Ignacio M Llorente

Full Professor & Head of Research Group at Complutense University of Madrid

Ignacio M. Llorente, Ph.D in Computer Science (UCM) and Executive MBA (IE Business School), is a Full Professor (Catedratico) in Computer Architecture and the Head of the Distributed Systems Architecture Group at UCM, and Chief Executive Advisor and co-founder of the C12G Labs technology start-up. He held several appointments as independent IT expert for the European Commission and several companies and national governments; and consultant positions at ICASE NASA Langley and Sun Microsystems. Prof. Llorente is one of the pioneers and world's leading authorities on Cloud Computing. He has served on several Groups of Experts on Cloud Computing convened by international organizations, such as the European Commission and the World Economic Forum, and has contributed to several Cloud Computing panels and roadmaps. He is the Director of the OpenNebula Open-Source Project and participates in the main European projects in Cloud Computing. He founded and co-chaired the Open Grid Forum Working Group on Open Cloud Computing Interface. Prof. Llorente has given many keynotes and invited talks in the main international events in cloud computing, and has contributed to several cloud computing panels and roadmaps.

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A Flexible and Interoperable Cloud Operating System
by Ignacio M Llorente
Future enterprise data centers will look like private clouds supporting a flexible and agile execution of virtualized services, and combining local with public cloud-based infrastructure to enable highly scalable hosting environments. The key component in these cloud architectures will the cloud management system, also called cloud operating system (OS), being responsible for the secure, efficient and scalable management of the cloud resources. Cloud OS are displacing “traditional” OS, which will be part of the application stack.
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Article: Research Challenges in Cloud Computing
In a recent keynote at the 3rd EU-Japan Symposium on Future Internet and New Generation Networks we presented our view about the key research challenges in cloud computing. We briefly covered the state of the art and the open challenges in the main cloud layers that provide the tools and the infrastructure to develop and to run the applications in the Future Internet of Services. Here is a summary of the main points of the presentation.

Article: The Next Generation of Cloud Computing Platforms
Cloud Computing is transforming the way we use the web but there's still a long way to go before we make full use of the promise it offers. Professor Ignacio M Llorente looks ahead to a more flexible and agile future of internet-enabled service provision in a virtual computing environment.

Article: DSA-Research Participates in the EU Initiative to Integrate Cloud with Grid
Researchers from a collaboration of six European organizations have attracted funding work 2.3 million Euros to develop a new internet-based software project called StratusLab. The two yer project, headed up by Project Coordinator Dr Charles Loomis of CNRS, was launched in Paris. It aims to enhance distributed computing infrastructures, such as the European Grid Infrastructure (EGI), that allow research and higher education institutes from around the world to pool computing resources.

Video: Cloudscape 2: Advances in eInfrastructure
The key players at the CloudScape 2 event in Brussels, Belgium, talk about the Advances in eInfrastructure. They discuss the Digital Agenda for Europe, The Future of Cloud Computing, Barriers for Government, Visibility and Control of Where Data Goes, Providing a Legal Framework, Interoperability, Innovation, Revolutionizing Science, Complimentary Grid and Clouds, and More.

Report: The Future of Cloud Computing: Opportunities for European Cloud Computing Beyond 2010 PDF
This document provides a detailed analysis of Europe’s position with respect to cloud provisioning, and how this affects in particular future research and development in this area. The report is based on a series of workshops involving experts from different areas related to cloud technologies. In more detail, the identified opportunities are: (1) Provisioning and further development of Cloud infrastructures, where in particular telecommunication companies are expected to provide offerings; (2) Provisioning and advancing cloud platforms, which the telecommunication industry might see as a business opportunity, as well as large IT companies with business in Europe and even large non-IT businesses with hardware not fully utilized. (3) Enhanced service provisioning and development of meta-services: Europe could and should develop a ‘free market for IT services’ to match those for movement of goods, services, capital, and skills. Again telecommunication industry could supplement their services as ISPs with extended cloud capabilities; (4) provision of consultancy to assist businesses to migrate to, and utilize effectively, clouds. This implies also provision of a toolset to assist in analysis and migration.

