MongoDB Schema Design - MongoDB NYC Meetup

Schema Design With MongoDB NYC MongoDB Meetup Kyle Banker (@hwaet) September 21, 2010 10gen http://www.mongodb.org/ Tuesday, September 21, 2010

The “good kind” of heartbreak... Tuesday, September 21, 2010

Tuesday, September 21, 2010

In this talk: Tuesday, September 21, 2010

In this talk: 1. Intro. Principles. Questions. Tuesday, September 21, 2010

In this talk: 1. Intro. Principles. Questions. 2. Using rich documents Tuesday, September 21, 2010

In this talk: 1. Intro. Principles. Questions. 2. Using rich documents 3. Simplifying relations Tuesday, September 21, 2010

In this talk: 1. Intro. Principles. Questions. 2. Using rich documents 3. Simplifying relations 4. Embed vs. Reference Tuesday, September 21, 2010

In this talk: 1. Intro. Principles. Questions. 2. Using rich documents 3. Simplifying relations 4. Embed vs. Reference 5. Patterns Tuesday, September 21, 2010

1. MongoDB Tuesday, September 21, 2010

MongoDB in Production Tuesday, September 21, 2010

try.mongodb.org Tuesday, September 21, 2010

Design goals... Tuesday, September 21, 2010

key-‐value stores Tuesday, September 21, 2010

key-‐value stores relational databases Tuesday, September 21, 2010

An analogy: Tuesday, September 21, 2010

Raw materials... Tuesday, September 21, 2010

http://www.ﬂickr.com/photos/talkephotography/3968348 Tuesday, September 21, 2010

And our tools... Tuesday, September 21, 2010

http://www.ﬂickr.com/photos/pjh/187636444/ Tuesday, September 21, 2010

And what we’re building. Tuesday, September 21, 2010

http://www.ﬂickr.com/photos/pjh/187636444/ Tuesday, September 21, 2010

Raw materials Tuesday, September 21, 2010

Raw materials Binary blobs Tuesday, September 21, 2010

Raw materials Binary blobs Tables and rows Tuesday, September 21, 2010

Raw materials Binary blobs Tables and rows Columns Tuesday, September 21, 2010

Raw materials Binary blobs Tables and rows Columns CSVs Tuesday, September 21, 2010

Raw materials Binary blobs Tables and rows Columns CSVs BSON Documents Tuesday, September 21, 2010

Tools Tuesday, September 21, 2010

Tools SQL Tuesday, September 21, 2010

Tools SQL Dynamic queries Tuesday, September 21, 2010

Tools SQL Dynamic queries Secondary indexes Tuesday, September 21, 2010

Tools SQL Dynamic queries Secondary indexes Atomic updates Tuesday, September 21, 2010

Tools SQL Dynamic queries Secondary indexes Atomic updates Map-‐Reduce Tuesday, September 21, 2010

$or Tuesday, September 21, 2010

What we’re building Tuesday, September 21, 2010

What we’re building Read-‐ or write-‐heavy Tuesday, September 21, 2010

What we’re building Read-‐ or write-‐heavy Update frequency Tuesday, September 21, 2010

What we’re building Read-‐ or write-‐heavy Update frequency Aggregation Tuesday, September 21, 2010

2. Rich Documents Tuesday, September 21, 2010

What can we do with rich documents? Tuesday, September 21, 2010

Queries Tuesday, September 21, 2010

Atomic Updates Tuesday, September 21, 2010

Map-‐Reduce Tuesday, September 21, 2010

Rich document advantages: Tuesday, September 21, 2010

Rich document advantages: Holistic representation. Tuesday, September 21, 2010

Rich document advantages: Holistic representation. Still easy to manipulate. Tuesday, September 21, 2010

Rich document advantages: Holistic representation. Still easy to manipulate. Pre-‐joined for fast retrieval. Tuesday, September 21, 2010

3. Simpliﬁed Relations Tuesday, September 21, 2010

Tags Tuesday, September 21, 2010

Votes Tuesday, September 21, 2010

Adding a vote Tuesday, September 21, 2010

Finding all votes for a given user Tuesday, September 21, 2010

4. Embed vs. Reference Tuesday, September 21, 2010

post -‐> many comments Relational model: post comments post_id user_id tree attrs Tuesday, September 21, 2010

1. Embedded Document Tuesday, September 21, 2010

2. Embedded and Nested Document Tuesday, September 21, 2010

3. Normalized Collection Tuesday, September 21, 2010

Use Cases 1. Embedded document Fast queries Document always appears w/ parent. Tuesday, September 21, 2010

Use Cases 1. Embedded document Fast queries Document always appears w/ parent. 2. Embedded & nested document Complex hierarchies Document appears with parent Tuesday, September 21, 2010

Use Cases 1. Embedded document Fast queries Document always appears w/ parent. 2. Embedded & nested document Complex hierarchies Document appears with parent 3. Normalized Maximum ﬂexibility. Simpliﬁed global updates. Tuesday, September 21, 2010

5. Patterns Tuesday, September 21, 2010

I. Analytics Tuesday, September 21, 2010

Use many collections Tuesday, September 21, 2010

A pageview document Tuesday, September 21, 2010

Upsert Tuesday, September 21, 2010

The right index Tuesday, September 21, 2010

Aggregate - map Tuesday, September 21, 2010

Aggregate - reduce Tuesday, September 21, 2010

MapReduce with filter Tuesday, September 21, 2010

II. E-commerce Tuesday, September 21, 2010

Products As rich documents Tuesday, September 21, 2010

Products and Categories Using indexed array keys Tuesday, September 21, 2010

Products and Categories Tuesday, September 21, 2010

Products and Categories (Alternative) Tuesday, September 21, 2010

Wish lists As embedded documents Tuesday, September 21, 2010

Product reviews Normalized, rich documents Tuesday, September 21, 2010

6. Summary Tuesday, September 21, 2010

Schema Design Tuesday, September 21, 2010

Schema Design 1. There’s more than one way Tuesday, September 21, 2010

Schema Design 1. There’s more than one way 2. Use rich documents Tuesday, September 21, 2010

Schema Design 1. There’s more than one way 2. Use rich documents 3. Simplify relations Tuesday, September 21, 2010

Schema Design 1. There’s more than one way 2. Use rich documents 3. Simplify relations 4. Embed vs. Reference Tuesday, September 21, 2010

Schema Design 1. There’s more than one way 2. Use rich documents 3. Simplify relations 4. Embed vs. Reference 5. Patterns are emerging Tuesday, September 21, 2010

Shameless Plugs Tuesday, September 21, 2010

Shameless Plugs 1. 10gen in hiring. Tuesday, September 21, 2010

Shameless Plugs 1. 10gen in hiring. 2. MongoDB in Action. Tuesday, September 21, 2010

Thank You http://www.mongodb.org/ Tuesday, September 21, 2010

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MongoDB Schema Design - MongoDB NYC Meetup

by Kyle Banker on Sep 21, 2010

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MongoDB Schema Design - MongoDB NYC Meetup — Presentation Transcript