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Displaying 1-23 out of 23 total
Business-driven IT Management for Cloud computing providers
Found in: 2012 IEEE 4th International Conference on Cloud Computing Technology and Science (CloudCom)
By J. Oriol Fito,Mario Macias,Ferran Julia,Jordi Guitart
Issue Date:December 2012
pp. 193-200
Nowadays, enterprises have high expectations on Cloud systems to achieve their Business-Level Objectives (BLOs). However, those systems are becoming very complex, thus leading to critical management issues. For these reasons, new self-management strategies...
 
Optimal Resource Allocation in a Virtualized Software Aging Platform with Software Rejuvenation
Found in: Software Reliability Engineering, International Symposium on
By Javier Alonso,Ã?ñigo Goiri,Jordi Guitart,Ricard Gavaldà,Jordi Torres
Issue Date:December 2011
pp. 250-259
Nowadays, virtualized platforms have become the most popular option to deploy complex enough services. The reason is that virtualization allows resource providers to increase resource utilization. Deployed services are expected to be always available, but ...
 
Energy-Aware Scheduling in Virtualized Datacenters
Found in: Cluster Computing, IEEE International Conference on
By Ã?ñigo Goiri, Ferran Julià, Ramón Nou, Josep Ll. Berral, Jordi Guitart, Jordi Torres
Issue Date:September 2010
pp. 58-67
The reduction of energy consumption in large-scale datacenters is being accomplished through an extensive use of virtualization, which enables the consolidation of multiple workloads in a smaller number of machines. Nevertheless, virtualization also incurs...
 
Characterizing Cloud Federation for Enhancing Providers' Profit
Found in: Cloud Computing, IEEE International Conference on
By Ã?ñigo Goiri, Jordi Guitart, Jordi Torres
Issue Date:July 2010
pp. 123-130
Cloud federation has been proposed as a new paradigm that allows providers to avoid the limitation of owning only a restricted amount of resources, which forces them to reject new customers when they have not enough local resources to fulfill their custome...
 
Introducing Virtual Execution Environments for Application Lifecycle Management and SLA-Driven Resource Distribution within Service Providers
Found in: Network Computing and Applications, IEEE International Symposium on
By Iñigo Goiri, Ferran Julià, Jorge Ejarque, Marc de Palol, Rosa M. Badia, Jordi Guitart, Jordi Torres
Issue Date:July 2009
pp. 211-218
Resource management is a key challenge that service providers must adequately face in order to ensure their profitability. This paper describes a proof-of-concept framework for facilitating resource management in service providers, which allows reducing co...
 
SLA-Driven Semantically-Enhanced Dynamic Resource Allocator for Virtualized Service Providers
Found in: eScience, IEEE International Conference on
By Jorge Ejarque, Marc de Palol, Íñigo Goiri, Ferran Julià, Jordi Guitart, Rosa M. Badia, Jordi Torres
Issue Date:December 2008
pp. 8-15
In order to be profitable, service providers must be able to undertake complex management tasks such as provisioning, deployment, execution and adaptation in an autonomic way. This paper introduces a framework, the Semantically-Enhanced Resource Allocator ...
 
Session-Based Adaptive Overload Control for Secure Dynamic Web Applications
Found in: Parallel Processing, International Conference on
By Jordi Guitart, David Carrera, Vincenç Beltran, Jordi Torres, Eduard Ayguadé
Issue Date:June 2005
pp. 341-349
As dynamic web content and security capabilities are becoming popular in current web sites, the performance demand or application servers that host the sites is increasing, leading sometimes these servers to overload. As a result, response times may grow t...
 
Characterizing Secure Dynamic Web Applications Scalability
Found in: Parallel and Distributed Processing Symposium, International
By Jordi Guitart, Vicenç Beltran, David Carrera, Jordi Torres, Eduard Ayguadé
Issue Date:April 2005
pp. 108a
Security in the access to web contents and the interaction with web sites is becoming one of the most important issues in Internet. Servers need to provide certain levels of security so that the user feels comfortable when running the applications that pro...
 
Tuning Dynamic Web Applications using Fine-Grain Analysis
Found in: Parallel, Distributed, and Network-Based Processing, Euromicro Conference on
By Jordi Guitart, David Carrera, Jordi Torres, Eduard Ayguadé, Jesús Labarta
Issue Date:February 2005
pp. 84-91
In this paper we present a methodology to analyze the behavior and performance of Java application servers using a performance analysis framework. This framework considers all levels involved in the application server execution (application, server, virtua...
 
Application/Kernel Cooperation Towards the Efficient Execution of Shared-Memory Parallel Java Codes
Found in: Parallel and Distributed Processing Symposium, International
By Jordi Guitart, Xavier Martorell, Jordi Torres, Eduard Ayguadé
Issue Date:April 2003
pp. 38a
In this paper we propose mechanisms to improve the performance of parallel Java applications executing on multiprogrammed shared-memory multiprocessors. The proposal is based on a dialog between each Java application and the underlying execution environmen...
 
Performance Analysis Tools for Parallel Java Applications on Shared-Memory Systems
Found in: Parallel Processing, International Conference on
By Jordi Guitart, Jordi Torres, Eduard Ayguadé, J. Mark Bull
Issue Date:September 2001
pp. 0357
Abstract: In this paper we describe an instrumentation environment for the performance analysis and visualization of parallel applications written in JOMP, an OpenMP-like interface for Java. The environment includes two complementary approaches. The first ...
 
