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Displaying 1-22 out of 22 total
The Social Hourglass: An Infrastructure for Socially Aware Applications and Services
Found in: IEEE Internet Computing
By Adriana Iamnitchi,Jeremy Blackburn,Nicolas Kourtellis
Issue Date:May 2012
pp. 13-23
As the Internet's hourglass architecture connects various resources to various applications, an infrastructure that collects information from various social signals can support an ever-evolving set of socially aware applications and services. Among the pro...
The Small World of File Sharing
Found in: IEEE Transactions on Parallel and Distributed Systems
By Adriana Iamnitchi, Matei Ripeanu, Elizeu Santos-Neto, Ian Foster
Issue Date:July 2011
pp. 1120-1134
Web caches, content distribution networks, peer-to-peer file-sharing networks, distributed file systems, and data grids all have in common that they involve a community of users who use shared data. In each case, overall system performance can be improved ...
P2P Systems Meet Mobile Computing: A Community-Oriented Software Infrastructure for Mobile Social Applications
Found in: Self-Adaptive and Self-Organizing Systems Workshops, IEEE International Conference on
By Cristian Borcea, Adriana Iamnitchi
Issue Date:October 2008
pp. 242-247
The widespread adoption of powerful mobile devices creates an unprecedented potential for innovative mobile applications that can enhance users' social interactions. The current centralized mobile system and service architectures do not allow large-scale d...
The Globus Replica Location Service: Design and Experience
Found in: IEEE Transactions on Parallel and Distributed Systems
By Ann L. Chervenak, Robert Schuler, Matei Ripeanu, Muhammad Ali Amer, Shishir Bharathi, Ian Foster, Adriana Iamnitchi, Carl Kesselman
Issue Date:September 2009
pp. 1260-1272
Distributed computing systems employ replication to improve overall system robustness, scalability, and performance. A Replica Location Service (RLS) offers a mechanism to maintain and provide information about physical locations of replicas. This paper de...
In Search of Simplicity: A Self-Organizing Group Communication Overlay
Found in: Self-Adaptive and Self-Organizing Systems, IEEE International Conference on
By Matei Ripeanu, Adriana Iamnitchi, Ian Foster, Anne Rogers
Issue Date:July 2007
pp. 371-374
<p>Group communication primitives have broad utility as building blocks for distributed applications. The challenge is to create and maintain the distributed structures that support these primitives while accounting for volatile end-nodes and variabl...
Toward a Doctrine of Containment: Grid Hosting with Adaptive Resource Control
Found in: SC Conference
By Lavanya Ramakrishnan, Laura Grit, Adriana Iamnitchi, David Irwin, Aydan Yumerefendi, Jeff Chase
Issue Date:November 2006
pp. 20
Grid computing environments need secure resource control and predictable service quality in order to be sustainable. We propose a grid hosting model in which independent, selfcontained grid deployments run within isolated containers on shared resource prov...
Model-Driven Placement of Compute Tasks and Data in a Networked Utility
Found in: Autonomic Computing, International Conference on
By Piyush Shivam, Adriana Iamnitchi, Aydan R. Yumerefendi, Jeffrey S. Chase
Issue Date:June 2005
pp. 344-345
An important problem in resource management for networked resource-sharing systems is the simultaneous allocation of multiple resources to an application. Self-optimizing systems must co-allocate resources in a way that reconciles competing demands and max...
Giggle: A Framework for Constructing Scalable Replica Location Services
Found in: SC Conference
By Ann Chervenak, Ewa Deelman, Ian Foster, Leanne Guy, Wolfgang Hoschek, Adriana Iamnitchi, Carl Kesselman, Peter Kunszt, Matei Ripeanu, Bob Schwartzkopf, Heinz Stockinger, Kurt Stockinger, Brian Tierney
Issue Date:November 2002
pp. 58
In wide area computing systems, it is often desirable to create remote read-only copies (replicas) of files. Replication can be used to reduce access latency, improve data locality, and/or increase robustness, scalability and performance for distributed ap...
A Peer-to-Peer Approach to Resource Location in Grid Environments
Found in: High-Performance Distributed Computing, International Symposium on
By Adriana Iamnitchi, Ian Foster, Daniel C. Nurmi
Issue Date:July 2002
pp. 419
No summary available.
Improving Data Availability through Dynamic Model-Driven Replication in Large Peer-to-Peer Communities
Found in: Cluster Computing and the Grid, IEEE International Symposium on
By Kavitha Ranganathan, Adriana Iamnitchi, Ian Foster
Issue Date:May 2002
pp. 376
<p>Efficient data sharing in global peer-to-peer systems is complicated by erratic node failure, unreliable network connectivity and limited bandwidth. Replicating data on multiple nodes can improve availability and response time. Yet determining whe...
Mapping the Gnutella Network
Found in: IEEE Internet Computing
By Matei Ripeanu, Adriana Iamnitchi, Ian Foster
Issue Date:January 2002
pp. 50-57
<p>A mismatch between Gnutella's overlay network topology and the Internet infrastructure has critical performance implications.</p>
A Problem-Specific Fault-Tolerance Mechanism for Asynchronous, Distributed Systems
Found in: Parallel Processing, International Conference on
By Adriana Iamnitchi, Ian Foster
Issue Date:August 2000
pp. 4
The idle computers on a local area, campus area, or even wide area network represent a significant computational resource-one that is, however, also unreliable, heterogeneous, and opportunistic. We describe an algorithm that allows branch-and-bound problem...
