MongoDB (is) For Rubyists - Boston Ruby

Intro Wednesday, December 9, 2009

Q. Why do we love Ruby? Wednesday, December 9, 2009

A. “Ruby is designed to be human-oriented. It reduces the burden of programming. It tries to push jobs back to machines. You can accomplish more tasks with less work, in smaller yet readable code.” - Matz Wednesday, December 9, 2009

01001000011101010110 11010110000101101110 0111011001110011 01001101011000010110 00110110100001101001 0110111001100101 Wednesday, December 9, 2009

Human vs Machine Wednesday, December 9, 2009

Q. Why do I love MongoDB? Wednesday, December 9, 2009

A. “MongoDB is designed to be human-oriented. It reduces the burden of programming. It tries to push jobs back to machines. You can accomplish more tasks with less work, in smaller yet readable code.” - Banker (indebted to Matz) Wednesday, December 9, 2009

MongoDB (is) for Rubyists * * and all human-oriented programmers Wednesday, December 9, 2009

1. SQL (or No) Wednesday, December 9, 2009

Key/Value Stores Dynamo, Voldemort, Redis, Memcached (keyword: “stores”) Wednesday, December 9, 2009

Column-Oriented Cassandra, BigTable Wednesday, December 9, 2009

Document Databases MongoDB, CouchDB Wednesday, December 9, 2009

RDBMS Durable Transactional Normalized Rigorous Queryable (deeply) Wednesday, December 9, 2009

Wednesday, December 9, 2009

Notes: RDBMS is proven necessary * *sometimes Wednesday, December 9, 2009

Why build MongoDB? Wednesday, December 9, 2009

Mean & Extremes Key-Value MongoDB Relational Wednesday, December 9, 2009

MongoDB high-performance built for scale document-oriented schema-free Wednesday, December 9, 2009

high performance relaxed acid document model memory-mapped Wednesday, December 9, 2009

master-slave M S S S Wednesday, December 9, 2009

replica-pairs M (S) S (M) M (S) S (M) M (S) S (M) Wednesday, December 9, 2009

(auto) sharding Wednesday, December 9, 2009

client Wednesday, December 9, 2009

mongos client Wednesday, December 9, 2009

Shards mongod mongod mongod mongod mongod mongod mongos client Wednesday, December 9, 2009

Shards mongod mongod mongod Conﬁg mongod mongod mongod Servers mongod mongod mongod mongos client Wednesday, December 9, 2009

Shards mongod mongod mongod ... Conﬁg mongod mongod mongod Servers mongod mongod mongod mongos mongos ... client Wednesday, December 9, 2009

document-oriented {:sku => ‘637636’, :name => ‘Linen tailored pant’, :about => [{:title => ‘fabric & care’, :content => [‘Dry clean’, ‘Imported’]}, {:title => ‘overview’, :content => [‘Tailored fit’, ‘Yarn dyed’]} ] } Wednesday, December 9, 2009

schema-free {:sku => ‘637636’, :note => ‘Added this with no migration!” :name => ‘Linen tailored pant’, :about => [{:title => ‘fabric & care’, :content => [‘Dry clean’, ‘Imported’]}, {:title => ‘overview’, :content => [‘Tailored fit’, ‘Yarn dyed’]} ] Wednesday, December 9, 2009

Q. How many times have you typed this? Wednesday, December 9, 2009

Q. How many times have you typed this? rake db:migrate Wednesday, December 9, 2009

Q. How do you make an RDBMS dynamic? Wednesday, December 9, 2009

A. Hundreds of little tables. Wednesday, December 9, 2009

Simulating a ﬂexible schema Wednesday, December 9, 2009

Simulating a ﬂexible schema What’s the join like? Wednesday, December 9, 2009

Simulating a ﬂexible schema What’s the join like? Can we reason about it? Wednesday, December 9, 2009

Q. What % of these tables could be better represented as documents? Wednesday, December 9, 2009

Machine Wednesday, December 9, 2009

human Wednesday, December 9, 2009

{:sku => ‘637636’, :name => ‘Linen tailored pant’, :about => [{:title => ‘fabric & care’, :content => [‘Dry clean’, ‘Imported’]}, {:title => ‘overview’, :content => [‘Tailored ﬁt’, ‘Yarn dyed’]} ] }* * Admittedly simplified, but not far-fetched. Wednesday, December 9, 2009

