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Communications and consistency in mobile file systems

P. Honeyman, L.B. Huston
1995 IEEE personal communications  
To overcome availability, latency, bandwidth, and cost barriers of mobile networks, mobile clients of distributed file systems switch between connected and disconnected modes of operation.  ...  Lying between these are modes of operation that refine the consistency semantics of cached files, allowing a mobile client to select a mode appropriate for the the prevailing network conditions.  ...  A disconnected client keeps a log of local modifications to the file system. When convenient, logged operations are replayed over the network.  ... 
doi:10.1109/98.475987 fatcat:qf7frtz4ybdnjdvhtr26jl6tm4

Transparent disconnected operation for fault-tolerance

James Jay Kistler, M. Satyanarayanan
1991 ACM SIGOPS Operating Systems Review  
Conclusion We consider the ability to operate while disconnected a significant advantage in a distributed file system.  ...  It is not hard to envision a style of disconnected operation where users manually copy files to a local file system on the client workstation prior to disconnection, and then manually copy updated objects  ... 
doi:10.1145/122140.122150 fatcat:r3hzgrvxj5g43clbg6i2l56ley

Transparent disconnected operation for fault-tolerance

James Jay Kistler, M. Satyanarayanan
1990 Proceedings of the 4th workshop on ACM SIGOPS European workshop - EW 4  
Conclusion We consider the ability to operate while disconnected a significant advantage in a distributed file system.  ...  It is not hard to envision a style of disconnected operation where users manually copy files to a local file system on the client workstation prior to disconnection, and then manually copy updated objects  ... 
doi:10.1145/504136.504143 dblp:conf/sigopsE/KistlerS90 fatcat:kixymwerl5e4bgnb4qnbaulb6q

Nonblocking Distributed Replication of Versioned Files

Lukáš Hejtmánek, Luděk Matyska
2007 Journal of Software  
In this paper, we propose a distributed data storage framework that supports unrestricted offline access. The system does not explicitly distinguish between connected and disconnected states.  ...  A future work will include also direct support for non-versioned files. Index Terms-lock-free distributed replication, disconnected operations, file versioning, conflict avoidance  ...  ACKNOWLEDGMENTS This research is supported by a research intent "Optical Network of National Research and Its New Applications" (MŠM 6383917201) and by the CESNET Development Fund project 172/2005.  ... 
doi:10.4304/jsw.2.5.16-23 fatcat:mrnqwtmduvh2zeze2y252qakey

An empirical study of a highly available file system

Brian D. Noble, M. Satyanarayanan
1994 Proceedings of the 1994 ACM SIGMETRICS conference on Measurement and modeling of computer systems - SIGMETRICS '94  
In this paper we present results from a six-month empmcal study of the high availabilityy aspectsof the Coda Fde System.  ...  Most importantly, we would like to thank our many users for trusting our system and being patient with "the very last revision of the data collection software, we promise!"  ...  This paper is our attempt to answer this question for the Coda File System. To the best of our knowledge, this is the first empirical study of a highly available distributed file system.  ... 
doi:10.1145/183018.183033 dblp:conf/sigmetrics/NobleS94 fatcat:epk6sun5gzcrzcdenldj2elypq

Disconnected operation in the Coda file system

James J. Kistler, M. Satyanarayanan
1991 Proceedings of the thirteenth ACM symposium on Operating systems principles - SOSP '91  
In this paper, we show that disconnected operation is feasible, efficient and usable by describing its design and implementation in the Coda File System.  ...  Disconnected operation is a mode of operation that enables a client to continue accessing critical data during temporary failures of a shared data repository.  ...  If system files are excluded, the absence of Disconnected Operation in the Coda File System . 2 I "E!  ... 
doi:10.1145/121132.121166 dblp:conf/sosp/KistlerS91 fatcat:7i4xxovainambjrnb46krp5eve

Disconnected operation in the Coda file system

James J. Kistler, M. Satyanarayanan
1991 ACM SIGOPS Operating Systems Review  
In this paper, we show that disconnected operation is feasible, efficient and usable by describing its design and implementation in the Coda File System.  ...  Disconnected operation is a mode of operation that enables a client to continue accessing critical data during temporary failures of a shared data repository.  ...  If system files are excluded, the absence of Disconnected Operation in the Coda File System . 2 I "E!  ... 
doi:10.1145/121133.121166 fatcat:yozggmkzinb37dat74kn54dr7m

Disconnected operation in the Coda File System

James J. Kistler, M. Satyanarayanan
1992 ACM Transactions on Computer Systems  
In this paper, we show that disconnected operation is feasible, efficient and usable by describing its design and implementation in the Coda File System.  ...  Disconnected operation is a mode of operation that enables a client to continue accessing critical data during temporary failures of a shared data repository.  ...  If system files are excluded, the absence of Disconnected Operation in the Coda File System . 2 I "E!  ... 
doi:10.1145/146941.146942 fatcat:7e7evjr3ybcfzpgjbxeku2ijse

