ◽  
pp. 193-197 ◽  
Author(s):  
Kou Amano ◽  
Hiroaki Ichikawa ◽  
Hidemitsu Nakamura ◽  
Hisataka Numa ◽  
Kaoru Fukami-Kobayashi ◽  
...  
Keyword(s):  
Dna Sequence ◽  
Hierarchical Clustering ◽  
Large Scale ◽  
Sequence Data ◽  
Dna Sequence Data ◽  
Self Organizing

A Fully Distributed Method to Detect and Reduce Cut Vertices in Large-Scale Overlay Networks

2012 ◽  
Vol 61 (7) ◽  
pp. 969-985 ◽  
Author(s):  
Xiaomei Liu ◽  
Li Xiao ◽  
Andrew Kreling
Keyword(s):  
Large Scale ◽  
Overlay Networks ◽  
Distributed Method

Spark-GHSOM: Growing Hierarchical Self-Organizing Map for large scale mixed attribute datasets

2019 ◽  
Vol 496 ◽  
pp. 572-591 ◽  
Author(s):  
Ameya Malondkar ◽  
Roberto Corizzo ◽  
Iluju Kiringa ◽  
Michelangelo Ceci ◽  
Nathalie Japkowicz
Keyword(s):  
Large Scale ◽  
Self Organizing Map ◽  
Self Organizing

P2PNet: A Simulation Architecture for Large-scale P2P systems

2007 ◽  
pp. 567-581
Author(s):  
Lechang Cheng ◽  
Norm Hutchinson ◽  
Mabo R. Ito
Keyword(s):  
Large Scale ◽  
P2p Systems

scholarly journals Resource-Aware Cooperative Caching on Mobile Ad-hoc Peer to Peer Networks

2021 ◽  
Author(s):  
Hoda R.K. Nejad
Keyword(s):  
Ad Hoc Networks ◽  
Overlay Networks ◽  
Ad Hoc ◽  
Data Access ◽  
Peer To Peer ◽  
Data Availability ◽  
Cooperative Caching ◽  
P2p Systems ◽  
Hoc Networks ◽  
Resource Aware

With the emergence of wireless devices, service delivery for ad-hoc networks has started to attract a lot of attention recently. Ad-hoc networks provide an attractive solution for networking in the situations where network infrastructure or service subscription is not available. We believe that overlay networks, particularly peer-to-peer (P2P) systems, is a good abstraction for application design and deployment over ad-hoc networks. The principal benefit of this approach is that application states are only maintained by the nodes involved in the application execution and all other nodes only perform networking related functions. On the other hand, data access applications in Ad-hoc networks suffer from restricted resources. In this thesis, we explore how to use Cooperative Caching to improve data access efficiency in Ad-hoc network. We propose a Resource-Aware Cooperative Caching P2P system (RACC) for data access applications in Ad-hoc networks. The objective is to improve data availability by considering energy of each node, demand and supply of network. We evaluated and compared the performance of RACC with Simple Cache, CachePath and CacheData schemes. Our simulation results show that RACC improves the lay of query as well as energy usage of the network as compared to Simple Cache, CachePath and CacheData.

WOW: Self-organizing Wide Area Overlay Networks of Virtual Workstations

2007 ◽  
Vol 5 (2) ◽  
pp. 151-172 ◽  
Author(s):  
A. Ganguly ◽  
A. Agrawal ◽  
P. O. Boykin ◽  
R. J. Figueiredo
Keyword(s):  
Overlay Networks ◽  
Wide Area ◽  
Self Organizing
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