Building Scalable Web Apps

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Matías E. Fernández

Strategies to Scaling out a Non-Scalable Web App

Tecnologia

ABOUT ME
Matías E. Fernández @matiasfrndz
Head of Systems and Development

≠ efficient usage of CPU
≠ efficient usage of bandwidth
≠ efficient usage of storage
≠ fast page loads in browser
SCALABILITY ≠ PERFORMANCE

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 SCALING
Bigger, faster, stronger!

WHY BOTHER?
Because web startups tend to die
or grow … really big!

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 in 
7 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 in 
12 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 accommodate 
a 10 to 100 fold of customers 
in 12 month?
Sounds like a challenge!

PLAYING FOR TIME
Strategies to Scaling out a Non-Scalable Web App
Semi

KEEP THINGS SIMPLE
Add caching reverse proxy to reduce the
load on your web app and server
HTTP Accelerator

WE ALL START SMALL
Separate database and app server to gain
CPU and I/O-performance
App Server
Database Server

LET’S START THE PARTY
App Servers
Redundant Load Balancer
w. HTTP Acc.
We still need
our database

SCALE OUT
vertically
vertically
horizontally

SINGLE POINT OF FAILURE
They call me single point 
of failure

REDUCE SPOF
2-Node Failover 
Cluster 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?

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Building Scalable Web Apps

1. BUILDING SCALABLE WEB APPS

2. ABOUT ME Matías E. Fernández @matiasfrndz Head of Systems and Development

3. WHAT DOES “SCALABLE” MEAN?

4. ≠ efficient usage of CPU ≠ efficient usage of bandwidth ≠ efficient usage of storage ≠ fast page loads in browser SCALABILITY ≠ PERFORMANCE

5. WTF?

6. 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

7. VERTICAL VS. HORIZONTAL SCALABILITY

8. VERTICAL SCALING Bigger, faster, stronger!

9. HORIZONTAL SCALING Start small …

10. HORIZONTAL SCALING

11. HORIZONTAL SCALING Think BIG!

12. WHY BOTHER? Because web startups tend to die or grow … really big!

13. EXAMPLES

14. 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 in  7 month!

15. 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?

16. 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 in  12 month!

17. 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?

18. BETTER BE PREPARED Rewriting your web app to be scalable and at the same time scale it to accommodate  a 10 to 100 fold of customers  in 12 month? Sounds like a challenge!

19. PLAYING FOR TIME Strategies to Scaling out a Non-Scalable Web App Semi

20. KEEP THINGS SIMPLE Add caching reverse proxy to reduce the load on your web app and server HTTP Accelerator

21. WE ALL START SMALL Separate database and app server to gain CPU and I/O-performance App Server Database Server

22. LET’S START THE PARTY App Servers Redundant Load Balancer w. HTTP Acc. We still need our database

23. SCALE OUT vertically vertically horizontally

24. SINGLE POINT OF FAILURE They call me single point  of failure

25. REDUCE SPOF 2-Node Failover  Cluster highly availability ✔

26. 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?

27. Kundenname, Präsentationstitel

Building Scalable Web Apps

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Building Scalable Web Apps