My mom told me that Git doesn’t scale by Vicent Martí

Saturday, May 11, 13

These are the things you don’t

care about

github

Git hosting:No longer a pain in the ass

github

Git hosting:No longer a pain in the ass

for you.Not for us.

Because, goddamnit,if I ever find the guy who invented

this thing I’m going to hang him froma fence by his underwear and.Saturday, May 11, 13

Let’s host some Git repos!

file.c src

file.h README.md COPYING.md

Bare Repository

HEAD index objects refs

git-daemon

OK, now about the web...

Ruby - Gitinterface

OK, now about the web...

Bare Repository

Ruby - Gitinterface

1VMgrit

📽storage

rails app

nVM 📽storage

nVM 📽storage(GFS)

Rails was making us slow.

Literally.Saturday, May 11, 13

Time to move to

Real Hardware

fileservers

frontends

📸db

fileservers

frontends

📸db

?????????

bert(binary Erlang term)

bert(binary Erlang term)ernie

(not an acronym)

📸chimney(Redis)

frontend

fileserver

erniegrit

Vertical Scaling#realtalk

bottleneck:

solution:

shell out to

bottleneck:

shell out to

bottleneck:

solution:

shell out to

bottleneck:

solution:

shell out to

properly

GUISEGUISE

GUISEGUISEGUISE

...what?

Why don’t we take

the Git binary...

Why don’t we take

the Git binary...yeah?

Why don’t we take

the Git binary...yeah? and compile it as

Why don’t we take

a library

Why don’t we take

a libraryoh... go on...

Why don’t we take

and link that into

Why don’t we take

and link that intoour server

ScientificGraph™

Well, we didn’t think about

freeing memory, but...

freeing memory, but...THIS IS THE KIND

OF PROBLEMWE COULD SOLVE

WITH CGISaturday, May 11, 13

freeing memory, but...THIS IS THE KIND

OF PROBLEMWE COULD SOLVE

WITH CGIIN 1995

ScientificGraph™

What do you mean

the server died?

die("BUG: non-INDEX attr direction

in a bare repo");

die("a bad revision is needed");

die("'%s' is not a valid branch name.", name); die("Empty patc

Aborted.");

die("unable to read index file");

What do you mean

the server died?

libgit

libgit2the “2” means this

frees memory

libgit2the “2” means this

frees memory

NOT ENOUGH

ABSTRACT

FACTORIES

JGitthe “J” means this oneis in Java

...not our thing.Saturday, May 11, 13

Javaa brief timeline

New companies don’t use Java

because it’snot like Unix

New companies use Java

because it’snew and shiny

because it’sooooooold

New companies use the JVM

because WEBSCALE

Javaa brief timeline

because it’snot like Unix

New companies use Java

because it’snew and shiny

because it’sooooooold

New companies use the JVM

because WEBSCALE

github

If you think you understandthe JVM, you are either:

a) Very smart

a) Very smartb) Very wrong

Some people think that github is a

Rails shopRuby shop.or even a

Some people think that github is a

Rails shopRuby shop.or even a

github is a

Unix shopand everything else is

just a detail.

libgit2So,

Good Heavens,just look at the time.

It’s NoSQL o’clock

NoSQL NoSQL

NoSQLNoSQL

...do you even

...do you even mongo?

a b r i e f i n t r o d u c t i o nt o t h e G i t d a t a m o d e l

file.c src

treesrc/

README.md

COPYING.md

treefile.c

file.h

commit

parent

tree Tmetadata

commitT

Behold,a graph.

Well that was easy.

master

killme

Li!le knowntorture methods:

warning:the rabbithole ispretty deep

Git doesn’t give a #!%$ about CAP

Number of hops on a complex query 1,000,000

Required hops for a successful query 1,000,000

Replica count to ensure 100% availability

a metric shittonSaturday, May 11, 13

We could fix it.

We could fix it.But we won’t.

libgit2

GitRPCSaturday, May 11, 13

GitRPCLess.

GitRPC

Rugged

libgit2

server

📸chimney(Redis)

frontend

fileserver

ernie-corn

GitRPC GitRPC

📸chimney(Redis)

frontend fileserver

GitRPC GitRPCserverclient

evolutionary(disappointing?)

We’ve had a lot of

We’ve had a lot of hard

engineering challenges

We tackled them by:

Using themost reliable

tools we know.

Challenging ourselves to build

the simplest thing.Not because it’s easy,but because it works.

Innovatingwhere it really ma!ers.

revolutionaryproduct

building a

revolutionarybackend.

Having fun

My mom told me that Git doesn’t scale by Vicent Martí

Technology

PowerPoint Presentation€¦ · $ git init $ git add $ git status $ git commit $ git push $ git pull $ git clone • • • • • • • • $ sudo apt-get install

2013 GIT Sinhala @ apepanthiya GIT Sinhala... · 2013 GIT Sinhala @ apepanthiya.lk Subject: G.C.E A/L GIT Past Papers Keywords: git, al git, git papers, git past papers, git exam,

2012 GIT Sinhala @ apepanthiya GIT Sinhala @ apepanthiya.lk.pdf2012 GIT Sinhala @ apepanthiya.lk Subject: G.C.E A/L GIT Past Papers Keywords: git, al git, git papers, git past papers,

JAPAN. Martí, Genís i Fran

Treball vicent ferrer 4t b

Vicent Van Gogh 2

Sermons de Vicent Ferrer-TEIDE

Vicent andres estellés

Marques Josep Vicent - No Es Natural

Vicent I Hector Wi Fi

CS140 Project 1: Threads - Stanford University · git basics git add git commit git pull git push git merge git branch * Lots of git tutorials and help available online

Vicent Van Gogh. Cartas Desde Provenza

Johan Herland €¦ · The Git Parable Git - simple & powerful git init git add … git commit … git branch … git checkout … git tag … git diff …

Enric Valor - per Vicent Brotons

Boletin INGRESO 2012 | Martí | MILES

José martí web quest

Sánchez Juny, Martí Enginyeria Civil

Vicent Andrés Estellés

Vicent Price

El cant de vicent