| 1. |
- Bogdanov, Dan, et al.
(författare)
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VirtualLife : Secure Identity Management in Peer-to-Peer Systems
- 2009
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Ingår i: User Centric Media. - Berlin, Heidelberg : Springer Berlin Heidelberg. ; , s. 181-188
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Konferensbidrag (refereegranskat)abstract
- The popularity of virtual worlds and their increasing economic impacthas created a situation where the value of trusted identification has risensubstantially. We propose an identity management solution that provides theuser with secure credentials and allows to decrease the required trust that theuser must have towards the server running the virtual world. Additionally, theidentity management system allows the virtual world to incorporate reputationinformation. This allows the “wisdom of the crowd” to provide more input tousers about the reliability of a certain identity. We describe how to use theseidentities to provide secure services in the virtual world. These include securecommunications, digital signatures and secure bindings to external services.
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| 2. |
- Edlund, Åke, et al.
(författare)
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Cloud Computing and Startups
- 2011
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Ingår i: Cloud Computing. - : CRC Press. - 9781439856413 ; , s. 31-43
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Bokkapitel (refereegranskat)abstract
- Cloud computing characteristics map to the needs of startups very well. Sowell that a new group of cloud specific startups is now rapidly evolving. Onone hand, one could argue that it is just the same active group that hasquickly picked up a new technology, but on the other hand the number ofstartups evolving and how fast they can get started and how far they can goon low funding is a game changer. Startups have always been very good atbootstrapping, getting as far as possible on no or very little funding. But now,with cloud computing and high quality open source software, better and lessexpensive network, a more open mobile market, and more evolved customerbase, the bootstrapping can take you very far, possibly all the way to a selfsupported profitable business.For investors the market is also changing, creating a need for very early stage,close-to-the-founder, technology knowledgeable services — the seed accelera-tors. The seed accelerators act as an early investor — helping the startupswith technology decisions — and at the same time helping future investors inthe identification of interesting objects.
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| 3. |
- Edlund, Åke, et al.
(författare)
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Practical Cloud Evaluation from a Nordic eScience User perspective
- 2011
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Ingår i: Proceedings of the 5th international workshop on Virtualization technologies in distributed computing. - New York, NY, USA : ACM.
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Konferensbidrag (refereegranskat)abstract
- In this paper, we describe the findings of the NEON project - a cross-Nordic - Sweden, Norway, Denmark, Finland and Iceland - project evaluating the usefulness of private versus public cloud services for HPC users. Our findings are briefly that private cloud technology is not mature enough yet to provide a transparent user experience. It is expected that this will be the case mid 2012. The cost efficiency of both public and private cloud should be continuously monitored as there is a strong downward trend. This conclusion is supported by NEON experimenting as well as larger initiatives e.g. StratusLab reports. Public cloud technology is mature enough but lacks certain features that will be necessary to include cloud resources in a transparent manner in a national infrastructure like the Norwegian NOTUR (www.notur.no) case, e.g. with respect to quota management. These features are expected to emerge in 2011 via third party management software and in the best of breed public cloud services. Public clouds are competitive in the low end for non-HPC jobs (low memory, low number of cores) on price. A significant fraction (ca. 20%) of the jobs running on the current Nordic supercomputer infrastructure are potentially suitable for cloud-like technology. This holds in particular for singlethreaded or single-node jobs with small/medium memory requirements and non-intensive I/O. There is a backlog of real supercomputer jobs that suffers from the non-HPC jobs on the supercomputer infrastructure. Off-loading these non-HPC jobs to a public cloud would effectively add supercomputing capacity. Another finding is that available storage capacity is not accessible in a user-friendly way; most storage clouds are only accessible via programmable interfaces. A number of experiments and piloting are presented to support these claims.
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| 4. |
- Ellert, Mattias, et al.
(författare)
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Advanced Resource Connector middleware for lightweight computational Grids
- 2007
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Ingår i: Future generations computer systems. - : Elsevier BV. - 0167-739X .- 1872-7115. ; 23:2, s. 219-240
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Tidskriftsartikel (refereegranskat)abstract
- As computational Grids move away from the prototyping state, reliability, performance and ease of use and maintenance become focus areas of their adoption. In this paper, we describe ARC (Advanced Resource Connector) Grid middleware, where these issues have been given special consideration. We present an in-depth view of the existing components of ARC, and discuss some of the new components, functionalities and enhancements currently under development. This paper also describes architectural and technical choices that have been made to ensure scalability, stability and high performance. The core components of ARC have already been thoroughly tested in demanding production environments, where it has been in use since 2002. The main goal of this paper is to provide a first comprehensive description of ARC.
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