An empirical study of a highly available file system

Brian D. Noble, M. Satyanarayanan
1994 Performance Evaluation Review  
In this paper we present results from a six-month empmcal study of the high availabilityy aspectsof the Coda Fde System.  ...  Most importantly, we would like to thank our many users for trusting our system and being patient with "the very last revision of the data collection software, we promise!"  ...  This paper is our attempt to answer this question for the Coda File System. To the best of our knowledge, this is the first empirical study of a highly available distributed file system.  ... 
doi:10.1145/183019.183033 fatcat:p2ejewuxojfytcgpw7m5y4eabm

Designing an NFS-based mobile distributed file system for ephemeral sharing in proximity networks

N. Michalakis, D.N. Kalofonos
2004 2004 4th Workshop on Applications and Services in Wireless Networks, 2004. ASWN 2004.  
This paper addresses the need for ephemeral file sharing in proximity networks and explores the necessary requirements that a mobile distributed file system (M-DFS) should satisfy in order to operate properly  ...  We chose an M-DFS design based on the widely deployed NFS because of its ease of portability, lightweight model and its use in the past as a basis for building distributed file systems.  ...  distributed file system (M-DFS).  ... 
doi:10.1109/aswn.2004.185175 fatcat:or35rln63bbaloaqo7eclrnezi

Secure and Fault Tolerant Distributed Framework with Mobility Support [chapter]

Lukáš Hejtmánek
2008 Grid Middleware and Services  
In this paper, we propose an architecture of distributed data storage framework that incorporates fault tolerance, mobility support, and security.  ...  Main goal of our system is to provide equal opportunities for both connected and disconnected clients. Consequence is that mutual exclusion may not be involved.  ...  I would also like to thank to Luděk Matyska and to Petr Holub for stimulating discussions and help with the work described in this paper.  ... 
doi:10.1007/978-0-387-78446-5_19 fatcat:b3576zphbfg4zownbsbbjp55qi

The influence of scale on distributed file system design

M. Satyanarayanan
1992 IEEE Transactions on Software Engineering  
Performance, operability, and security are dominant considerations in the design of these systems. Availability is a further consideration in the design of Coda.  ...  This paper uses Andrew and Coda, distributed file systems built at Carnegie Mellon University, to validate this proposition.  ...  Our operational experience in Andrew and Coda confirms the value of the volume abstraction in a large distributed file system.  ... 
doi:10.1109/32.120311 fatcat:ucixxxpvtzgmbjxwddeygfrfw4

The evolution of Coda

M. Satyanarayanan
2002 ACM Transactions on Computer Systems  
In this article, we describe how the Coda file system has evolved to meet this challenge through the development of mechanisms for server replication, disconnected operation, adaptive use of weak connectivity  ...  The article closes with a discussion of the technical and nontechnical lessons that can be learned from the evolution of the system.  ...  In addition, I would also like to thank a number of Coda users whose constructive feedback has been particularly helpful: David Andersen, David Eckhardt, Tetsuro Muranaga, Owen LeBlanc, Brett Lymn, Dushyanth  ... 
doi:10.1145/507052.507053 fatcat:lob5fyaqh5edrlbxctvkzupcby

Document Archiving, Replication and Migration Container for Mobile Web Users [article]

P. Stanski, S. Giles, A. Zaslavsky
1998 arXiv   pre-print
This paper discusses issues of workstation mobility and proposes a solution wherein the data structures are accessed in an encapsulated form - through the Portable File System (PFS) wrapper.  ...  The paper discusses an implementation of the Portable File System, highlighting the architecture and commenting upon performance of an experimental system.  ...  Distributed File Systems Approach The disconnected operations problem has already been addressed in some distributed file systems.  ... 
arXiv:cs/9809036v1 fatcat:whuhnlf4nraprnhxvkjkkkwceu

A peer-to-peer file search and download protocol for wireless ad-hoc networks

Hasan Sözer, Metin Tekkalmaz, Ibrahim Korpeoglu
2009 Computer Communications  
In this paper, we propose a file sharing system that is able to answer location queries, and also discover and maintain the routing information that is used to transfer files from a source peer to another  ...  The paper includes a sample scenario to make the operations of the system clearer.  ...  In Section 5, a working scenario of the system is described to show how each operation updates and maintains the distributed location and routing information stored in the system.  ... 
doi:10.1016/j.comcom.2008.09.004 fatcat:qyyuvj7bybdhhdt326fly3peda
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