MongoDB, it's not just about big data

mongoDB It’s not just about big data 08.09.2011

what is mongoDB?

“ Scalable, open-source, high-performance, document-oriented database ” - 10gen

Storage model
relational
database
table
row
mongoDB
database
collection
document / object

{ _id: 1234, author: { name: “Bob Davis”, email : [email_address] }, post: “In these troubled times I like to …“, date: { $date: “2010-07-12 13:23UTC” }, location: [ -121.2322, 42.1223222 ], rating: 2.2, comments: [ { user: “jgs32@hotmail.com”, upVotes: 22, downVotes: 14, text: “Great point! I agree” }, { user: “holly.davidson@gmail.com”, upVotes: 421, downVotes: 22, text: “You are a moron” } ] } Documents (a.k.a. Objects)

{ _id: 1234, author: { name: “Bob Davis”, email : [email_address] }, post: “In these troubled times I like to …“, date: { $date: “2010-07-12 13:23UTC” }, location: [ -121.2322, 42.1223222 ], rating: 2.2, comments: [ { user: “jgs32@hotmail.com”, upVotes: 22, downVotes: 14, text: “Great point! I agree” }, { user: “holly.davidson@gmail.com”, upVotes: 421, downVotes: 22, text: “You are a moron” } ], tags: [ “Politics”, “Virginia” ] } Flexible “Schemas”

dynamic queries db.posts.find({ author.name: “mike” }) db.posts.find({ rating: { $gt: 2 }}) db.posts.find({ tags: “Software” }) db.posts.find().sort({date: -1}).limit(10)

query language
Predicates
<, <=, >, >=
$all
$exists
$ne
$in
$nin
$nor
$not
$or
$and
regular expressions
$where (js exps)
group()
** no joins **

indexes db.posts.ensureIndex({ author.name : 1 } db.posts.find({ author.name: “mike” })

geospatial indexing and queries
db.places.ensureIndex( { loc: “2d” } )
db.places.find({ loc: { $near : [50, 50] } }).limit(10)
db.places.find({loc: {$within : {$box : [[40,40],[60,60]]}}})
db.places.find({loc: {$within : {$center : [[40,40],10]}}})

atomic updates Comment c = {author: “will@objectlabs.com”, date: new Date(), text: “great post!”} db.posts.update({_id: post._id}, {$push: {comments: c}})

atomic updates
operators
$set
$unset
$inc
$push
$pushAll
$pull
$pullAll
$bit

aggregation and map/reduce

Native drivers in almost every language
Java
Javascript
Python
Ruby
C#
PHP
and more…

Built for scalability reliability from the ground up

High performance, fault tolerant clusters made easy
Replica sets
Auto-sharding

But, mongoDB is not just about big data

Blog Post

"Object-Relational mapping is the Vietnam of our industry” - Ted Neward

{ _id: 1234, author: { name: “Bob Davis”, email : [email_address] }, post: “In these troubled times I like to …“, date: { $date: “2010-07-12 13:23UTC” }, location: [ -121.2322, 42.1223222 ], rating: 2.2, comments: [ { user: “jgs32@hotmail.com”, upVotes: 22, downVotes: 14, text: “Great point! I agree” }, { user: “holly.davidson@gmail.com”, upVotes: 421, downVotes: 22, text: “You are a moron” } ], tags: [ “Politics”, “Virginia” ] } … vs. this loveliness

mongoDB is a great general purpose database

Good uses for MongoDB
accounts / user profiles
form data
CMS
storing geo-data
application configuration
application logging
…

More info
MongoDB / 10Gen
http://mongodb.org
http://10gen.com
MongoLab
http://mongolab.com
[email_address]

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MongoDB, it's not just about big data

by willshulman on Aug 28, 2011

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