Information Management in the Web  Informationsverwaltung in Netzen
			Date: Thur. 14-16   Location:     K40 Advisors: Heinz Schweppe, Office Hour: Wed 14-15.00 Artur Andrzejak, ZIB, andrzejak@zib.de and Valerie Bönström, Uli Raffel, Manuel Scholz

In this seminar we investigate issues and proposed solutions of internet scale data management. A good starting point for studying the problems involved are peer-to-peer file sharing systems like Gnutella, Freenet and others.

One of the most important issues is the localization of information. Distributed hashing and other forms of  data indexing are used for identifier based object access. Otherwise content based localization is needed. We will cover both  topics.

Middleware is a software layer which hides technical apects like distribution from application programms, see  e.g. Corba. Such layer is very important in mobile systems and other systems, where computer nodes can come and go at any time.

A particular aspect of many computing systems is fault tolerance. Replication is one of the primary techniques for implementing this particular middleware feature. However replication in widely distributed networks with many thousands of node is different from what is known from distributed databases. We will study replication and information propagation algorithms which are suited for these environment.

In the seminar we will deal with these issues.

		list of  talks
	Note: This is a research seminar for students specializing in Data Management / Distributed Systems. A course in databases, telematics or distributed systems is a prerequisite.  The seminar is also a good starting point for a master thesis (Diplomarbeit).  You are invited to give a talk in English, but this is not a must. The slides should be in English or German depending on the language of your talk. The topics suggested and the papers mentioned should stimulate your interest. The talk should NOT be a simple translation of one of the papers, but should reflect your own investigations.  Students working already on a thesis or research assistants are invited and  should be ready to give a talk.  Scheinkriterien: You will get a Seminarschein only if you fulfill the following criteria:    - Talk of 45-60  minutes.    - You lead the dicussion  of about 30 minutes after the talk.    - You have  written a  research paper on the topic of your talk ready                                                                                           ( >=10 pages).    - A draft of the paper is to be handed in 10 days before the seminar (Monday).    - You will get back a corrected Version the following thursday.    - Hand in the slides 3 days before the seminar.   -   slides and  paper are available electronically one day before your seminar talk.    - You had a least 2 meetings with your advisor before the talk    Your talk will be canceled, if your slides  or paper are not ready  the day before the seminar takes place.   Mailinglist: You can join the mailinglist of the seminar, if you want to get informed about changes in dates etc.