LDI Docs – 1 Introduction

1 Introduction

General introduction, features, benefits and comparison with Lucene standalone implementation and Oracle Text.

1.1 What is Lucene

Apache Lucene is a high-performance, full-featured text search engine library written entirely in Java. It is a technology suitable for nearly any application that requires full-text search, especially cross-platform.
Apache Lucene is an open source project available for free download.
If Lucene is a pure Java framework why not use it inside Oracle Database JVM environment?

1.2 What is Lucene Domain Index

Lucene Domain Index is full integration of Lucene project running inside the Oracle database using Oracle JVM. Oracle provides a full featured JVM inside your Oracle Database compliant with JDK 1.4 in 10g release and 1.5 in 11g.
OJVMDirectory is a replacement for Lucene’s file system storage by a BLOB based storage, the name is related to the class which overrides (Directory.java)