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Displaying 1-20 out of 20 total
Detection and Root Cause Analysis of Memory-Related Software Aging Defects by Automated Tests
Found in: 2013 IEEE 21st International Symposium on Modelling, Analysis & Simulation of Computer and Telecommunication Systems (MASCOTS)
By Felix Langner,Artur Andrzejak
Issue Date:August 2013
pp. 365-369
Memory-related software defects manifest after a long incubation time and are usually discovered in a production scenario. As a consequence, this frequently encountered class of so-called software aging problems incur severe follow-up costs, including perf...
 
EC2BargainHunter: It's Easy to Hunt for Cost Savings on Amazon EC2!
Found in: 2013 IEEE World Congress on Services (SERVICES)
By Rajaraman Kanagasabai,Le Duy Ngan,Yuzhang Feng,Anitha Veeramani,Joel Koo Chong En,Chan Chee Keong,Flora S. Tsai,Artur Andrzejak
Issue Date:June 2013
pp. 480-487
Return on investment is a critical decision factor for end-users going for cloud deployments. However, major cloud vendors typically provide a myriad of interdependent cloud service options in a variety of purchasing models, that severely complicates cost ...
 
Parallel Concept Drift Detection with Online Map-Reduce
Found in: 2012 IEEE 12th International Conference on Data Mining Workshops
By Artur Andrzejak,Joao Bartolo Gomes
Issue Date:December 2012
pp. 402-407
Empirical evidence shows that massive data sets have rarely (if ever) a stationary underlying distribution. To obtain meaningful classification models, partitioning data into different concepts is required as an inherent part of learning. However, existing...
 
Monetary Cost-Aware Checkpointing and Migration on Amazon Cloud Spot Instances
Found in: IEEE Transactions on Services Computing
By Sangho Yi,Artur Andrzejak,Derrick Kondo
Issue Date:September 2012
pp. 512-524
Recently introduced spot instances in the Amazon Elastic Compute Cloud (EC2) offer low resource costs in exchange for reduced reliability; these instances can be revoked abruptly due to price and demand fluctuations. Mechanisms and tools that deal with the...
 
Generic Self-Healing via Rejuvenation: Challenges, Status Quo, and Solutions
Found in: Self-Adaptive and Self-Organizing Systems Workshops, IEEE International Conference on
By Artur Andrzejak
Issue Date:September 2010
pp. 239-242
Software rejuvenation - in its simplest form a restart of a component or a program - is an efficient and universal approach for ad hoc healing of certain complex systems such as SOA components, telecommunication systems, and servers in data centers. Despit...
 
Reducing Costs of Spot Instances via Checkpointing in the Amazon Elastic Compute Cloud
Found in: Cloud Computing, IEEE International Conference on
By Sangho Yi, Derrick Kondo, Artur Andrzejak
Issue Date:July 2010
pp. 236-243
Recently introduced spot instances in the Amazon Elastic Compute Cloud (EC2) offer lower resource costs in exchange for reduced reliability; these instances can be revoked abruptly due to price and demand fluctuations. Mechanisms and tools that deal with t...
 
Work in Progress: Building a Distributed Generic Stress Tool for Server Performance and Behavior Analysis
Found in: Autonomic and Autonomous Systems, International Conference on
By Ada Casanovas, Javier Alonso, Jordi Torres, Artur Andrzejak
Issue Date:April 2009
pp. 342-345
One of the primary tools for performance analysis of multi-tier systems are standardized
 
High-available grid services through the use of virtualized clustering
Found in: Grid Computing, IEEE/ACM International Workshop on
By Javier Alonso, Luis Silva, Artur Andrzejak, Paulo Silva, Jordi Torres
Issue Date:September 2007
pp. 34-41
Grid applications comprise several components and web-services that make them highly prone to the occurrence of transient software failures and aging problems. This type of failures often incur in undesired performance levels and unexpected partial crashes...
 
Using Virtualization to Improve Software Rejuvenation
Found in: Network Computing and Applications, IEEE International Symposium on
By Luis Moura Silva, Javier Alonso, Paulo Silva, Jordi Torres, Artur Andrzejak
Issue Date:July 2007
pp. 33-44
In this paper, we present an approach for software rejuvenation based on automated self-healing techniques that can be easily applied to off-the-shelf Application Servers and Internet sites. Software aging and transient failures are detected through contin...
 
Predicting Resource Demand in Dynamic Utility Computing Environments
Found in: Autonomic and Autonomous Systems, International Conference on
By Artur Andrzejak, Sven Graupner, Stefan Plantikow
Issue Date:July 2006
pp. 6
We target the problem of predicting resource usage in situations where the modeling data is scarce, non-stationary, or expensive to obtain. This scenario occurs frequently in computing systems and networks, mostly due to the high dynamicity of the underlyi...
 