Article: A Flexible and Interoperable Cloud Operating System
Future enterprise data centers will look like private clouds supporting a flexible and agile execution of virtualized services, and combining local with public cloud-based infrastructure to enable highly scalable hosting environments. The key component in these cloud architectures will be the cloud management system, also called cloud operating system (OS), being responsible for the secure, efficient and scalable management of the cloud resources. Cloud OS are displacing "traditional" OS, which will be part of the application stack.

Presentation: OpenNebula: An Innovative Open-Source Toolkit for Building Cloud Solutions
A description of the novel functionality of the OpenNebula open-source toolkit for cloud computing that has been incorporated into release 1.4 to address the technology challenges from the business use cases in the RESERVOIR project, and the ecosystem that is evolving around the OpenNebula open-source community.

Paper: Virtual Infrastructure Management in Private and Hybrid Clouds PDF
Contributors: Ignacio M Llorente & Borja Sotomayor
By Borja Sotomayor, Ruben S Montero, Ignacio M Llorente, and Ian Foster. One of the many definitions of "cloud" is that of an infrastructure-as-a-service (IaaS) system, in which IT infrastructure is deployed in a provider's data center as virtual machines. With IaaS clouds' growing popularity, tools and technologies are emerging that can transform an organization's existing infrastructure into a private or hybrid cloud. OpenNebula is an open source, virtual infrastructure manager that deploys virtualized services on both a local pool of resources and external IaaS clouds. Haizea, a resource lease manager, can act as a scheduling back end for OpenNebula, providing features not found in other cloud software or virtualization-based data center management software.

Article: Europe's Largest Grid Project Moves Closer to Cloud-Style Computing
Collaboration between EGEE and RESERVOIR The integration of two clans of computing, grid and cloud computing, is moving closer through collaboration between the projects Enabling Grids for E-sciencE (EGEE) and Resources and Services Virtualisation without Barriers (RESERVOIR).

Article: Interfaces for Private and Public Cloud Computing
An entire ecosystem is evolving around cloud computing. Interface standardization efforts, commercial products, cloud infrastructure and management services, virtual appliance providers and open-source solutions are filling the niches in the cloud ecosystem. The role and position of a component or a service in the ecosystem are defined by its capabilities, the consumers of those capabilities and its relationship with other components and services. This article presents public and private cloud computing from the perspective of their different application scope and interfaces.

Paper: Grid and Cloud Computing in E-Infrastructures PDF
Ignacio Contributes a Chapter on Grid and Cloud Computing to this e-Infrastructure Reflection Group (e-IRG) white paper In the move towards a sustainable pan-European e-Infrastructure, Europe must take care to choose and make best use of sustainable IT technologies. While academia has thus far approached distributed computing infrastructures using grid computing technology, useful for its federal ability, the introduction of the new cloud computing paradigm demands a fresh assessment and approach. Clouds and grids are currently developing in parallel and have strong potential to compliment each other. An understanding of their relationship, and the ways in which it will continue to change, offers opportunity to aid the development and efficient use of existing academic and commercial e-infrastructures.

Paper: Enterprise Usage of Clouds PDF
Position Papers: Enterprise Usage of Clouds

Article: Research Challenges In Cloud Infrastructures For 2009
This article elaborates on a presention given by Dr Llorente on the key differentiators between the RESERVOIR project and Amazon EC2, its research challenges in cloud infrastructures and a list of four topics for further research. This article describe some of the research challenges that will be addressed in 2009.

Article: Cloud and Grid Are Complementary Technologies
There is a growing number of articles trying to show how cloud computing is a new paradigm that supersedes Grid compuding by extending its functionality and simplifying its exploitation. This article talks about the differences and complementary features of Grid and Cloud Computing.