2. Ruby to MongoDB Wednesday, December 9, 2009

Anatomy of an Insert Wednesday, December 9, 2009

Connection mongod (or mongos) Database a database Collection a schema-free table Wednesday, December 9, 2009

ObjectID Generation BSON Serialization Fire and Forget Wednesday, December 9, 2009

Dynamic Queries * * like sql Wednesday, December 9, 2009

b-tree Indexes * * up to 40 per collection Wednesday, December 9, 2009

Flexible & Fast Updates * * and upserts, too Wednesday, December 9, 2009

Elegant Operators * * document keywords Wednesday, December 9, 2009

for queries $ne $in $nin $mod $all $size $exists Wednesday, December 9, 2009

for updates $inc $set $push $pushAll $pop $pull $pullAll Wednesday, December 9, 2009

for everything else: Javascript * * yes, MongoDB speaks JS Wednesday, December 9, 2009

group where map-reduce Wednesday, December 9, 2009

3. Design Patterns Wednesday, December 9, 2009

One to y Many Many Many Man any Many Many Many any Many Many Many M Many Many Many Many Wednesday, December 9, 2009

comments has_many votes Wednesday, December 9, 2009

relation comments votes comment_id user_id Wednesday, December 9, 2009

document comments Wednesday, December 9, 2009

post has_many comments Wednesday, December 9, 2009

relation post comments post_id user_id tree attrs Wednesday, December 9, 2009

1. embedded document {:title => ‘a life unexamined’, :comments => [ {:author => ‘socrates’, :text => ‘is not worthwhile’}, {:author => ‘epicurus’, :text => ‘leads to bliss’} ] } Wednesday, December 9, 2009

2. embedded & nested {:comments => [ {:author => ‘socrates’, :text => ‘is not worthwhile’, :comments => [ {:author => ‘epicurus’, :text => ‘leads to bliss’}]}, ] } Wednesday, December 9, 2009

3. normalized [{:author => ‘socrates’, :text => ‘is not worthwhile’, :post_id => ‘4c4fa6d000002’}, {:author => ‘epicurus’, :text => ‘leads to bliss’, :post_id => ‘4c4fa6d000002’} ] Wednesday, December 9, 2009

Embed relationships tightly-bound concepts tradeoﬀs Break out ﬁrst-class docs independent concepts Wednesday, December 9, 2009

any Many Many Many any Many Many Many M Many Many Many Many to y Many Many Many Man any Many Many Many ny Many Many Many M Many Many Many Many Wednesday, December 9, 2009

relation clients join client_id address_id addresses Wednesday, December 9, 2009

document Wednesday, December 9, 2009

Den o malization r { :username => ‘socrates’, :text => ‘...be as you wish’, :user_id => ‘4c4fa6d000002’ } Wednesday, December 9, 2009

Exercises for the coder Wednesday, December 9, 2009

GridFS for images, videos, music, large binary objects Wednesday, December 9, 2009

MongoDB JS Shell MongoMapper Wednesday, December 9, 2009

MongoDB JS Shell MongoMapper Pre-compiled binaries Thorough documentation Multi-language support Wednesday, December 9, 2009

Outro Wednesday, December 9, 2009

Q. What is MongoDB good for? Wednesday, December 9, 2009

A. the web real-time logging analytics Wednesday, December 9, 2009

A. the web real-time logging analytics clear path to scalability comprehensible data models Wednesday, December 9, 2009

A. the web real-time logging analytics clear path to scalability comprehensible data models human-oriented programmers Wednesday, December 9, 2009

google groups: mongodb-user freenode: #mongodb docs & download: mongodb.org twitter.com/hwaet kyle@10gen.com inspired by slideshare.net/timanglade/tin Wednesday, December 9, 2009

http://kylebanker.com	9511
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http://localhost	141
http://www.slideshare.net	72
http://nosql.mypopescu.com	31
http://localhost-readerhero.dev	26
http://xbora.tv	8
http://blog.shrt.nl	7
http://translate.googleusercontent.com	4
http://reader.code-laboratory.com	4
http://www.tinkrbox.com:8080	1
http://drizzlin.com	1
http://mongo.kylebanker.com	1
http://edifu22.blogspot.com	1
http://localhost:4331	1
http://tech.lezi.com} {363774458\|\|\|pingback	1
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MongoDB (is) For Rubyists - Boston Ruby

by Kyle Banker on Dec 09, 2009

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MongoDB (is) For Rubyists - Boston Ruby — Presentation Transcript