Kundenname, Präsentationstitel

BUILDING SCALABLE WEB APPS

ABOUT ME

Matías E. Fernández @matiasfrndz

Head of Systems and Development

WHAT DOES “SCALABLE” MEAN?

≠ efficient usage of CPU

≠ efficient usage of bandwidth

≠ efficient usage of storage

≠ fast page loads in browser

SCALABILITY ≠ PERFORMANCE

WTF?

SCALABILITY

In electronics (including hardware, communication and software), scalability is the ability of a system, network, or process to handle a growing amount of work in a capable manner or its ability to be enlarged to accommodate that growth.

en.wikipedia.org/wiki/Scalability

VERTICAL VS. HORIZONTAL SCALABILITY

VERTICAL SCALING

Bigger, faster, stronger!

HORIZONTAL SCALING

Start small …

HORIZONTAL SCALING

HORIZONTAL SCALING

Think BIG!

WHY BOTHER?

Because web startups tend to die

or grow … really big!

EXAMPLES

YOUTUBE• Founded in 2005 in a garage

• Officially launched in December 2005 with 8 million videos watched per day

• 100 million views a day in July 2006

• Over 4 Billion videos viewed per day in January 2012

• 72 hours of video uploaded every minute in May 2012

x 12 in7 month!

YOUTUBE

1 mio

10 mio

100 mio

1'000 mio

10'000 mio

2005

2006

2012

YouTube videos watched per day

Notice the logarithmic scale, bro?

TWITTER

• Founded in March 2006

• Officially launched in July 2006

• 400’000 tweets per quarter in 2007

• 100 million tweets per quarter in 2008

• 65 million tweets per day in June 2010

• 140 million tweets per day in March 2011, 1’600 tweets per second

x 230 in12 month!

TWITTER

1'000

10'000

100'000

1'000'000

10'000'000

100'000'000

2007

2008

2010

Tweets per day

Recognise the scale?

BETTER BE PREPARED

Rewriting your web app to be scalable

and

at the same time scale it to accommodatea 10 to 100 fold of customers

in 12 month?

Sounds like a challenge!

PLAYING FOR TIMEStrategies to Scaling out a Non-Scalable Web App

Semi

KEEP THINGS SIMPLE

Add caching reverse proxy to reduce theload on your web app and server

HTTP Accelerator

WE ALL START SMALL

Separate database and app server to gainCPU and I/O-performance

App Server

Database Server

LET’S START THE PARTY

App Servers

Redundant Load Balancerw. HTTP Acc.

We still needour database

SCALE OUT

vertically

verticallyhorizontally

SINGLE POINT OF FAILURE

They call me single pointof failure

REDUCE SPOF

2-Node FailoverCluster highly availability

✔

Kundenname, Präsentationstitel

Nine Internet Solutions AG

Albisriederstr. 243a

CH-8047 Zürich

Tel +41 44 637 40 00

Fax +41 44 637 40 01

info@nine.ch

QUESTIONS?