| 1. |
- 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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| 2. |
- Syeed, Mahbubul, et al.
(författare)
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Socio-Technical Congruence in the Ruby Ecosystem
- 2014
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Ingår i: Proceedings of the 10th International Symposium on Open Collaboration (OpenSym 2014). - New York, NY, USA : ACM.
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Konferensbidrag (refereegranskat)
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| 3. |
- Vonge Corry, Aino, et al.
(författare)
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Traveling Architects – A New Way of Herding Cats
- 2006
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Ingår i: Lecture Notes in Computer Science. - Berlin, Heidelberg : Springer Berlin Heidelberg. - 0302-9743 .- 1611-3349. - 9783540488194 ; 4214/2006, s. 111-126
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Konferensbidrag (refereegranskat)abstract
- Making software developers work towards a common goal may be likened to herding cats. If we further spread developers around the globe, we run increased risks of being unable to design and impose coherent software architectures on projects, potentially leading to lower quality of the resulting systems. Based on our experiences in a large, distributed research and development project, PalCom, we propose that employing techniques from active user involvement in general (and from participatory design in particular) may help in designing and sharing quality software architectures. In particular, we present the Traveling Architects technique in which a group of architects visit development locations in order to engage developers and end users in software architecture work. We argue that using techniques such as these may potentially lead to higher quality of software architectures in particular for systems developed in a distributed setting.
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