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Apache Solr Search Patterns

By : Jayant Kumar

4.5 (2)

Apache Solr Search Patterns

4.5 (2)

By: Jayant Kumar

Overview of this book

This book is for developers who already know how to use Solr and are looking at procuring advanced strategies for improving their search using Solr. This book is also for people who work with analytics to generate graphs and reports using Solr. Moreover, if you are a search architect who is looking forward to scale your search using Solr, this is a must have book for you. It would be helpful if you are familiar with the Java programming language.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Solr Indexing Internals

1. Solr Indexing Internals

The job site problem statement – Solr indexing fundamentals

Working of analyzers, tokenizers, and filters

Handling a multilingual search

Measuring the quality of search results

The e-commerce problem statement

The job site problem statement

Challenges of large-scale indexing

The SolrCloud solution

Summary

2. Customizing the Solr Scoring Algorithm

2. Customizing the Solr Scoring Algorithm

Relevance calculation

Building a custom scorer

Drawbacks of the TF-IDF model

The information gain model

Implementing the information gain model

Options to TF-IDF similarity

Summary

3. Solr Internals and Custom Queries

3. Solr Internals and Custom Queries

Working of a scorer on an inverted index

Working of OR and AND clauses

The eDisMax query parser

Using BRS queries instead of DisMax

Building a custom query parser

Summary

4. Solr for Big Data

4. Solr for Big Data

Introduction to big data

Getting data points using facets

Radius faceting for location-based data

Data analysis using pivot faceting

Graphs for analytics

Summary

5. Solr in E-commerce

5. Solr in E-commerce

Designing an e-commerce search

Handling unclean data

Handling variations in the product

Sorting

Problems and solutions of flash sale searches

Faceting with the option of multi-select

Faceting with hierarchical taxonomy

Faceting with size

Implementing semantic search

Optimizations

Summary

6. Solr for Spatial Search

6. Solr for Spatial Search

Features of spatial search

Lucene 4 spatial module

Indexing for spatial search

Searching and filtering on a spatial index

Distance sort and relevancy boost

Advanced concepts

Summary

7. Using Solr in an Advertising System

7. Using Solr in an Advertising System

Ad system functionalities

Architecture of an ad distribution system

Requirements of an ad distribution system

Performance improvements

Merging Solr with Redis

Summary

8. AJAX Solr

8. AJAX Solr

The purpose of AJAX Solr

The AJAX Solr architecture

Working with AJAX Solr

Performance tuning

Summary

9. SolrCloud

9. SolrCloud

The SolrCloud architecture

Centralized configuration

Setting up SolrCloud

Distributed indexing and search

Routing documents to a particular shard

Adding more nodes to the SolrCloud

Fault tolerance and high availability in SolrCloud

Advanced sharding with SolrCloud

Asynchronous calls

Migrating documents to another collection

Sizing and monitoring of SolrCloud

Using SolrCloud as a NoSQL database

Summary

10. Text Tagging with Lucene FST

10. Text Tagging with Lucene FST

An overview of FST and text tagging

Implementation of FST in Lucene

Text tagging algorithms

Using Solr for text tagging

Implementing a text tagger using Solr

Summary

Index

Index

Chapter 3. Solr Internals and Custom Queries

In this chapter, we will see how the relevance scorer works on the inverted index. We will understand how AND and OR clauses work in a query and look at how query filters and the minimum match parameter work internally. We will understand how the eDisMax query parser works. We will implement our own query language as a Solr plugin using which we will perform a proximity search. This chapter will give us an insight into the customization of the query logic and creation of custom query parsers as plugins in Solr. This chapter will cover the following topics:

How a scorer works on an inverted index
How OR and AND clauses work
How the eDisMax query parser works
The minimum should match parameter
How filters work
Using Bibliographic Retrieval Services (BRS) queries instead of DisMax
Proximity search using SWAN (Same, With, Adj, Near) queries
Creating a parboiled parser
Building a Solr plugin for SWAN queries
Integrating the SWAN plugin in Solr

CONTINUE READING

83

Tech Concepts

36

Programming languages

73

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