Abstract - Technical Program - OSDI 99
The Design of a Multicast-based Distributed File System
Björn Grönvall, Assar Westerlund, Stephen Pink
Swedish Institute of Computer Science and Luleå University of Technology
JetFile is a distributed file system designed to support shared file
access in a heterogenous environment such as the Internet. It uses
multicast communication and optimistic strategies for synchronization
JetFile relies on "peer-to-peer" communication
over multicast channels. Most of the traditional file server
responsibilities have been decentralized. In particular, the more
heavyweight operations such as serving file data and attributes are,
in our system, the responsibility of the clients. Some functions such
as serializing file updates are still centralized in JetFile. Since
serialization is a relatively lightweight operation in our system,
serialization is expected to have only minor impact on scalability.
We have implemented parts of the JetFile design and have measured
its performance over a local-area network and an emulated wide-area
network. Our measurements indicate that, using a standard benchmark,
JetFile performance is comparable to that of local-disk based file
systems. This means it is considerably faster than commonly used
distributed file systems such as NFS and AFS.
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