FEEDBACKFLOW-An Adaptive Workflow Generator for Systems Management
Found in: Autonomic Computing, International Conference on
By Artur Andrzejak, Ulf Hermann, Akhil Sahai
Issue Date:June 2005
pp. 335-336
FeedbackFlow is a framework that implements a general closed control loop of planning ? execution - result validation--re-planning, and generates workflows. In this article, we evaluate the design of this framework on scenarios taken from resource construc...
   
Building a Large and Efficient Hybrid Peer-to-Peer Internet Caching System
Found in: IEEE Transactions on Knowledge and Data Engineering
By Li Xiao, Xiaodong Zhang, Artur Andrzejak, Songqing Chen
Issue Date:June 2004
pp. 754-769
<p><b>Abstract</b>—Proxy hit ratios tend to decrease as the demand and supply of Web contents are becoming more diverse. By case studies, we quantitatively confirm this trend and observe significant document duplications among a proxy and...
 
Service-Centric Globally Distributed Computing
Found in: IEEE Internet Computing
By Sven Graupner, Vadim Kotov, Artur Andrzejak, Holger Trinks
Issue Date:July 2003
pp. 36-43
<p>Growing complexity and increasing system-deployment, ownership, and operation costs are pushing providers to look for economical, extensible ways to organize and manage large-scale computing in science, technology, and business. Two prominent appr...
 
Memory-Efficient and Fast Enumeration of Global States
Found in: Information Visualisation, International Conference on
By Artur Andrzejak
Issue Date:July 2003
pp. 189
We describe a simple algorithm for level-wise enumeration of the global states of a distributed computation. In addition to fast execution, it requires working memory for only two global states plus a variable amount of memory which permits the trading of ...
 
Visualizing Topology in Self-Organizing Management Overlays
Found in: Information Visualisation, International Conference on
By Sven Graupner, Artur Andrzejak, Vadim Kotov
Issue Date:July 2003
pp. 200
System management in IT organizations faces growing complexity and the need to operate more in ad-hoc, collaborative, cross-domain environments. Management systems today are built for rather small organizations in the order of 10<sup>3</sup> el...
 
Scalable, Efficient Range Queries for Grid Information Services
Found in: Peer-to-Peer Computing, IEEE International Conference on
By Artur Andrzejak, Zhichen Xu
Issue Date:September 2002
pp. 33
<p>Recent Peer-to-Peer (P2P) systems such as Tapestry, Chord or CAN act primarily as a Distributed Hash Table (DHT). A DHT is a data structure for distributed storing of pairs (key, data) which allows fast locating of data when a key is given.</p&...
 
Self-Organizing Control in Plantetary-Scale Computing
Found in: Cluster Computing and the Grid, IEEE International Symposium on
By Artur Andrzejak, Sven Graupner, Vadim Kotov, Holger Trinks
Issue Date:May 2002
pp. 359
The explosion in globally connected devices, computers, and services ultimately evolves into very large-scale, inter-connected systems approaching a new era of planetary-scale computing. The backbone of planetary-scale computing is a global network of data...
 
Decision Model for Cloud Computing under SLA Constraints
Found in: Modeling, Analysis, and Simulation of Computer Systems, International Symposium on
By Artur Andrzejak, Derrick Kondo, Sangho Yi
Issue Date:August 2010
pp. 257-266
With the recent introduction of Spot Instances in the Amazon Elastic Compute Cloud (EC2), users can bid for resources and thus control the balance of reliability versus monetary costs. A critical challenge is to determine bid prices that minimize monetary ...
 
A capacity management service for resource pools
Found in: Proceedings of the 5th international workshop on Software and performance (WOSP '05)
By Artur Andrzejak, Jerry Rolia, Ludmila Cherkasova, Martin Arlitt
Issue Date:July 2005
pp. 229-237
Resource pools are computing environments that offer virtualized access to shared resources. When used effectively they can align the use of capacity with business needs (flexibility), lower infrastructure costs (via resource sharing), and lower operating ...
     
Results on k-sets and j-facets via continuous motion
Found in: Proceedings of the fourteenth annual symposium on Computational geometry (SCG '98)
By Artur Andrzejak, Boris Aronov, Emo Welzl, Raimund Seidel, Sariel Har-Peled
Issue Date:June 1998
pp. 192-199
An interactive visualization of weighted three-dimensional α-hulls is presented for static and dynamic spheres. The α-hull is analytically computed and represented by a triangulated mesh. The entire surface is computed and displayed in real-time ...
     
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