DHPC Technical Report DHPC-032
DWorFS: File System Support for Legacy Applications in DISCWorld
C.J.Patten, F.A.Vaughan, K.A.Hawick and A.L.Brown
Archived: 22 January 1998
Published in Proc. of the 5th IDEA Workshop, Fremantle, February 1998.
Abstract
Applications can be embedded in a distributed computing environment
such as DISCWorld in two ways. One approach is to (re)write
applications to conform with data access interfaces such as libraries
which can communicate with distributed and/or hierarchical
storage. Alternatively, unmodified applications can be provided with
normal file system services, often the only approach with legacy or
commercial applications where source code is not freely available. We
describe some ideas for supporting such applications, through a system
we are designing and implementing called the DISCWorld File System
(DWorFS), which uses the ubiquitous Network File System (NFS)
protocol. User requests are formulated in two stages: negotiation for
virtual directories and files of input data, or locations for output
data; and an invocation of the application, to which the virtual input
and output file(s) are specified.
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