Why I Hate DjangoCal Henderson

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O HAI

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My happy face

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2.8 billion photos

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2.8 billion photos

1 per 2.3 people on earth

9.2 per US resident

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35k photos/sec

>2m photos/min

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Many thousand pages/sec

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Scale nerd

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Serious Language

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Yahoo

FacebookMediawiki

Wordpress

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Yahoo

FacebookMediawiki

Wordpress

DiggDelicious

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Flamework

Serious Toolset

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Flamework

Flint

Flinderbox

Flaux

Flag

Flink

Flotos

Flictionary

Flops

Fleng

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Why hate Django?

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What does he even know

about Django?

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Pownce

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A fucking blogging engine

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Why all the hate?

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An attack on several fronts

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An attack on several fronts

The team

Python

Frameworks

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Django itself

Performance

Scalability

Maintainability

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The Team

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Frameworks

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Struts

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Craig McClanahan

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Exhibit A : Beard

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But Struts is for suits!

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The Hot Shit

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Rails = Badass

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Instead?

A boy band?

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DjangoCore

The Album

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Simon “Stinky” Willison

Also, a wizard

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Python

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Trendy

Google!

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But not that trendy

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But not that trendy

It’s no ruby

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But not that trendy

It’s no ruby

Or Haskell

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But not that trendy

It’s no ruby

Or Erlang

Or Haskell

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But not that trendy

It’s no ruby

Or ErlangOr Scala

Or Haskell

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Significant Whitespace

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Salmon

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Universe of marshy force. Field sense

shallows the hatchery saying Hello,. World!.

Hydro. Power spring sometimes; snowmelt

powers snowmelt always.

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No quantum

superpositions

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“-”.join(array)

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Restarting the server?

WTF!?

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WSGIReloadMechanism

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“I buy my eggs at the cheese shop”- Aaron Straup Cope

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“I buy my eggs at the cheese shop”- Aaron Straup Cope

[MOON L

ANGUAGE]

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__import__()

from future import awesome

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Basically, for hippies

OO languages

Scared of real

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Frameworks

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Flamework is a framework

But what does that mean?

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Make common tasks:

faster

easier

error-free

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Show a list of photos

Write an API method

Kill all humans

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Front-tier frameworks

Act as glue

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Data store

Business

Logic

Interaction

LogicTemplates

Request

Dispatcher

Users

Other

Services

Data Model

Framework

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Great for getting started

Slows you down later?

What is it doing in there?

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Fast

Flexible

Easy

Scalable

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Large scale

is often not a good goal

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Skyscrapers are special

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Regular houses

Don’t need 10 story foundations

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Just build!

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Everything here is possible!

We care about easy

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Large Scale

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No multiple DB clusters

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Manual partitioning

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No multiple hosts per DB

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Where do we read from?

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How about now?

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How about now ?

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Read/write consistency

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Read/write consistency

LAG!!1

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Good for non-writing users

(logged out)

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Non time-sensitive data

Feeds

Read-only APIs

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Cool kids use

master/master pairs

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Consistent read/write

1. Write to side A

2. Read from side B

3. Replication occurs

4. FAIL

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Consistent read/write

1. Write to side A

2. Read from side A

3. ???

4. PROFIT!!

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Then we can start to get fancy!