DHPC Talk DHPCT-037
Remote Data Access in Distributed Object-Oriented Middleware
Heath James
Archived: 8 July 1999
Presented at Adelaide University,
May 1999.
Abstract
Efficient, scalable remote access to data is a key aspect in wide area
metacomputing environments. One of the limitations of current
client-server computing models is their inability to create, retain
and trade tokens which represent data or services on remote computers
alongwith the metadata to adequately describe the data or services.
Most current client-server software systems require the user to submit
all the data inputs that are needed for a remote operation, and after
the operation is complete, all the resultant output data is returned
to the originating client. Pipelining remote processes requires data
be retained at the remote site for achieving performance on high
latency wide area networks. We introduce the DISCWorld Remote Access
Mechanism (DRAM), an integral component of our DISCWorld metacomputing
environment, which provides the user and system with a scalable
abstraction over remote data and the operations that are possible on
the data. We present an extension of the DRAM concept and
implementation to represent and describe data that has not yet been
created, the ``DRAM Future'' (DRAMF). We show how the use of the DRAMF
facilitates efficient metacomputing scheduling and runtime
optimisation on high performance distributed systems.
Powerpoint version of the slides
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