DSA-Research.org Blog
Research and Innovation in Cloud Computing
  • A multi-dimensional job scheduling
  • September 29 2015
    Since march Future Generation Computer Systems has made available (online) our paper entitled “A multi-dimensional job scheduling”. This work is the result of a collaboration with the research group led by Prof. Lucio Grandinetti (University of Calabria, Italy) and it can be accessed here. With the advent of new computing technologies, such as cloud computing […] ...

  • Special Issue on HPC for Advanced Modeling and Simulation of Materials
  • September 15 2015
    At the beginning of 2016 the Journal of Computer Physics Communications (Elsevier, JCR:3.122, Q1) will close a Special Issue in which I’m very honored to serve as Guest Editor. You may be interested in the following Call for Papers. Supercomputers are rapidly evolving as advances in architecture and semiconductor technology. High performance computing has been […] ...

  • Interference-Aware Component Scheduling for Reducing Tail Latency in Cloud Interactive Services
  • September 02 2015
    At the end of June one of our recent works in collaboration with the Institute of Computing Technology from the Chinese Academy of Sciences was presented at the 35th IEEE International Conference on Distributed Computing systems (ICDS 2015), which took place at Columbus (Ohio, USA). The paper can be accessed here. Large-scale interactive services usually […] ...

  • Double date at GridKa School 2015
  • August 31 2015
    Next week I’ll be in Karlsruhe (Germany) for this year’s GridKa School edition. This event takes place in Karlsruhe Institute of Technology since 2003. If two years ago I gave a talk, this time my participation will be double. Talk: From Mars to Earth through Cloud Computing Our society has benefited from Space exploration in […] ...

  • Interoperating grid infrastructures with the GridWay metascheduler
  • May 26 2015
    This paper describes the GridWay metascheduler and exposes its latest and future developments, mainly related to interoperability and interoperation. GridWay enables large-scale, reliable, and efficient sharing of computing resources over grid middleware. To favor interoperability, it shows a modular architecture based on drivers, which access middleware services for resource discovery and monitoring, job execution and […] ...

  • Producing approximate results with small correctness losses for cloud interactive services
  • May 25 2015
    Last week the 12th ACM International Conference on Computing Frontiers (CF’15) took place in Ischia (Italy). There our paper entitled “SARP: producing approximate results with small correctness losses for cloud interactive services” was presented. This work is a result of the collaboration with the Institute of Computing Technology from the Chinese Academy of Sciences, which […] ...

  • Cost-Effective Resource Configurations for Multi-Tenant Database Systems in Public Clouds
  • April 29 2015
    The International Journal of Cloud Applications and Computing has just published our paper entitled “Cost-Effective Resource Configurations for Multi-Tenant Database Systems in Public Clouds”. This work is the result of a collaboration with Prof. Patrick Martin‘s research group (Queen’s University, Canada). Cloud computing is a promising paradigm for deploying applications due to its large resource offerings […] ...

  • GWpilot: Enabling multi-level scheduling in distributed infrastructures with GridWay and pilot jobs
  • March 31 2015
    Current systems based on pilot jobs are not exploiting all the scheduling advantages that the technique offers, or they lack compatibility or adaptability. To overcome the limitations or drawbacks in existing approaches, this study presents a different general-purpose pilot system, GWpilot. This system provides individual users or institutions with a more easy-to-use, easy-to-install, scalable, extendable, […] ...

  • Distributed scheduling and data sharing in late-binding overlays
  • March 03 2015
    Pull-based late-binding overlays are used in some of today’s largest computational grids. Job agents are submitted to resources with the duty of retrieving real workload from a central queue at runtime. This helps overcome the problems of these complex environments: heterogeneity, imprecise status information and relatively high failure rates. In addition, the late job assignment […] ...

Open Grid Forum (OGF)
Open Grid Forum (OGF)

The Open Grid Forum (OGF) is a community of users, developers, and vendors leading the global standardization effort for grid computing. The work of OGF is carried out through community-initiated working groups, which develop standards and specifications in cooperation with other leading standards organizations, software vendors, and users. OGF hosts several events each year to further develop grid-related specifications and use cases and to share best practices.
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Ignacio M Llorente
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