This document discusses 10 reasons to use MongoDB, an open source, cross-platform document-oriented database. It notes that MongoDB is fast, scalable, schema-free, supports rich queries and full indexing. It also supports features like atomic modifiers, replication, auto-sharding, and is easy to try out with small binaries and multi-language drivers. Commercial support is also available.

1. 10 reasons
to fall in love

2. Introduction
NoSQL
MongoDB - humongous
Open source, 10gen
Cross-platform: OS X, Linux, Windows, Solaris
v1.0 – Aug 2009
v1.9.1 – Aug 2011 (odd – DEV version)
v2.0.3 – Feb 2012

3. 1. Fast & powerful
Focus on performance
key/value
Scalability and
stores MongoDB
performance
RDBMS
Depth of functionality

4. 2. Document-oriented
{
_id: <document identifier>,
key: “value”,
subDocument: {innerProp: null}
}
JSON/BSON, 16MB
Basic types, arrays, embedded documents,
ObjectId, other

5. 3. Schema-free
{ ObjectId
_id: ObjectId("4B980A6DEA2C3F4579DA141E"),
user_id: ObjectId("4B980A6DEA2C3F4579DA4F54"), Link to user
shipping_address: {
street: "3333 Green Ave", Embedded
city: "Brooklyn", document
state: "NY"},
line_items: [
{sku: “rbk-423", name: “Case", price: 4000},
{sku: "spk-211", name: "Guitar", price: 9200}], Array
subtotal: 13200, Embedded
tax: 1100, documents
total: 14300
} Duplication

6. 4. Rich queries
db.books.find({name: “MongoDB”});
{author: {$exists: true}, “info.price”: {$lt: 10}}
$gt, $lt, $or, $not, $type, $exists, $in, $all,
$elemMatch
$where – JavaScript expression
db.books.find().skip(50).limit(10).sort({name: 1})

7. 5. Full Index Support
Basic keys, Compound keys
Embedded fields, Arrays
Unique, Sparse, Background
Geospatial indexes (2d)
db.places.find({loc: {$near: [50,50],
$maxDistance: 5}}).limit(20)

8. 6. Useful features
Atomic modifiers ($inc, $set, $push…)
Upsert
FindAndModify
Capped collections
MapReduce
GridFS

9. 7. Replication
Master-Slave Replica Set
M M S
M S
S S S
M M
S M
(Data Center Awareness)

10. 8. Auto-Sharding
Horizontal scalability
AL <= state < KA KA <= state < OH OK <= state <= WY
mongod mongod mongod
mongos
client

11. 9. Easy to try
~50MB of binaries
No installation required
Multi-language support:
C#, C, C++, Java, Perl, PHP, Python, Ruby
Tools: MongoVUE, RockMongo
http://try.mongodb.org

12. 10. Support
Documentation
http://www.mongodb.org
Official MongoDB site
http://groups.google.com/group/mongodb-user
Google user group
Commercial support
MongoDB Monitoring Service (MMS)

13. Questions?