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Scaling Up Mixed Workloads: A Battle of Data Freshness, Flexibility, and Scheduling

Publications associées (121)

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On the Use of Speech and Face Information for Identity Verification

{T}his report first provides a review of important concepts in the field of information fusion, followed by a review of important milestones in audio-visual person identification and verification. {S}everal recent adaptive and non-adaptive techniques for r ...

IDIAP2004

The Database State Machine Approach

Rachid Guerraoui, André Schiper, Fernando Pedone

Database replication protocols have historically been built on top of distributed database systems, and have consequently been designed and implemented using distributed transactional mechanisms, such as atomic commitment. We present the Database State Mac ...

2003

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

Conflict-Aware Scheduling for Dynamic Content Applications

Willy Zwaenepoel

We present a new lazy replication technique, suitable for scaling the back-end database of a dynamic content site using a cluster of commodity computers. Our technique, called conflict-aware scheduling, provides both throughput scaling and 1-copy serializa ...

2003

Beyond 1-Safety and 2-Safety for Replicated Databases: Group-Safety

André Schiper, Matthias Wiesmann

In this paper, we study the safety guarantees of group communication-based database replication techniques. We show that there is a model mismatch between group communication and database, and because of this, classical group communication systems cannot b ...

2003

Performance Comparison of Middleware Architectures for Generating Dynamic Web Content

Willy Zwaenepoel, Sameh Mohamed Elnikety, Emmanuel Cecchet

On-line services are making increasing use of dynamically generated Web content. Serving dynamic content is more complex than serving static content. Besides a Web server, it typically involves a server-side application and a database to generate and store ...

2003

Group communications and database replication

Matthias Wiesmann

Databases are an important part of today's IT infrastructure: both companies and state institutions rely on database systems to store most of their important data. As we are more and more dependent on database systems, securing this key facility is now a p ...

EPFL2002

Concurrency Control for Transactional Drago

Jörg Kienzle

The granularity of concurrency control has a big impact on the performance of transactional systems. Concurrency control granu- larity and data granularity (data size) are usually the same. The e ect of this coupling is that if a coarse granularity is used ...

Springer Verlag2002

Information Fusion and Person Verification Using Speech & Face Information

This report provides an overview of important concepts in the field of information fusion, followed by a review of literature pertaining to audio-visual person identification & verification. Several recent adaptive and non-adaptive techniques for reaching ...

IDIAP2002

Replication et Durabilité dans les systèmes répartis

Distributed dats bases and data replication are recognised today as an efficient way to increase availability and fiability in data bases. The problem of mutual co-herence of copies is however introduced. Updating data is to be done on all copies. The noti ...

2001