In this article, we survey recent research on column-oriented database systems, or column-
stores, where each attribute of a table is stored in a separate file or region on storage. Such …

In many important applications—such as search engines and relational database systems—
data are stored in the form of arrays of integers. Encoding and, most importantly, decoding of …

DB2 with BLU Acceleration deeply integrates innovative new techniques for defining and
processing column-organized tables that speed read-mostly Business Intelligence queries …

MapReduce-based data warehouse systems are playing important roles of supporting big
data analytics to understand quickly the dynamics of user behavior trends and their needs in …

In-memory tree structured index search is a fundamental database operation. Modern
processors provide tremendous computing power by integrating multiple cores, each with …

Invented about 40 years ago and called ubiquitous less than 10 years later, B-tree indexes
have been used in a wide variety of computing systems from handheld devices to …

The availability of huge system memory, even on standard servers, generated a lot of
interest in main memory database engines. In data warehouse systems, highly compressed …

Internet of Things (IoT) is a promising technology to provide product traceability for industrial
systems. By using sensing and networking techniques, an IoT-enabled industrial system …

Query performance in current systems depends significantly on tuning: how well the query
matches the available indexes, materialized views etc. Even in a well tuned system, there …

Although flash storage has largely replaced hard disks in consumer class devices,
enterprise workloads pose unique challenges that have slowed adoption of flash …