Giuseppe Amato, Marco Biscari, Gianni Mainetto and Fausto Rabitti
Overview of PIOS: a Physically Independent Object Server
In Fully Integrated Data Environments , M.P. Atkinson (ed.), to be
published by Springer Verlag
Abstract:
PIOS (Physically Independent Object Server) is a prototype implementation of an object
store intended to test some new ideas and techniques in the framework of the FIDE2
project. The main idea in PIOS is the support of Physical Objects Independence in an
object store. Physical Independence allows the change of strategies in storing physical
objects in the database without affecting the applications since they always see the same
database schema. Physical Independence opens up opportunities to enhance performance in
areas such query optimisation and high performance concurrency control. In this paper, an
overview of the PIOS architecure is presented, stressing the new techniques implemented in
the system to exploit physical independence in improving system performance.
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