This post originated from an RSS feed registered with Java Buzz by Weiqi Gao. Original Post: Java News Brief (JNB): Getting To Know Berkeley DB Java Edition Feed Title: Weiqi Gao's Weblog Feed URL: http://www.weiqigao.com/blog/rss.xml Feed Description: Sharing My Experience... Latest Java Buzz Posts Latest Java Buzz Posts by Weiqi Gao Latest Posts From Weiqi Gao's Weblog

This months Java News Bried (JNB) features well-known member of the Java blogging community Weiqi Gao getting to know Berkeley DB Java Edition:

Weiqi Gao: When thinking about databases, the first thing that comes to a Java developer's mind is probably relational database servers. These servers have a communications layer that allows a remote application to connect to the database process, a SQL compiler that understands and executes SQL queries from the application, and an interactive shell that allows users and administrators to perform ad hoc queries. Berkeley DB Java Edition has none of these.

What it does have is a transaction engine that offers full ACID (Atomicity, Consistency, Isolation and Durability) semantics, an in-memory cache that manages the data using B+trees, and a persistence engine that writes log files to local disks. Everything Berkeley DB Java Edition does happens inside the same JVM instance where the application is hosted. In other words, the database is embedded within the application process as a jar file in the classpath.

These characteristics makes Berkeley DB Java Edition uniquely suitable for a wide class of applications that does not require the additional features from a full-fledged relational database server. These applications tend to have a relatively stable and small data schema, a very dynamic but usually bounded data set, and high throughput requirements.