Leveraging Peer Centrality in the Designof Socially-Informed Peer-to-Peer Systems
Found in: IEEE Transactions on Parallel and Distributed Systems
By Nicolas Kourtellis,Adriana Iamnitchi
Issue Date:September 2014
pp. 2364-2374
Social applications mine user social graphs to improve performance in search, provide recommendations, allow resource sharing and increase data privacy. When such applications are implemented on a peer-to-peer (P2P) architecture, the social graph is distri...
Last call for the buffet: economics of cellular networks
Found in: Proceedings of the 19th annual international conference on Mobile computing & networking (MobiCom '13)
By Adriana Iamnitchi, Jeremy Blackburn, Konstantina Papagiannaki, Rade Stanojevic, Vijay Erramilli
Issue Date:September 2013
pp. 111-122
Voice and data traffic growth over the last several years has become a major challenge for cellular operators with a direct impact on revenues, infrastructure investments, and end-user performance. The economics of these operators depend on various incenti...
Branded with a scarlet "C": cheaters in a gaming social network
Found in: Proceedings of the 21st international conference on World Wide Web (WWW '12)
By Adriana Iamnitchi, Jeremy Blackburn, John Skvoretz, Matei Ripeanu, Xiang Zuo, Nicolas Kourtellis, Ramanuja Simha
Issue Date:April 2012
pp. 81-90
Online gaming is a multi-billion dollar industry that entertains a large, global population. One unfortunate phenomenon, however, poisons the competition and the fun: cheating. The costs of cheating span from industry-supported expenditures to detect and l...
Vulnerability in socially-informed peer-to-peer systems
Found in: Proceedings of the 4th Workshop on Social Network Systems (SNS '11)
By Adriana Iamnitchi, Jeremy Blackburn, Nicolas Kourtellis
Issue Date:April 2011
pp. 1-6
The recent increase in the volume of recorded social interactions has the potential to enable a large class of innovative social applications and services. The decentralized management of such social information as a social graph distributed on a user-cont...
K-path centrality: a new centrality measure in social networks
Found in: Proceedings of the 4th Workshop on Social Network Systems (SNS '11)
By Adriana Iamnitchi, Nicolas Kourtellis, Rahul Tripathi, Ramanuja Simha, Tharaka Alahakoon
Issue Date:April 2011
pp. 1-6
This paper proposes an alternative way to identify nodes with high betweenness centrality. It introduces a new metric, κ-path centrality, and a randomized algorithm for estimating it, and shows empirically that nodes with high κ-path centrality...
On managing social data for enabling socially-aware applications and services
Found in: Proceedings of the 3rd Workshop on Social Network Systems (SNS '10)
By Adriana Iamnitchi, Joshua Finnis, Nicolas Kourtellis, Paul Anderson
Issue Date:April 2010
pp. 1-6
Applications and services that take advantage of social data usually infer social relationships using information produced only within their own context. We propose to combine social information from multiple sources into a directed and weighted social mul...
Individual and social behavior in tagging systems
Found in: Proceedings of the 20th ACM conference on Hypertext and hypermedia (HT '09)
By Adriana Iamnitchi, David Condon, Elizeu Santos-Neto, Matei Ripeanu, Nazareno Andrade
Issue Date:June 2009
pp. 70-73
In tagging systems users can annotate items of interest with free-form terms. A good understanding of usage characteristics of such systems is necessary to improve the design of current and next generation of tagging systems. To this end, this work explore...
Amazon S3 for science grids: a viable solution?
Found in: Proceedings of the 2008 international workshop on Data-aware distributed computing (DADC '08)
By Adriana Iamnitchi, Matei Ripeanu, Mayur R. Palankar, Simson Garfinkel
Issue Date:June 2008
pp. 55-64 has introduced the Simple Storage Service (S3), a commodity-priced storage utility. S3 aims to provide storage as a low-cost, highly available service, with a simple 'pay-as-you-go' charging model. This article makes three contributions. First, ...
Data transfers in the grid: workload analysis of globus GridFTP
Found in: Proceedings of the 2008 international workshop on Data-aware distributed computing (DADC '08)
By Adriana Iamnitchi, Dan Fraser, Gustavo Zarrate, Lydia Prieto, Nicolas Kourtellis
Issue Date:June 2008
pp. 29-38
One of the basic services in grids is the transfer of data between remote machines. Files may be transferred at the explicit request of the user or as part of delegated resource management services, such as data replication or job scheduling. GridFTP is an...
File grouping for scientific data management: lessons from experimenting with real traces
Found in: Proceedings of the 17th international symposium on High performance distributed computing (HPDC '08)
By Adriana Iamnitchi, Shyamala Doraimani
Issue Date:June 2008
pp. 227-269
The analysis of data usage in a large set of real traces from a high-energy physics collaboration revealed the existence of an emergent grouping of files that we coined "filecules". This paper presents the benefits of using this file grouping for prestagin...