why i hate django - part 1/2

Why I Hate DjangoCal Henderson

DjangoCon 2008 2

O HAI

DjangoCon 2008 3

My happy face

DjangoCon 2008 4

DjangoCon 2008 5

2.8 billion photos

DjangoCon 2008 6

2.8 billion photos

1 per 2.3 people on earth

9.2 per US resident

DjangoCon 2008 7

35k photos/sec

>2m photos/min

DjangoCon 2008 8

Many thousand pages/sec

DjangoCon 2008 9

Scale nerd

DjangoCon 2008 10

Serious Language

DjangoCon 2008 11

Yahoo

FacebookMediawiki

Wordpress

DjangoCon 2008 12

Yahoo

FacebookMediawiki

Wordpress

DiggDelicious

DjangoCon 2008 13

Flamework

Serious Toolset

DjangoCon 2008 14

Flamework

Flint

Flinderbox

Flaux

Flag

Flink

Flotos

Flictionary

Flops

Fleng

DjangoCon 2008 15

Why hate Django?

DjangoCon 2008 16

What does he even know

about Django?

DjangoCon 2008 17

Pownce

DjangoCon 2008 18

A fucking blogging engine

DjangoCon 2008 19

Why all the hate?

DjangoCon 2008 20

DjangoCon 2008 21

DjangoCon 2008 22

DjangoCon 2008 23

DjangoCon 2008 24

An attack on several fronts

DjangoCon 2008 25

An attack on several fronts

The team

Python

Frameworks

DjangoCon 2008 26

Django itself

Performance

Scalability

Maintainability

DjangoCon 2008 27

The Team

DjangoCon 2008 28

Frameworks

DjangoCon 2008 29

Struts

DjangoCon 2008 30

Craig McClanahan

DjangoCon 2008 31

DjangoCon 2008 32

Exhibit A : Beard

DjangoCon 2008 33

But Struts is for suits!

DjangoCon 2008 34

The Hot Shit

DjangoCon 2008 35

DjangoCon 2008 36

Rails = Badass

DjangoCon 2008 37

Instead?

A boy band?

DjangoCon 2008 38

DjangoCore

The Album

DjangoCon 2008 39

DjangoCon 2008 40

Simon “Stinky” Willison

Also, a wizard

DjangoCon 2008 41

Python

DjangoCon 2008 42

Trendy

Google!

DjangoCon 2008 43

But not that trendy

DjangoCon 2008 44

But not that trendy

It’s no ruby

DjangoCon 2008 45

But not that trendy

It’s no ruby

Or Haskell

DjangoCon 2008 46

But not that trendy

It’s no ruby

Or Erlang

Or Haskell

DjangoCon 2008 47

But not that trendy

It’s no ruby

Or ErlangOr Scala

Or Haskell

DjangoCon 2008 48

Significant Whitespace

DjangoCon 2008 49

DjangoCon 2008 50

Salmon

DjangoCon 2008 51

Universe of marshy force. Field sense

shallows the hatchery saying Hello,. World!.

Hydro. Power spring sometimes; snowmelt

powers snowmelt always.

DjangoCon 2008 52

DjangoCon 2008 53

No quantum

superpositions

DjangoCon 2008 54

DjangoCon 2008 55

“-”.join(array)

DjangoCon 2008 56

Restarting the server?

WTF!?

DjangoCon 2008 57

WSGIReloadMechanism

DjangoCon 2008 58

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

DjangoCon 2008 59

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

[MOON L

ANGUAGE]

DjangoCon 2008 60

DjangoCon 2008 61

__import__()

from future import awesome

DjangoCon 2008 62

Basically, for hippies

OO languages

Scared of real

DjangoCon 2008 63

Frameworks

DjangoCon 2008 64

Flamework is a framework

But what does that mean?

DjangoCon 2008 65

Make common tasks:

faster

easier

error-free

DjangoCon 2008 66

Show a list of photos

Write an API method

Kill all humans

DjangoCon 2008 67

Front-tier frameworks

Act as glue

DjangoCon 2008 68

Data store

Business

Logic

Interaction

LogicTemplates

Request

Dispatcher

Users

Other

Services

Data Model

Framework

DjangoCon 2008 69

Great for getting started

Slows you down later?

What is it doing in there?

DjangoCon 2008 70

DjangoCon 2008 71

DjangoCon 2008 72

DjangoCon 2008 73

Fast

Flexible

Easy

Scalable

DjangoCon 2008 74

Large scale

is often not a good goal

DjangoCon 2008 75

Skyscrapers are special

DjangoCon 2008 76

Regular houses

Don’t need 10 story foundations

DjangoCon 2008 77

Just build!

DjangoCon 2008 78

DjangoCon 2008 79

DjangoCon 2008 80

DjangoCon 2008 81

Everything here is possible!

We care about easy

DjangoCon 2008 82

Large Scale

DjangoCon 2008 83

No multiple DB clusters

DjangoCon 2008 84

Manual partitioning

DjangoCon 2008 85

No multiple hosts per DB

DjangoCon 2008 86

Where do we read from?

DjangoCon 2008 87

How about now?

DjangoCon 2008 88

How about now ?

DjangoCon 2008 89

Read/write consistency

DjangoCon 2008 90

Read/write consistency

LAG!!1

DjangoCon 2008 91

Good for non-writing users

(logged out)

DjangoCon 2008 92

Non time-sensitive data

Feeds

Read-only APIs

DjangoCon 2008 93

DjangoCon 2008 94

Cool kids use

master/master pairs

DjangoCon 2008 95

Consistent read/write

1. Write to side A

2. Read from side B

3. Replication occurs

4. FAIL

DjangoCon 2008 96

Consistent read/write

1. Write to side A

2. Read from side A

3. ???

4. PROFIT!!

DjangoCon 2008 97

Then we can start to get fancy!