Share
Embed
Slide 1
Slide 1 text
歓喜に寄せて
Slide 2
Slide 2 text
» MongoDB is our only data store
(technically, S3 is our other store)
January 2011
Slide 3
Slide 3 text
» How do you plan to query your data?
Slide 4
Slide 4 text
» N-Gram Search
https://github.com/artsy/mongoid_fulltext
class Artist
include Mongoid::Document
include Mongoid::FullTextSearch
field :first_name
field :last_name
def name
[first_name, last_name].join(' ')
end
fulltext_search_in :name
end
Slide 5
Slide 5 text
~ 50 of 850 genes
MongoDB: A Sparse Hash
{
Contemporary : 100,
Computer Art : 20,
Plays With Scale: 80,
Humor : 70,
Nostalgia : 0,
Hairy or Fluffy : 0
}
Slide 6
Slide 6 text
MongoDB: Inheritance in the Database
{
_type : SoloArtist,
birthday : 1929,
deathday : 1972
}
{
_type : ArtCollective
founded : 1929
}
Slide 7
Slide 7 text
MongoDB: Cartesian Product
{
id : BSON::ObjectId(…)
color : red,
medium : works-on-paper,
size : small,
price : [0, 12, 48],
}
Slide 8
Slide 8 text
MongoDB: from LSH to K-Most Similar Graph
{
artwork_id : BSON::ObjectId(…)
neighbors : [[ BSON::ObjectId(…), score ], … ]
}
http://www.mit.edu/~andoni/LSH/
http://www.cs.princeton.edu/cass/papers/www11.pdf
Slide 9
Slide 9 text
No content
Slide 10
Slide 10 text
class User
include Mongoid::Document
field :account_created, default: false
has_many :authentications
def account_created?
account_created || authentications.any?
end
end
task :migrate do
User.where({ :account_created.exists => false }).each do |user|
user.update_attributes!({ account_created: user.account_created? })
end
end
Slide 11
Slide 11 text
Shard?
Slide 12
Slide 12 text
REST API
as little online
processing as
possible
as much offline
parallel processing
as possible
iPad
CMS
Web
Slide 13
Slide 13 text
» Mongoid Collection Snapshot
https://github.com/aaw/mongoid_collection_snapshot
as much offline
parallel processing
as possible
Slide 14
Slide 14 text
Denormalize?
https://github.com/logandk/mongoid_denormalize
https://github.com/dzello/mongoid_alize
Slide 15
Slide 15 text
» Mongoid Cached JSON
https://github.com/dblock/mongoid-cached-json
REST API
class Widget
include Mongoid::CachedJson
field :name
has_many :gadgets
json_fields \
:name => { },
:gadgets => {
:type => :reference,
:properties => :public
}
end
Slide 16
Slide 16 text
Throw Birds?
Slide 17
Slide 17 text
rpm_contrib 2.1.9
newrelic_rpm 3.3.3
https://github.com/newrelic/rpm_contrib/pull/16
Slide 18
Slide 18 text
testing models and APIs will save your life
class User
include Mongoid::Document
end
class Admin < User
end
class Representative
include Mongoid::Document
belongs_to :user, inverse_of: :representative
belongs_to :admin , inverse_of: nil
end
Slide 19
Slide 19 text
• mongoid-history
• carrierwave-mongoid
• mongoid_fulltext
• mongoid_slug
• delayed_job_mongoid
• mongoid_collection_snapshot
• delayed_job_shallow_mongoid
• mongoid-cached-json
Slide 20
Slide 20 text
No content
Slide 21
Slide 21 text
Local MongoDB
sudo rm /var/lib/mongodb/mongod.lock
Heroku MongoDB small
Heroku MongoDB shared replica set
MongoHQ dedicted replica set
Slide 22
Slide 22 text
MongoHQ
Heroku
Heroku & Local
mongodump
mongodump
http://code.dblock.org/a-rake-task-for-copying-mongodb-databases
Slide 23
Slide 23 text
» $15 - $49 per developer / month
» 149$ / month for a Small Replica Set
» $1345 / month for a Large Replica Set
--------
~ 25K$ / year on database hosting
Slide 24
Slide 24 text
art.sy:
http://art.sy
twitter:
@dblockdotorg
blog:
http://code.dblock.org
email:
[email protected]
slides on slideshare:
http://slideshare.net/dblockdotorg