This document is a chapter-by-chapter summary of the book "MongoDB: The Definitive Guide". It covers topics such as getting started with MongoDB, creating, updating and deleting documents, querying, indexing, aggregation, administration, replication and sharding. Example applications discussed include a chemical search engine built with Java, a news aggregator using PHP, a custom form submission application in Ruby, and a real-time analytics application in Python. Additional appendices provide information on installing MongoDB and details about the mongo shell and MongoDB internals.

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MongoDB
The Definitive Guide
Wildan Maulana
wildan.m@openthinklabs.com

2. © 2010, OpenThink Labs. All Rights Reserved
1. Introduction
● A Rich Data Model
● Easy Scaling
● Tons of Features…
● …Without Sacrificing Speed
● Simple Administration
● But Wait, That’s Not All…

3. © 2010, OpenThink Labs. All Rights Reserved
2. Getting Started
● Documents
● Collections
● Schema-Free
● Naming
● Databases
● Getting and Starting MongoDB
● MongoDB Shell
● Running the Shell
● A MongoDB Client
● Basic Operations with the Shell
● Tips for Using the Shell
● Data Types
● Basic Data Types
● Numbers
● Dates
● Arrays
● Embedded Documents
● _id and ObjectIds

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3. Creating, Updating, and Deleting
Documents
● Inserting and Saving Documents
● Batch Insert
● Inserts: Internals and Implications
●
Removing Documents
● Remove Speed
● Updating Documents
● Document Replacement
● Using Modifiers
● Upserts
● Updating Multiple Documents
● Returning Updated Documents
● The Fastest Write This
Side of Mississippi
● Safe Operation
● Catching “Normal”
Errors
● Requests and
Connections

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4. Querying
● Introduction to find
● Specifying Which Keys
to Return
● Limitations
● Query Criteria
● Query Conditionals
● OR Queries
● $not
● Rules for Conditionals
● Type-Specific Queries
● Null
● Regular Expressions
● Querying Arrays
● Querying on Embedded Documents
● $where Queries
● Cursors
● Limits, Skips, and Sorts
● Avoiding Large Skips
● Advanced Query Options
● Getting Consistent Results
● Cursor Internals

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5. Indexing
● Introduction to Indexing
● Scaling Indexes
● Indexing Keys in Embedded
Documents
● Indexing for Sorts
● Uniquely Identifying Indexes
● Unique Indexes
● Dropping Duplicates
● Compound Unique Indexes
● Using explain and hint
● Index Administration
● Changing Indexes
● Geospatial Indexing
● Compound Geospatial
Indexes
● The Earth Is Not a 2D
Plane

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6. Aggregation
● Count
● Distinct
● Group
● Using a Finalizer
● Using a Function as a Key
● MapReduce
● Example 1: Finding All Keys in a Collection
● Example 2: Categorizing Web Pages
● MongoDB and MapReduce

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7. Advanced Topics
● Database Commands
● How Commands Work
● Command Reference
● Capped Collections
● Properties and Use Cases
● Creating Capped Collections
● Sorting Au NaturelTailable Cursors
● GridFS: Storing Files
● Getting Started with GridFS:
mongofiles
● Working with GridFS from the
MongoDB Drivers
● Under the Hood
● Server-Side Scripting
● db.eval
● Stored JavaScript
● Security
● Database References
● What Is a DBRef?
● Example Schema
● Driver Support for DBRefs
● When Should DBRefs Be
Used?

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8. Administration
● Starting and Stopping
MongoDB
● Starting from the Command
Line
● File-Based Configuration
● Stopping MongoDB
● Monitoring
● Using the Admin Interface
● serverStatus
● Mongostat
● Third-Party Plug-Ins
● Security and Authentication
● Authentication Basics
● How Authentication Works
● Other Security Considerations
● Backup and Repair
● Data File Backup
● mongodump and mongorestore
● fsync and Lock
● Slave Backups
● Repair

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9. Replication
● Master-Slave
Replication
● Options
● Adding and Removing
Sources
● Replica Sets
● Initializing a Set
● Nodes in a Replica Set
● Failover and Primary
Election
● Performing Operations on a Slave
● Read Scaling
● Using Slaves for Data Processing
● How It Works
● The Oplog
● Syncing
● Replication State and the Local
Database
● Blocking for Replication
● Administration
● Diagnostics
● Changing the Oplog Size
● Replication with Authentication

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10. Sharding
● Introduction to Sharding
● Autosharding in MongoDB
● When to Shard
● The Key to Sharding: Shard
Keys
● Sharding an Existing Collection
● Incrementing Shard Keys
Versus Random Shard Keys
● How Shard Keys Affect
Operations
● Setting Up Sharding
● Starting the Servers
● Sharding Data
● Production Configuration
● A Robust Config
● Many mongos
● A Sturdy Shard
● Physical Servers
● Sharding Administration
● config Collections
● Sharding Commands

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11. Example Applications
● Chemical Search Engine: Java
● Installing the Java Driver
● Using the Java Driver
● Schema Design
● Writing This in Java
● Issues
● News Aggregator: PHP
● Installing the PHP Driver
● Using the PHP Driver
● Designing the News Aggregator
● Trees of Comments
● Voting
● Custom Submission Forms: Ruby
● Installing the Ruby Driver
● Using the Ruby Driver
● Custom Form Submission
● Ruby Object Mappers and Using
MongoDB with Rails
● Real-Time Analytics: Python
● Installing PyMongo
● Using PyMongo
● MongoDB for Real-Time Analytics
● Schema
● Handling a Request
● Using Analytics Data
● Other Considerations

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A. Installing MongoDB

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B. mongo: The Shell

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C. MongoDB Internals

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Q&A
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