Mongo chicago

Our Adventure With MongoDB, Rails & Friends Mongo Chicago October 2010

Ethan Gunderson http://ethangunderson.com Twitter & Github: ethangunderson

http://gathers.us

Our Agenda 1) gathers.us 2) Why Mongo 3) Choosing an ODM 4) Data modeling 5) Takeaways 6) Q & A

Manage events

Manage your groups (coming soon)

Aggregate your social content (coming soon)

Data needs High Value Low Value Groups Social Events Events RSVPs

Document data model

Read heavy Writes Reads Scaling With MongoDB - 2:45

The real reason I won an argument

Our Agenda 1) gathers.us 2) Why Mongo? 3) Choosing an ODM 4) Data modeling 5) Takeaways 6) Q & A

Rails loves

Lotʼs of options for Rails integration MongoMapper Mongoid MogoDoc Mongomatic Candy

We chose ... The strait Mongo Ruby driver!

ORMs are worthless if you donʼt understand what theyʼre doing.

Simple to use

Learn your tools

We avoided one until it became too painful not to use one.

In the end, we chose Mongoid

Rails 3 support

Nice query syntax

Safe mode

Master / Slave

Rapid development

Our data model

Introducing groups

Option 1

Option 2

YEAH!!

This idea actually sucks

Mongoʼs 4MB 8MB document limit Among other things, it keeps people like us, from doing things like that.

In reality, documents shouldnʼt be bigger than ~250kb Inefﬁcient when... 1) updating on the server 2) transferring across the network 3) serializing to and from BSON

Querying for single events Can’t pull back a single event

Option 3 single collection inheritance

Mongoid Support

Easy querying

Top level objects are still top level objects

Moral of the story is, data modeling is still hard

Takeaways 1) Analyze your data needs 2) Learn the API 3) Data modeling is (still) hard

Our Agenda 1) gathers.us 2) Why Mongo 3) Choosing an ODM(?) 4) Data modeling 5) Takeaways 6) Q & A

Q&A http://spkr8.com/t/4864

Mongo chicago

by Ethan Gunderson on Oct 20, 2010

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Mongo chicago — Presentation Transcript