The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Dans cet article, nous proposons un nouveau système de fichiers nommé Ad-hoc Filesystem qui cible les réseaux sans fil ad-hoc. Le système de fichiers ad hoc est un système de fichiers sans serveur qui génère automatiquement un espace partagé temporaire entre plusieurs machines mobiles lorsqu'elles se rassemblent dans une plage communicable. L'espace généré est disponible gratuitement pour les machines participantes et peut être utilisé pour tout travail temporaire sur place. La conception du système de fichiers Ad-hoc est fortement motivée par les récentes technologies de réseau sans fil et les avancées des techniques de réseau ad-hoc. Cependant, cibler un réseau aussi instable nous oblige à adopter une conception complètement différente des systèmes de fichiers existants. Nous avons conçu un premier prototype de système de fichiers Ad-hoc et évalué les résultats de la simulation. Notre conception repose fortement sur l'hypothèse que les personnes souhaitant travailler ensemble formeraient un groupe stable dans une plage donnée, et que la réplication des données sur deux machines différentes suffirait à fournir un niveau de disponibilité approprié. Par conséquent, Ad-hoc Filesystem distribue les fichiers entre plusieurs machines et les duplique, afin de garder les fichiers disponibles même si certaines des machines participantes quittent arbitrairement la portée de communication. Les entrées du répertoire sont conservées en tant que mécanisme à état logiciel maintenu par l'échange de paquets de diffusion. Les résultats de la simulation montrent que l'utilisation de la diffusion pour maintenir l'état du système n'affecte guère les performances globales du système, et que des optimisations telles que le retard des réponses avec la diffusion et la détection d'autres paquets de manière aléatoire pendant le délai réduisent considérablement la surcharge. Le résultat indique également que notre stratégie qui conserve deux répliques pour chaque donnée promet d'assurer la disponibilité. Bien que des recherches plus approfondies basées sur une mise en œuvre réelle restent un travail important, nous pensons que le prototype contribue à réaliser la possibilité d'un système de fichiers ad hoc en synthétisant un certain nombre de travaux antérieurs dans des domaines tels que les systèmes de fichiers réseau, la réplication de serveur et les réseaux sans fil ad hoc.
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Kinuko YASUDA, Tatsuya HAGINO, "Design and Concept of Ad-hoc Filesystem" in IEICE TRANSACTIONS on Communications,
vol. E84-B, no. 4, pp. 920-929, April 2001, doi: .
Abstract: In this paper, we propose a new filesystem named Ad-hoc Filesystem which targets ad-hoc wireless networks. Ad-hoc Filesystem is a serverless filesystem which automatically generates temporary shared space among multiple mobile machines when they gather in a communicable range. The generated space is freely available for participating machines and can be used for any temporary work there. The design of Ad-hoc Filesystem is strongly motivated by the recent wireless network technologies and advances of ad-hoc network techniques. However, targeting such an unstable network forces us a completely different design from existing filesystems. We have designed an initial prototype of Ad-hoc Filesystem and have evaluated the simulation results. Our design is strongly based on an assumption such that people who wish to work together would form a stable group in a range, and replicating data on two different machines would be enough to provide a proper level of availability. Hence, Ad-hoc Filesystem distributes files among multiple machines and duplicates them, in order to keep the files available even if some of participating machines arbitrarily leave the communication range. The directory entries are kept as a soft-state mechanism maintained by exchanging broadcast packets. The simulation results show that using broadcast to maintain system state hardly affects the overall system performance, and optimizations such that delaying replies with broadcast and sensing other packets promiscuously during the delay reduce the overhead significantly. Also the result indicates that our strategy that keeps two replicas for each data is promising to provide availability. Although further investigation based on real implementation remains important work, we believe that the prototype has a contribution to realize the possibility of ad-hoc filesystem by synthesizing number of previous works in areas such as network filesystems, server replication and ad-hoc wireless networks.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e84-b_4_920/_p
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@ARTICLE{e84-b_4_920,
author={Kinuko YASUDA, Tatsuya HAGINO, },
journal={IEICE TRANSACTIONS on Communications},
title={Design and Concept of Ad-hoc Filesystem},
year={2001},
volume={E84-B},
number={4},
pages={920-929},
abstract={In this paper, we propose a new filesystem named Ad-hoc Filesystem which targets ad-hoc wireless networks. Ad-hoc Filesystem is a serverless filesystem which automatically generates temporary shared space among multiple mobile machines when they gather in a communicable range. The generated space is freely available for participating machines and can be used for any temporary work there. The design of Ad-hoc Filesystem is strongly motivated by the recent wireless network technologies and advances of ad-hoc network techniques. However, targeting such an unstable network forces us a completely different design from existing filesystems. We have designed an initial prototype of Ad-hoc Filesystem and have evaluated the simulation results. Our design is strongly based on an assumption such that people who wish to work together would form a stable group in a range, and replicating data on two different machines would be enough to provide a proper level of availability. Hence, Ad-hoc Filesystem distributes files among multiple machines and duplicates them, in order to keep the files available even if some of participating machines arbitrarily leave the communication range. The directory entries are kept as a soft-state mechanism maintained by exchanging broadcast packets. The simulation results show that using broadcast to maintain system state hardly affects the overall system performance, and optimizations such that delaying replies with broadcast and sensing other packets promiscuously during the delay reduce the overhead significantly. Also the result indicates that our strategy that keeps two replicas for each data is promising to provide availability. Although further investigation based on real implementation remains important work, we believe that the prototype has a contribution to realize the possibility of ad-hoc filesystem by synthesizing number of previous works in areas such as network filesystems, server replication and ad-hoc wireless networks.},
keywords={},
doi={},
ISSN={},
month={April},}
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TY - JOUR
TI - Design and Concept of Ad-hoc Filesystem
T2 - IEICE TRANSACTIONS on Communications
SP - 920
EP - 929
AU - Kinuko YASUDA
AU - Tatsuya HAGINO
PY - 2001
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E84-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2001
AB - In this paper, we propose a new filesystem named Ad-hoc Filesystem which targets ad-hoc wireless networks. Ad-hoc Filesystem is a serverless filesystem which automatically generates temporary shared space among multiple mobile machines when they gather in a communicable range. The generated space is freely available for participating machines and can be used for any temporary work there. The design of Ad-hoc Filesystem is strongly motivated by the recent wireless network technologies and advances of ad-hoc network techniques. However, targeting such an unstable network forces us a completely different design from existing filesystems. We have designed an initial prototype of Ad-hoc Filesystem and have evaluated the simulation results. Our design is strongly based on an assumption such that people who wish to work together would form a stable group in a range, and replicating data on two different machines would be enough to provide a proper level of availability. Hence, Ad-hoc Filesystem distributes files among multiple machines and duplicates them, in order to keep the files available even if some of participating machines arbitrarily leave the communication range. The directory entries are kept as a soft-state mechanism maintained by exchanging broadcast packets. The simulation results show that using broadcast to maintain system state hardly affects the overall system performance, and optimizations such that delaying replies with broadcast and sensing other packets promiscuously during the delay reduce the overhead significantly. Also the result indicates that our strategy that keeps two replicas for each data is promising to provide availability. Although further investigation based on real implementation remains important work, we believe that the prototype has a contribution to realize the possibility of ad-hoc filesystem by synthesizing number of previous works in areas such as network filesystems, server replication and ad-hoc wireless networks.
ER -