The power of Gatling is the DSL it provides to allow writing meaningful and expressive tests. We provide an overview of the framework, a description of their development environment and goals, and present their test results. Source code available https://github.com/lawlessc/random-response-time

1. GATLING

2. GATLING
DSLing your System For Scalability Testing Using Gatling
Sept 23 2014, Dublin Scala User Group

3. Speaking for ourselves and not our
employer

4. Thanks!
• The Team
• Gatling Walkthrough
• Example Results
• Our App - and what we need
• and a lab!

5. The Team

6. CHRIS
LAWLESS
Code Wrangler
Polygon creator
KEVIN
YU WEI XIA
Code Wrangler
CIARAN
Ó HUALLACHÁIN
Code Wrangler
FERGAL
CARROLL
Code Wrangler
@phergalkarl
AMAN KOHLI
Architect
@akohli
BILL MONKS
Leader in Chief
@billmonks
The Team

7. HACKENBUSH
We’re Not Experts

8. Enterprise Mobile
Many Users, Many Systems
• > 20k users
• ~ 20k systems (joke!)
Lots of different security access
and systems
Device plurality
Many Locations, Many
Networks

9. Gatling
• http://gatling.io | https://
github.com/gatling/
• Built on Netty + Akka + Scala
• add to sbt -
libraryDependencies +=
"io.gatling.highcharts" % "gatling-charts-
highcharts" % "2.0.0-RC5"
• Good start http://
www.thoughtworks.com/
insights/blog/gatling-take-your-
performance-tests-next-level

10. Why Gatling
• Powerful, simple DSL
scn.users(10).ramp(30).protocolConfig(
httpConf)!
• Easy to add security and
other elements
• Varying transport support
• HTTP
• Websockets
• JMS
• We found Jmeter fiddly.

11. Why Gatling (2)
• Great Reporting and Charting
• Active Users, Requests
• Over time
• See Example 1
• walk through Details and
Global views

12. Anatomy of a Gatling Script

13. Example
Transport, and host
header cfg

14. Example
Transport, and host
header cfg
endpoint
scenario
name Req Name Method

15. Example
Transport, and host
header cfg

16. Making it a bit like flod

17. GITHUB.COM/SPUMKO/FLOD
$ flod -n 2000 -t 1500 -c 100..1000 -v http://target-place
!
!

18. GITHUB.COM/SPUMKO/FLOD
num req per
batch
range of concurrent request per batch -
$ flod -n 2000 -t 1500 -c 100..1000 -v http://target-place
!
!
timeout
“rate”

19. FLOD OUTPUT
## 6k page results
ec2-user@ip-10-199-51-233 node-hapi]$ flod -n 2000 -t 1500 -c 100..1000 -v http://localhost/loremipsum-6k-ish.html
This is Flod, version 0.2.2
Copyright 2013 Walmart, http://github.com/spumko/flod
!
Benchmarking (hold on)...
!
Server Requests/sec Latency (ms)
--------------------------------------- ------------ ---------------
http://localhost/loremipsum-6k-ish.html 100 96.48 ± 18.54
http://localhost/loremipsum-6k-ish.html 200 164.24 ± 17.03
http://localhost/loremipsum-6k-ish.html 300 263.80 ± 62.44
http://localhost/loremipsum-6k-ish.html 400 359.61 ± 49.20
http://localhost/loremipsum-6k-ish.html 500 437.66 ± 58.69
http://localhost/loremipsum-6k-ish.html 600 481.29 ± 120.04
http://localhost/loremipsum-6k-ish.html 700 606.74 ± 114.45
http://localhost/loremipsum-6k-ish.html 800 555.08 ± 133.74
http://localhost/loremipsum-6k-ish.html 900 674.08 ± 190.91
http://localhost/loremipsum-6k-ish.html 1000 763.27 ± 69.25
## running with high timeout - doubling responses times vs nginx direct
[ec2-user@ip-10-199-51-233 node-hapi]$ ../node_modules/flod/bin/flod -n 2000 -t 4500 -c 100..1000 -v http://localhost:8000
This is Flod, version 0.2.2
Copyright 2013 Walmart, http://github.com/spumko/flod
!
Benchmarking (hold on)...
!
Server Requests/sec Latency (ms)
--------------------- ------------ ----------------
http://localhost:8000 100 200.55 ± 39.40
http://localhost:8000 200 389.54 ± 67.39
http://localhost:8000 300 558.14 ± 112.57
http://localhost:8000 400 777.09 ± 160.01
http://localhost:8000 500 970.61 ± 305.76
http://localhost:8000 600 1032.37 ± 274.44
http://localhost:8000 700 1216.49 ± 249.94
http://localhost:8000 800 1483.31 ± 690.64
http://localhost:8000 900 1559.54 ± 805.31
http://localhost:8000 1000 1909.23 ± 845.81

20. NQF (not quite Flod)

21. Results

22. Random Wait Test
• 100 users, 100 invocations each
• ramp to 100 users over 20 seconds
• Tests took 1
minute to run
• 10k requests

23. Users over Execution

24. Response Time

25. Requests and Responses per Second

26. Our Application
And what we need

27. Security Pass
Sensors Employee Devices
The Physical World
THE REFLEKTOR
Security Services
AuthZ
AuthN
…
Eventing
Engine
Bridge
Payment
Services
Access
Services
Printing
Services
the Reflektor
Bridge and New Services
App Services and
Resources

28. thePROXY First Release

29. THE FLOW
• The Protocol
• Security - Gateway Access
• Federated Identity - kinda

30. PROTOCOL
Request
json body
target
headers
body/post-data
loginfo
request = {
URL = "http://www.citigroup.net/",
method = "GET",
timeout = 19500,
clientInfo = {
identifier = “…E”,
model = "iPad Simulator",
systemName = "iPhone OS",
systemVersion = "7.1",
},
headers = {
Accept = "text/html,application/xhtml
+xml,application/xml;q=0.9,*/*;q=0.8",
Cookie = "CGPLNG=ENG; JSESSIONID_CGNR3=..”,
"User-Agent" = "Mozilla/5.0 (iPad; CPU OS 7_1 like
Mac OS X) AppleWebKit/537.51.2 (KHTML, like Gecko) Mobile/
11D167"
},
logEntries = [
{
URL = “https://cinternal.site/target/fooa”,
downstreamDuration = 656,
httpMethod = "GET",
roundtripDuration = 3461,
statusCode = 200
} ]
}

31. RESPONSE
body = “<base64>",
code = 200,
duration = 31,
headers = {
"Accept-Ranges" = [
"bytes"
],
"Content-Length" = [
225
],
"Content-Type" = [
"text/html"
],
Date = [
"Thu, 29 May 2014 15:28:29 GMT"
],
Etag = [
""e1-4e50c74f""
],
"Last-Modified" = [
"Sun, 21 Aug 2011 08:52:31 GMT"
]
},
message = "OK"
}

32. Any Questions?
– Anon.

33. Lab

34. Invocation
• Fixed Endpoint
• http://cakohli.local:9001/waitfor/500
• Random Endpoint
• http://cakohli.local:9001/wait
• Interleave

35. Thank you Scala Dublin
and @gilttech and @greheine and Joe McCarthy (@jmcarthy99) and
@nounproject

36. NOUN PROJECTS THANKS
Smartphone designed by James Fenton from the Noun Project
!
Creative Commons – Attribution (CC BY 3.0)
Identification designed by Mark Shorter from the Noun Project
Ibeacon designed by Stéphanie Rusch from the
Nount Project
!
Creative Commons – Attribution (CC BY 3.0)
Arduino designed by uizin from the Noun Project
!