Managing Large Scale Experiments in Distributed Testbeds
نویسندگان
چکیده
Performing experiments that involve a large amount of resources or a complex conguration, proves to be a hard task. We present Expo, which is a tool for conducting experiments on distributed platforms. First, the tool is described along with the concepts of resource and task sets, which abstracts away some of the complexity in the manage of resources and software execution. Next, the tool is compared with other similar solutions based on some qualitative criteria, scalability and expressiveness tests as well as the feedback coming from using dedicated testbeds. The report nishes with the evaluation of Expo scalability and some uses cases in Grid'5000 and PlanetLab. Our experience showed that Expo is a promising tool to help the user with two primary concerns: how to perform a large scale experiment e ciently and easily, together with its reproducilibity. Key-words: Grid Computing, Distributed Application, Experiment conduction, Testbed, Experiment methodology. ∗ INRIA GRENOBLE † LIG ‡ Université Joseph Fourier Grenoble I § CNRS ha l-0 07 42 58 2, v er si on 1 16 O ct 2 01 2 Conduite d'expériences de grande taille sur plates-formes d'expérimentation distribuées Résumé : Conduire des expériences qui impliquent un grand nombre de ressources ou une conguration complexe, s'avère très di cile. Dans ce rapport, nous présentons Expo qui est un outil pour la conduite d'expériences sur les plates-formes distribuées. Ce rapport débute par la description de l'outil avec les concepts d'ensemble de ressources et d'ensemble de tâches, qui o rent des abstractions pour faciliter la gestion des tâches et des ressources. Ensuite, l'outil est comparé avec d'autres solutions basées sur des critères qualitatifs, et en utilisant des tests de scalabilité et d'expressivité ainsi que des retours après exécution sur des plates-formes d'expérimentation. Pour nir, la scalabilité d'Expo est evalué et quelques cas d'utilisation sur Grid'5000 et PlanetLab sont présentés. Notre expérience démontre qu'Expo peut aider les chercheurs sur deux points: comment conduire une expérience e cacement et facilement, et comment assurer sa reproductibilité. Mots-clés : Expérimentation, Expériences à grande échelle, Plates-formes d'expérimentation, Méthodologie d'expérimentation ha l-0 07 42 58 2, v er si on 1 16 O ct 2 01 2 Expo: Managing Larg Scale Experiments 3
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