GreenSlot: scheduling energy consumption in green datacenters
Found in: SC Conference
By Ã?ñigo Goiri,Ryan Beauchea,Kien Le,Thu D. Nguyen,Md. E. Haque,Jordi Guitart,Jordi Torres,Ricardo Bianchini
Issue Date:November 2011
pp. 1-11
In this paper, we propose GreenSlot, a parallel batch job scheduler for a datacenter powered by a photovoltaic solar array and the electrical grid (as a backup). GreenSlot predicts the amount of solar energy that will be available in the near future, and s...
 
Intelligent Placement of Datacenters for Internet Services
Found in: Distributed Computing Systems, International Conference on
By Ã?ñigo Goiri, Kien Le, Jordi Guitart, Jordi Torres, Ricardo Bianchini
Issue Date:June 2011
pp. 131-142
Popular Internet services are hosted by multiple geographically distributed data centers. The location of the data centers has a direct impact on the services' response times, capital and operational costs, and (indirect) carbon dioxide emissions. Selectin...
 
Using Semantics for Resource Allocation in Computing Service Providers
Found in: Services Computing, IEEE International Conference on
By Jorge Ejarque, Marc de Palol, Inigo Goiri, Ferran Julia, Jordi Guitart, Jordi Torres, Rosa M. Badia
Issue Date:July 2008
pp. 583-587
Service providers (SP) business goals require an efficient management of their computational resources in order to perform provisioning, deployment, execution and adaptation which traditionally require human intervention. The Semantically-Enhanced Resource...
 
Tailoring Resources: The Energy Efficient Consolidation Strategy Goes Beyond Virtualization
Found in: Autonomic Computing, International Conference on
By Jordi Torres, David Carrera, Vicenç Beltran, Nicolás Poggi, Kevin Hogan, Josep Ll. Berral, Ricard Gavaldà, Eduard Ayguadé, Toni Moreno, Jordi Guitart
Issue Date:June 2008
pp. 197-198
Virtualization and consolidation are two complementary techniques widely adopted in a global strategy to reduce system management complexity. In this paper we show how two simple and well-known techniques can be combined to dramatically increase the energy...
 
Experiences with Simulations - A Light and Fast Model for Secure Web Applications
Found in: Parallel and Distributed Systems, International Conference on
By Ramon Nou, Jordi Guitart, David Carrera, Jordi Torres
Issue Date:July 2006
pp. 177-186
Using simulations of a complex system such as a Web Application Server provides us with a tool that allows the running of tests without using the resources needed in a real system; thus enabling a
 
Risk-Driven Proactive Fault-Tolerant Operation of IaaS Providers
Found in: 2013 IEEE 5th International Conference on Cloud Computing Technology and Science (CloudCom)
By Jordi Guitart,Mario Macias,Karim Djemame,Tom Kirkham,Ming Jiang,Django Armstrong
Issue Date:December 2013
pp. 427-432
In order to improve service execution in Clouds, the management of Cloud Infrastructure has to take measures to adhere to Service Level Agreements and Business Level Objectives, from the application layer through to how services are supported at the lowest...
 
Client Classification Policies for SLA Enforcement in Shared Cloud Datacenters
Found in: Cluster Computing and the Grid, IEEE International Symposium on
By Mario Macías,Jordi Guitart
Issue Date:May 2012
pp. 156-163
In Utility Computing business model, the owners of the computing resources negotiate with their potential clients to sell computing power. The terms of the Quality of Service (QoS) and the economic conditions are established in a Service-Level Agreement (S...
 
Efficient Data Management Support for Virtualized Service Providers
Found in: Parallel, Distributed, and Network-Based Processing, Euromicro Conference on
By IIñigo Goiri, Ferran Julia, Jordi Guitart
Issue Date:February 2009
pp. 409-413
Virtualization has been lately introduced for supporting and simplifying service providers management with promising results. Nevertheless, using virtualization introduces also new challenges that must be considered. One of them relates with the data manag...
 
On the Anticipation of Resource Demands to Fulfill the QoS of SaaS Web Applications
Found in: 2012 13th IEEE/ACM International Conference on Grid Computing (GRID)
By Gemma Reig,Jordi Guitart
Issue Date:September 2012
pp. 147-154
Companies are currently turning to the use of web applications offered as Cloud services, expecting a certain QoS expressed by means of a maximum response time. Virtual Machines hosting these applications may vary their resource allotment as a consequence ...
 
Prediction of Job Resource Requirements for Deadline Schedulers to Manage High-Level SLAs on the Cloud
Found in: Network Computing and Applications, IEEE International Symposium on
By Gemma Reig, Javier Alonso, Jordi Guitart
Issue Date:July 2010
pp. 162-167
For a non IT expert to use services in the Cloud is more natural to negotiate the QoS with the provider in terms of service-level metrics --e.g. job deadlines-- instead of resource-level metrics --e.g. CPU MHz. However, current infrastructures only support...
 
SLA-driven Elastic Cloud Hosting Provider
Found in: Parallel, Distributed, and Network-Based Processing, Euromicro Conference on
By Josep Oriol Fitó, Ííigo Goiri Presa, Jordi Guitart
Issue Date:February 2010
pp. 111-118
It is clear that Cloud computing is and will be a sea change for the Information Technology by changing the way in which both software and hardware are designed and purchased. In this work we address the use of this emerging computing paradigm into web hos...
 
GreenHadoop: leveraging green energy in data-processing frameworks
Found in: Proceedings of the 7th ACM european conference on Computer Systems (EuroSys '12)
By Jordi Guitart, Jordi Torres, Kien Le, Ricardo Bianchini, Inigo Goiri, Thu D. Nguyen
Issue Date:April 2012
pp. 57-70
Interest has been growing in powering datacenters (at least partially) with renewable or "green" sources of energy, such as solar or wind. However, it is challenging to use these sources because, unlike the "brown" (carbon-intensive) energy drawn from the ...
     
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