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Query management system and engine allowing for efficient query execution on raw details

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Adaptive Physical Design for Curated Archives

Anastasia Ailamaki, Debabrata Dash

We introduce AdaptPD, an automated physical design tool that improves database performance by continuously monitoring changes in the workload and adapting the physical design to suit the incoming workload. Current physical design tools are offline and requ ...

2009

Deferred-update database replication

Rodrigo Malta Schmidt

This thesis is about the design of high-performance fault-tolerant computer systems. More specifically, it focuses on how to develop database systems that behave correctly and with good performance even in the event of failures. Both performance and depend ...

EPFL2008

To Share or Not To Share?

Anastasia Ailamaki, Babak Falsafi, Frederick Ryan Johnson, Ippokratis Pandis

Intuitively, aggressive work sharing among concurrent queries in a database system should always improve performance by eliminating redundant computation or data accesses. We show that, contrary to common intuition, this is not always the case in practice, ...

2007

Degradation Processes and Wear of Railway Switches and Crossings: The Swiss Experience

Willem-Jan Zwanenburg

Using databases of the Swiss Federal Railways (SBB), statistical analyses are carried out on the expected lifetime of railway switches (points) and crossings (components). They are attributed to different parameters which influence the speed of degradation ...

2007

Queryll: Java Database Queries through Bytecode Rewriting

Willy Zwaenepoel, Christopher Ming-Yee Iu

When interfacing Java with other systems such as databases, programmers must often program in special interface languages like SQL. Code written in these languages often needs to be embedded in strings where they cannot be error-checked at compile-time, or ...

2006

An Extensible Query Execution Engine for Supporting New Query Execution Models

Query processing in traditional Database Management Systems (DBMS) has been extensively studied in the literature and adopted in industry. Such success is, in part, due to the performance of their Query Execution En-gines (QEE) for supporting the execution ...

2005

A Multimodal Database Framework for Multimedia Meeting Annotations

Stefano Spaccapietra, Hassina Bounif, Oleksandr Drutskyy

The main objective of this paper is to present a flexible annotation management framework for a multimedia database system, applied to meeting recordings. Presented research and development activities are carried out within the scope of the IM2 project in ...

2004

Using Code Transformation for Consistent and Transparent Caching of Dynamic Web Content

Willy Zwaenepoel, Sumit Mittal

We present a consistent and transparent caching system for dynamic web pages produced by a server-side application using a back-end database. Cached pages always reflect current database values. No intervention from the programmer is necessary to implement ...

2003

Building 3D anatomical scenes on the Web

Roger Hersch, Sebastian Gerlach

We propose a new service for building user-defined 3D anatomical structures on the Web. The Web server is connected to a database storing more than 1000 3D anatomical models reconstructed from the Visible Human. Users may combine existing models as well as ...

Wiley2002