Publications related to H2O: A Hands-free Adaptive Store

Compression with Graphical Constraints: An Interactive Browser

We study the problem of navigating/searching through a database of objects with potentially different popularities using a membership oracle. The membership oracle, given a subset of objects

A

, and a target object

t

, determines whether

A

contains

t

...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2011

Here are my Data Files. Here are my Queries. Where are my Results?

Anastasia Ailamaki, Frederick Ryan Johnson, Ioannis Alagiannis

Database management systems (DBMS) provide incredible flexibility and performance when it comes to query processing, scalability and accuracy. To fully exploit DBMS features, however, the user must define a schema, load the data, tune the system for the ex ...

2011

Database Queries in Java

Christopher Ming-Yee Iu

In conventional programming languages like Java, the interface for accessing databases is often inelegant. Typically, an entire separate database query language must be embedded inside a conventional programming language for programmers to access the full ...

EPFL2010

Reasoning with large ontologies stored in relational databases: The OntoMinD approach

Stefano Spaccapietra, Christine Parent

A major obstacle to the development of ontologies in support of the Semantic Web is the poor capability of current ontology techniques to handle very large ontologies, in particular regarding scalability of reasoners. This paper builds on the assumption th ...

2010

Improving OLTP Concurrency through Early Lock Release

Anastasia Ailamaki, Frederick Ryan Johnson, Manoussos Gavriil Athanassoulis, Radu Ioan Stoica

Since the beginning of the multi-core era, database systems research has restarted focusing on increasing concurrency. Even though database systems have been able to accommodate concurrent requests, the exploding number of available cores per chip has surf ...

2009

DBToaster: A SQL Compiler for High-Performance Delta Processing in Main-Memory Databases

Christoph Koch, Yanif Ahmad

We present DBToaster, a novel query compilation framework for producing high performance compiled query executors that incrementally and continuously answer standing aggregate queries using in-memory views. DBToaster targets applications that require effic ...

2009

Sharing of probabilistically correlated data in peer-to-peer networks

Roman Schmidt

The impact of Peer-to-Peer (P2P) networks on the Internet landscape is undisputed. It has led to a series of new applications, e.g., as part of the so-called Web 2.0. The shift from the classical client-server based paradigm of the Internet, with a clear d ...

EPFL2008

Critical Sections: Re-Emerging Scalability Concerns for Database Storage Engines

Anastasia Ailamaki, Frederick Ryan Johnson, Ippokratis Pandis

Critical sections in database storage engines impact performance and scalability more as the number of hardware contexts per chip continues to grow exponentially. With enough threads in the system, some critical section will eventually become a bottleneck. ...

2008

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

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

H2O: A Hands-free Adaptive Store

Graph Chatbot

Chat with Graph Search

Compression with Graphical Constraints: An Interactive Browser

Here are my Data Files. Here are my Queries. Where are my Results?

Database Queries in Java

Reasoning with large ontologies stored in relational databases: The OntoMinD approach

Improving OLTP Concurrency through Early Lock Release

DBToaster: A SQL Compiler for High-Performance Delta Processing in Main-Memory Databases

Sharing of probabilistically correlated data in peer-to-peer networks

Critical Sections: Re-Emerging Scalability Concerns for Database Storage Engines

To Share or Not To Share?

An Extensible Query Execution Engine for Supporting New Query Execution Models

Here are my Data Files. Here are my Queries. Where are my Results?

Compression with Graphical Constraints: An Interactive Browser

DBToaster: A SQL Compiler for High-Performance Delta Processing in Main-Memory Databases

Sharing of probabilistically correlated data in peer-to-peer networks

Reasoning with large ontologies stored in relational databases: The OntoMinD approach

Improving OLTP Concurrency through Early Lock Release

Database Queries in Java

Critical Sections: Re-Emerging Scalability Concerns for Database Storage Engines

To Share or Not To Share?

An Extensible Query Execution Engine for Supporting New Query Execution Models