download to deployJohnnyT

@johnny_t

Who was just

Introduced to Smalltalk

for the first time?

My job is done

The good word

of Smalltalkhas been preached.

Thanks @norelap!

MagLev is an implementation of Ruby which runs on top of the GemStone/S

VM.

What is MagLev?

Before

Ruby

Year 0(1996)

After

Ruby

Year 0(1996)

Matz

Explored theworld of languages

Liked aspects of Perland had visited theIvory Tower of Smalltalk

~10BR(~1986)

Matz

Explored theworld of languages

Liked aspects of Perland had visited theIvory Tower of Smalltalk

18BR(1978)

15BR(1981)

Dan IngallsBYTE Magazine

(1981)

“To be truly object oriented

a system must provide

automatic storage management

(both data and code).”

RUBY_ENGINE“ruby”

rvm 1.9.3

‘puts RUBY_ENGINE’-eruby

“ruby”

MRI

and needs to be preached to the masses

Ruby is awesome!

7AR(2003)

9AR(2005)

DHH

and the land of Java needs some awesome

Ruby is awesome!

12AR(2008)

12AR(2008)

Charles Nutter

Year 0(1996)

JDK v1.0

Why Java?

Threading

RUBY_ENGINE“jruby”

“java”

java jruby-full.jar

‘puts RUBY_ENGINE’-erubyrvm jRuby

let’s go back to our rootsRuby is awesome!

12AR(2008)

12AR(2008)

10BR(1986)

Code

Data

GemStone/S v1.1

OOCL 1.5 billion data objects> 5,800 people in 150 offices globallyFinancial, CS, vendor mgmt, legal, sales

GemStone/S v1.xImprovements from working with OOCL

New classes

Automated trading

GemStone/S v1.y Improvements from working with JP Morgan

New ReducedConflict classes

Install MagLev

Download stone

File in RubyRuby core in the stone

Ruby Core

Data Stores

PostgreSQL

✓ Install✓ Setup

credentials✓ Start daemon

Server Client

login

connection

PostgreSQL

Clientlogin

connection

Execute PL/pgSQL, PL/Perl, PL/Python ...

MagLevClient

login

Shared Page Cache

ClientAttaches to SPCCan execute Ruby as the ‘data manipulation language’

RUBY_ENGINE“maglev”

“maglev”

login

topaz

‘puts RUBY_ENGINE’-erubyrvm jRuby

Object-Relational Impedance Mismatch

Magic, Jobs and Geohashes

Examples

The Hat Trick

hat.rb

rabbit.rb

Abort is not a bad guy

create_hat.rb

Hat Trick

JobQueueLet’s persist some blocks

worker.rb

job.rb

Jobs example

Geohashlatitude, longitude => indexable string

Looking at kids of:root cell.

Precision of 1:

Grid size: 8 x 4Cell count: 32

A cell’s approx size:2.5 million km2

~ size of Australia

MWRC is in themiddle left of the root.

GOTO: 9

Looking at kids of:‘9’.

Precision of 2:

Grid size: 32 x 32Cell count: 1024

A cell’s approx size:781k km2

~ size of UK, Spain or Texas

MWRC is in thetop right of 9

GOTO: 9x

Looking at kids of:‘9x’.

Precision of 3:

Grid size: 256 x 128Cell count: 32k

A cell’s approx size:24k km2

~ size of US County

MWRC is in thebottom left of 9x

GOTO: 9x0

Looking at kids of:‘9x0’.

Precision of 4:

Grid size: 1024 x 1024Cell count: 1.04M

A cell’s approx size:760 km2

~ size of large city

MWRC is in thetop center of 9x0

GOTO: 9x0r

Looking at kids of:‘9x0r’.

Precision of 5:

Grid size: 8192 x 4096Cell count: ~33.5M

A cell’s approx size:24 km2

~ US Postal Code

MWRC is in thetop right of 9x0r

GOTO: 9x0ry

Looking at kids of:‘9x0ry’.

Precision of 6:

Grid size: 32768 x 32768Cell count: ~1.07B

A cell’s approx size:0.73 km2

~ Neighborhood

MWRC is in themiddle left of 9x0ry

GOTO: 9x0ryh

Looking at kids of:‘9x0ryh’.

Precision of 7:

Grid size: 262144 x 1310762Cell count: ~34.36B

A cell’s approx size:23k m2

~ Street

MWRC is in thebottom left of 9x0ryh

GOTO: 9x0ryh0

Looking at kids of:‘9x0ryh0’.

Precision of 8:

Grid size: 1048576 x 1048576Cell count: ~1.09T

A cell’s approx size:726 m2

~ House / Office

MWRC is in themiddle of 9x0ryh0

GOTO: 9x0ryh0k

Looking at kids of:‘9x0ryh0k’.

Precision of 9:

Grid size: 8388608 x 4194304Cell count: ~35T

A cell’s approx size:23 m2

~ Room

MWRC is in themiddle of 9x0ryh0k

GOTO: 9x0ryh0kt

Looking at kids of:‘9x0ryh0kt’.

Precision of 10:

Grid size: 33554432 x 33554432Cell count: ~1Q( 1 e+15 )

A cell’s approx size:0.7 m2

~ Room

JohnnyT is speaking on stage at MWRC in the middle right of 9x0ryh0kt

GOTO: 9x0ryh0ktu

Looking at kids of:‘9x0ryh0ktu’.

Precision of 11:

Grid size: 268435456 x 134217728Cell count: ~36Q( 3.6 e+16 )

A cell’s approx size:222 cm2

~ Room

We made it.Just FYI - my children:

Precision of 12:

Grid size: 1073741824 x 1073741824Cell count: ~36Q( 3.6 e+16 )

A cell’s approx size:7 cm2

~ Deck of cards

1073741824

@char

@parent

@kids0

..

.z

Root Cell

‘’

nil

@char

@parent

@kids0

..

.

0

‘0’

..

.9

@char

@parent

@kidsx

..

.

9

‘9’

@char

@parent

@kids0

..

.

9x

‘x’

@char

@parent

@kidsr

..

.

9x0

‘0’

@char

@parent

@kids...

9x0r

‘r’

Geocell Data Structure

geocell.rb

generator.rb

Thanks!