1. CARDS: cluster-aware remote disks
This paper appears in:
Cluster Computing and the Grid, 2003. Proceedings. CCGrid 2003. 3rd IEEE/ACM International Symposium
on
Date of Conference: 12-15 May 2003
Author(s): Olaru, V.
Comput. Sci. Dept., Karlsruhe Univ., Germany
Tichy, W.F.
Page(s): 112 - 119
Product Type: Conference Publications
This paper presents Cluster-Aware Remote Disks (CARDs), a Single System I/O
architecture for cluster computing. CARDs virtualize accesses to remote cluster disks
over a System Area Network. Their operation is driven by cooperative caching policies
that implement a joint management of the cluster caches. All the CARDS of a given disk
employ a common policy, independently of other CARD sets. CARD drivers have been
implemented as Linux kernel modules which can flexibly accommodate various
cooperative caching algorithms. We designed and implemented a decentralized policy
called Home-based Serverless Cooperative Caching (HSCC). HSCC showed cache hit
ratios over 50% for workloads that go beyond the limit of the global cache. The best
speedup of a CARD over a remote disk interface was 1.54.
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Additional Details
On page(s): 112
Print ISBN: 0-7695-1919-9
INSPEC Accession Number: 8064738
Digital Object Identifier : 10.1109/CCGRID.2003.1199359
Date of Current Version : 21 May 2003
Issue Date : 12-15 May 2003

2. Webgene : A Generative and Web-Based Learning
Architecture to Teach Operating Systems in
Undergraduate Courses
This paper appears in:
Education, IEEE Transactions on
Date of Publication: Nov. 2006
Author(s): Buendia, F.
Dept. of Syst. Data Process. & Comput., Univ. Politecnica de Valencia
Cano, J.-C.
Volume: 49 , Issue: 4
Page(s): 464 - 473
Product Type: Journals & Magazines
ABSTRACT
Operating systems is a fundamental topic underlying many modern disciplines,
including computing, telematics, and control engineering. Moreover, operating systems
is one of the core courses considered under the most important curricula
recommendations. The learning process in this area involves both a theoretical and a
practical part that students have to learn and put into practice. To reinforce operating
systems fundamentals, simulation tools and instructional operating systems have been
proposed. However, few of these tools address a learning approach that permits one to
work with real operating systems while supporting an active learning methodology that
integrates theory and practice. This paper applies generative learning methods and
Web-based applications to operating systems courses. WebgeneOS is presented as an
experimental learning system that leads students through a more active participation in
the learning process. WebgeneOS combines the universal connectivity of Web
technologies with the educational theory provided by the generative learning methods.
The system allows students to send their system programs using Web forms, execute
them in a native operating system, and receive their results and feedback information
through Web browsers. The benefits of WebgeneOS were evaluated by comparing
students' grades. The evaluation involved students attending operating systems courses
during the 2002-2003, 2003-2004, and 2004-2005 academic years. Students using
WebgeneOS improved their grades by about 13%. Moreover, the system offered a well-
balanced formation between the theoretical and the practical learning outcomes.
Overall, this paper made evident that Web technologies and generative learning
methods help students in their learning process
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Index Terms are available to subscribers and IEEE members.
Additional Details
References (25)
ISSN : 0018-9359
INSPEC Accession Number: 9224768

3. Digital Object Identifier : 10.1109/TE.2006.882368
Date of Current Version : 13 November 2006
Issue Date : Nov. 2006
Sponsored by : IEEE Education Society
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