Inlämning av Examensarbete / Submission of Thesis

Luca Guadagnini MSE-2009:05, pp. 82. COM/School of Computing, 2009.

The work

Författare / Author: Luca Guadagnini
Titel / Title: Dionysius - a Peer-to-peer Database Management System
Abstrakt Abstract:

With the introduction of the peer-to-peer paradigm in the world
of software, a lot of applications have been created in order to such
architecture. Most of them are developed for providing a data sharing
service among users connected to a network and programs such as
Napster, Gnutella, eMule and BitTorrent have became the so called
killer-applications. However some eorts have been spent in order to
develop other solutions with the usage of peer-to-peer paradigm. In the
case of databases some projects are started with the general purpose
of sharing data sets with other databases. Generally they push on the
idea of providing the data contained in their database schemes with
other peers in the network showing concepts such schema matching,
mapping tables and others which are necessary to establish connections
and data sending.
The thesis analyzes some of such projects in order to see which of
them is the most dened and well-supported by concepts and deni-
tions. Hyperion Project of the University of Torono in collaboration
with the University of Trento is the most promising and it aims to be
one of the rst Peer-to-Peer Database Management Systems. However
the common idea of considering the peer-to-peer paradigm equal to
data sharing - in the way presented by applications such as Napster
or others - leads to a lot diculties, it is hard to handle the data sets,
some operations must be done manually and there can be some cases
where the peer-to-peer paradigm is not applied at all. For this reason
the goal is to dene and show the concept of peer-to-peer database built
from the scratch with a suitable DBMS for it.
A real denition of peer-to-peer database has not been ever made
and here for the rst time we tried to give one according to our vision.
The denition depends on some precise concepts such global schema -
which is the original design of the database -, sub-schema - a well logical
dened sub-set of entities of the original schema - and binding tables
- necessary to allow the creation of constraints and relations among
the entities. Then to show the validity of such concepts and how a
management system for peer-to-peer databases can be developed and
used, a prototype (named Dionysius) has been realized by modifying
HSQLDB - an ordinary DBMS developed in Java - and adding the
peer-to-peer platform by using the JXTA libray set.

Ämnesord / Subject: Datavetenskap - Computer Science\Software Engineering

Nyckelord / Keywords: database, peer-to-peer

Publication info

Dokument id / Document id:
Program:/ Programme Masterprogram i Software engineering 120 p/Master´s program in Software engineering 120 p
Registreringsdatum / Date of registration: 12/03/2009
Uppsatstyp / Type of thesis: Masterarbete/Master's Thesis (120 credits)


Handledare / Supervisor: Mikael Roos
Examinator / Examiner: Dr Robert Feldt
Organisation / Organisation: Blekinge Institute of Technology
Institution / School: COM/School of Computing

+46 455 38 50 00

Files & Access

Bifogad uppsats fil(er) / Files attached: dionysius.pdf (1249 kB, öppnas i nytt fönster)