MG4J: The Manual

Table of Contents

1. A Quick Tour of MG4J

Building your first index

Building a compressed collection

More options

Querying MG4J

More sophisticated queries

A semantic index

A TREC index

2. Behind the scenes: The indexing process

Introduction

Preamble: terms, dictionaries and term-related maps

Scan: Building batches

Time/space requirements

Combining batches

Splitting indices

Virtual fields in MG4J

Virtual fields and virtual fragments

Document resolvers

What is a document resolver actually doing: virtual texts and gaps

Payload-based indices

3. Performance

Indexing Time

Setting up the index structure

Setup Time

Query Time

4. Clusters & Partitioning

Documental vs. Lexical

Partitioning vs. Clustering

Creating a Cluster

5. Accessing MG4J indices programmatically