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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Evans, J.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024High temperature co-polyester thermoplastic elastomer nanocomposites for flexible self-regulating heating devicescitations
- 2020The effect of conductive network on positive temperature coefficient behaviour in conductive polymer compositescitations
- 2016ORIENTATION OF COBALTOCENIUM CATIONS INTERCALATED INTO THE V2O5.1.6H(2)O XEROGEL DETERMINED BY SOLID-STATE H-2 NMR-SPECTROSCOPYcitations
- 2016Direct ink-jet deposition of ceramic green bodies: I - Formulation of build materials
- 2016Structural chemistry of A3CuBO6 (A = Ca, Sr; B = Mn, Ru, Ir) as a function of temperature.citations
- 2016Structural description of pressure-induced amorphization in ZrW2O8.citations
- 2016THE STRUCTURE OF CO(ETA-C5H5)(2)(+) AND NME(4)(+) INTERCALATES OF MNPS3 - AN X-RAY, NEUTRON-DIFFRACTION, AND SOLID-STATE NMR-STUDYcitations
- 2014Chandra Science Operational Data System Migration to Linux: Herding Cats through a Funnel
- 2013Base-free glycerol oxidation: studying the effects of structural and acid properties of support in bimetallic catalysts
- 2012Iris: The VAO SED Application
- 2009Dielectric measurements on a novel Ba1-aEuro parts per thousand x Ca (x) TiO3 (BCT) bulk ceramic combinatorial librarycitations
- 2008Autonomous underwater vehicles (AUVs) and investigations of the ice-ocean interface in Antarctic and Arctic waterscitations
- 2004Fatigue-creep and plastic collapse of notched barscitations
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article
Chandra Science Operational Data System Migration to Linux: Herding Cats through a Funnel
Abstract
Migration to a new operational system requires technical and non-technical planning to address all of the functional associations affiliated with an established operations environment. The transition to (or addition of) a new platform often includes project planning that has organizational and operational elements. The migration likely tasks individuals both directly and indirectly involved in the project, so identification and coordination of key personnel is essential. The new system must be accurate and robust, and the transition plan typically must ensure that interruptions to services are minimized. Despite detailed integration and testing efforts, back-up plans that include procedures to follow if there are issues during or after installation need to be in place as part of the transition task.In this paper, we present some of the important steps involved in the migration of an operational data system. The management steps include setting objectives and defining scope, identifying stakeholders and establishing communication, assessing the environment and estimating workload, building a schedule, and coordinating with all involved to see it through.We discuss, specifically, the recent migration of theChandra data system and data center operations from Solaris 32 to Linux 64. The code base is approximately 2 million source lines of code, and supports proposal planning, science mission planning, data processing, and the Chandra data archive. The overall project took approximately 18 months to plan and implement with the resources we had available. Data center operations continued uninterrupted with the exception of a small downtime during the changeover. We highlight our planning and implementation, the experience we gained during the project, and the lessons that we have learned.