MongoTorino 2013

MongoDB, Development and You

Mitch Pirtle!CTO Sounday Music!www.soundaymusic.com

45 MINUTES?! Let’s get this thing going then.

Speaker Intro

About Me❖ American, living in Turin!❖ CTO at Sounday Music!❖ Mongo Master!❖ Joomla! Founder!❖ Contributor to many FOSS!❖ Family man!❖ Coach (Giaguari Torino)!❖ Musician!❖ Longboarder

Sleeper Check!

Sounday Intro

Sounday in 2013❖ Growing community of music

professionals!

❖ Integrated with many social media platforms!

❖ Very large binary files (audio)!

❖ 100% UGC!

❖ e.commerce B2C, C2C!

❖ Based in Torino!

❖ Engineering based in Cagliari

The Team

Ok, not really.

The Challenge

The Challenge❖ “We’re gunning for a grant”!

❖ (no money yet)!

❖ “It needs to be live soon” !

❖ (zero time)!

❖ “We’re disrupting the industry”!

❖ (no requirements)!

❖ “Wanna move to Cagliari?”

Ok, it’s not really that bad.

Well maybe.

Classic Startup Challenges

❖ Limited budget!

❖ Limited staff!

❖ Limited time!

❖ Zero chance for best practices during development

How I felt when accepting the challenge

How it actually looked

The Solution

The Solution

❖ Single, RESTful base platform (web, mobile, partners)!

❖ Document database!

❖ Store media in database for simplicity, portability!

❖ Ability to break out separate services when scale needed!

❖ Tethered cloud for initial deployment

Solution: The application

Lithium

• Super lightweight PHP framework!• RAD!• MVC!• Promiscuously opinionated!• Post-relational!• Fully leverages PHP 5.3+!• Cherry-picker methodology (mix of

functional, object, aspect, and more)

Solution: The database

MongoDB

• Document database!• GridFS for large binary files!• Scales vertically!• Scales horizontally!• Reduces male pattern baldness

Solution: The approach

Agile, Xtreme

• Quick, iterative steps!• Constant refactoring!• Captured features during

implementation!• Pair programming!• Local, development and production

environments!• Development and production

environments mirrored!• Dedication to DRY

Sleeper Check!

The Good

Lithium saved our bacon

❖ Extremely quick to get bootstrapped and running a base platform!

❖ Many libraries available for specific needs!

❖ Natively talks to non-relational databases!

❖ Intelligent code layout, encourages best practices!

❖ Adapters, filters, this stuff is the shizzle

MongoDB saved our bacon, with eggs

❖ Simple document structure made for extremely simple models!

❖ Better matched with the objects used in our apps!

❖ GridFS made storing media dead simple!

❖ Being schemaless allowed us to iterate rapidly!

❖ After launch, we completely forgot about MongoDB from an operational standpoint

The Bad

The Bad

❖ Hey remember how easy it is to change your document schemas?!

❖ Loosely-typed language and database makes for fun!!

❖ Hope you love the command line. (limited tools)

And lest we not forget…

The Ugly

The Ugly

❖ What do you mean, ‘no need for constraints’?!

❖ Hey this GridFS database is freaking ginormous.!

❖ I’ve never seen that happen before.!

❖ What, there’s no more SQL? Then who’s to blame when something breaks?

What We Learned

❖ Our code was significantly lighter!

❖ This slim codebase is extremely fast!

❖ Smaller codebase == fewer bugs!

❖ GridFS combined with metadata is really powerful!

❖ Atomic documents + working memory = TO INFINITY AND BEYOND!

What Else We Learned

❖ Shift responsibilities from tools to developers!

❖ Testing and documentation are NOT OPTIONAL!

❖ Define models, even when iterating rapidly in a schemaless environment!

❖ Consider backup and operational requirements before you get started

Example Time

User schema, when we started

class Users extends Model { ! //protected $_schema = array() !}

User schema, today protected $_schema = array( '_id' => array('type' => 'id'), 'name' => array('type' => 'string'), 'username' => array('type' => 'string'), 'email' => array('type' => 'string'), 'password' => array('type' => 'string'), 'salt' => array('type' => 'string'), 'facebook_id' => array('type' => 'string'), 'date_created' => array('type' => 'date'), 'registration_source' => array('type' => 'string'), 'active' => array('type' => 'boolean', 'default' => false), // to make sure the account is live 'status' => array('type' => 'string'), 'mvadmin' => array('type' => 'boolean', 'default' => false), 'pufadmin' => array('type' => 'boolean', 'default' => false), 'resetadmin' => array('type' => 'boolean', 'default' => false), 'profile' => array('type' => 'string'), 'avatar' => array('type' => 'string'), 'enabled' => array('type' => 'string'), 'address' => array('type' => 'array'), 'vat' => array('type' => 'string'), 'url' => array('type' => 'string'), 'services' => array('type' => 'array'), 'likes' => array('type' => 'array'), // Polymorphic associations 'moderated' => array('type' => 'boolean'), 'follows' => array('type' => 'array'), 'last_login' => array('type' => 'date'), 'edit_time' => array('type' => 'date'), 'last_ip' => array('type' => 'string'), 'login_counter' => array('type' => 'integer'), 'is_legacy' => array('type' => 'boolean'), 'legacy_id' => array('type' => 'integer'), 'partners' => array('type' => 'array'), );

Database structureactivities_log!admin_bmu_calendars!admin_landing_pages!admin_notifications!artists!banlists!blacklists!blogs!communications!db_logs!engineers!events!fs.chunks!fs.files!galleries!job_applications!job_songs!jobs!

labels!media!messages!news!payments!playlists!sequence!services!sounday_contest_songs!sounday_contest_users!sounday_contest_videos!studios!system.indexes!temp_lookups!tokens!users!venues!videos

One last thing

Behold, the mighty firehose

Whups, not that one

rs0:PRIMARY> db.firehose.stats() { "ns" : "sounday_analytics_prod.firehose", "count" : 3146600, "size" : 10086355648, "avgObjSize" : 3205.4775465581897, "storageSize" : 10830245856, "numExtents" : 26, "nindexes" : 1, "lastExtentSize" : 2146426864, "paddingFactor" : 1, "systemFlags" : 1, "userFlags" : 0, "totalIndexSize" : 113204896, "indexSizes" : { "_id_" : 113204896 }, "ok" : 1 }

Yeah, I said firehose. Got a problem wit dat?

Console time

If you wanted to see this part of the talk, you should have attended the session.!!! ! ! ! :-)

Sleeper Check!

Stump the Speaker

Mitch Pirtle mitch.pirtle@gmail.com http://about.me/mitchitized http://twitter.com/mitchitized http://github.com/spacemonkey

Thank You!