Vaadin scalability-slides

Server-side RIA Scalability Joonas Lehtinen, PhD Vaadin Ltd, CEO

healthcare portal, 100 kloc of perl, .. 89 19

web 1.0, netscape, ie5, ie6, ...

thinking of object oriented design, desktop, Java, U and I ...

desktop programming paradigm for web!

founded millstone ajax google web toolkit 00 08 02 05 20 20 20 20

re-named to 09 20

Vaadin is a UI framework for desktop-like web apps

java html

more secure code stays in server powerful open source all Java tools free Apache & libraries license Vaadin value proposition simpler forget the web cost-effective no JavaScript modular debugging extensible ♲

Does Server- side RIA Scale?

Server-side RIA?

“Web 1.0” Client 5 Server HTML Page DOM over HttpResponse View 4 3 Model Parameters over HttpRequest Controller 2 DB 1

Client-side RIA Client 4 Server Requested data View to view as XML / JSON 5 DOM Model 3 1 Changes to model Controller encoded as parameters DB 2

Server-side RIA Client 8 Server 9 7 TerminalAdapter TerminalAdapter HTML Page over HttpResponse View 6 Automated by 5 DOM the RIA framework Model Handled by the framework Parameters over HttpRequest Controller 1 4 3 DB 2

Scale?

Top 3 Questions Server-side memory consumption per session Server-side RIA Scalability Server-side CPU usage by the user questions interface logic Initial application download and Ajax trafﬁc

Answer Depends on your application

Big enough application to prove the point?

Movie ticket reservation system

Think BIG

238 countries

6 671 theaters

70 578 rooms

21 141 641 seats

3 movies per night

up to 320 million tickets per month

up to 35 billion € per year

which exceeds total global box office sales of 30 billion USD in 2009 estimated by MPAA

assume • 70% fill rate • 2 tickets per sales transaction we should be able to handle 2 593 transactions per minute on average - 24/7

unﬁ nis pro hed jec t

How it’s made?

Vaadin Framework User Interface Logic Business Logic MySQL DB

Business Logic paid tickets reservations countries cities theaters shows ... MySQL DB

Business Logic reservations cities, ... paid Ehcache tickets cities, ... MySQL DB

Vaadin Framework User Interface Logic Business Logic Ehcache MySQL DB

Apache Tomcat Vaadin Framework User Interface Logic Business Logic Ehcache MySQL DB

Tomcat Tomcat Tomcat Vaadin Vaadin Vaadin UI UI UI Logic Logic Logic Ehcache Ehcache Ehcache MySQL DB

ELB Tomcat Tomcat Tomcat EC2-Large EC2-Large EC2-Large • 7.5GB mem • 7.5GB mem • 7.5GB mem • 2 CPU cores • 2 CPU cores • 2 CPU cores • $0.34 / hour • $0.34 / hour • $0.34 / hour MySQL EC2-Large • $0.34 / hour EBS EBS

Benchmarking

ELB Test Tomcat Tomcat EC2-Large EC2-Large EC2-Large • 7.5GB mem • 7.5GB mem • 7.5GB mem • 2 CPU cores • 2 CPU cores • 2 CPU cores • $0.34 / hour • $0.34 / hour • $0.34 / hour MySQL EC2-Large • $0.34 / hour EBS EBS

JVM Custom Test App HTMLUnit Rhino DOM ELB

Custom Test App #100 ELB

EC2-XL (7GB, 8 cores) Custom Test App #100 Custom Test App #100 ELB

EC2-XL (7GB, 8 cores) EC2-XL Custom Test App #100 Custom Test App #100 ELB

Results in o rk s w res ro g p

10 XL Test Servers 1 Large Tomcat 1 MySQL (UI Only Test)

1 XL Test Servers 2 JVMs (200 threads) 1 Large Tomcat 1 MySQL (UI Only Test)

start setup ajax ﬁnished

10 XL Test Servers (2000 clients) 1 Large Tomcat 1 MySQL (UI Only Test) JVM GC Pause

HTTP-level Benchmark in o rk s w res ro g p

ELB Test Tomcat Tomcat EC2-Large EC2-Large EC2-Large • 7.5GB mem • 7.5GB mem • 7.5GB mem • 2 CPU cores • 2 CPU cores • 2 CPU cores • $0.34 / hour • $0.34 / hour • $0.34 / hour MySQL EC2-Large • $0.34 / hour EBS EBS

test Apache JMeter recording ELB

One Tomcat Scenarios per minute Average ajax response (ms) 2000 150 1600 120 1200 90 800 60 400 30 0 0 Sales / Minute Avg response (ms) 100 500 1500 2000 3000 Concurrent simulated users users

Server load Tomcat JMeter

Server load 3000 simulated concurrent users Tomcat

Guesstimates

assume • 2 593 sales transactions per minute • 50% of the visitors buy tickets • session takes 5 minutes in average we should be able to handle 25 930 concurrent users on average - 24/7

Resource requirements?

measured session size 188kb tomcat memory req. ~6-8GB

network traffic / session ~200kb 1GB / minute 500 TB / year

Expected hosting costs?

Servers 2 x MySQL Server (EC2-Large) $2984 / year (reserved instance) 10 x Tomcat Server (EC2-Large) $14920 / year (reserved instance) Elastic Block Store (4 x 50GB) $240 / year Total $18144 / year

Network 500TB trafﬁc $55000 / year Elastic Load Balancing $4216 / year Total $59216 / year

Total hosting costs Total hosting costs: $77360 / year $20 per million tickets sold Hosting costs are 0.00016% of the QuickTickets sales

Questions Comments joon as@vaadin.com +358-40-5035001 sky pe://joonaslehtinen

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