Monster Builds and How to Tame Them - Atlassian Summit 2010

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Monster Builds and How to Tame Them Chris Mountford, Atlassian

Technologie

Monster Builds
and How to Tame Them

Chris Mountford
chris@atlassian.com

1

Truck Build

Small

Monster
x
you
are
here
3

The Monster Build Threat
• Shipping
• Unit Testing
• Integration Testing
• Functional Testing
• Selenium Testing
• Synergy Harnessing

4

Poland
Hosted

Just JIRA Plugins

Multi

8

Poland
Hosted

Just JIRA Plugins

Multi

9

Build Duration
• release build took 30-60 CPU hours
• supported platform matrix combinations
• 3.5 hour functional test runs

JIRA
11

Long Builds Cause Low Velocity
• Context switching overhead
• Task entanglement
• Build breakage confusion
• Agile?

12

Taming Monster Build Times
•optimization
•matrix culling
•maximize test power
•minimize wait time
14

Optimization
• measure ﬁrst
• reduce network & disk
• RAM disks, proxies, colocation
• cut rework
• measure again

16

Example: JIRA Func Tests
•smarter admin navigation
•20% speedup

17

Matrix Culling
•browsers
•operating systems
•databases
•libraries
18

Example: JIRA Matrix Culling
• user based editions
• dropped ancient app servers
• dropped java 1.4
• release down to 18 hours

19

Power to Wait Ratio
functional tests

unit tests

20

Be Selectively Continuous
•common customer conﬁgurations
•branch vs trunk
•nightly builds
•sunday builds
21

tests
features
platforms
browsers
versions
ajax
22

Herb Sutter http://www.gotw.ca/publications/concurrency-ddj.htm

25

Parallelism
time

agent

Checkout,
Compile Testing

29

time

Parallelism
agent
agent
agent
agent
agent
agent
agent
Checkout, Testing
agent
Compileagent
agent
agent

30

The Embarrassingly
Parallel Problem
vs.
The Elastic Batches
of Bamboo!
31

Inelegant Yet Working
• parametrize your test suite:
• number of batches
• current batch number
• make the suite only run subset of tests in the
requested batch

33

svn
maven 2
nfs
repo

release
maven 1
build
proxy
agent

JIRA
license
internet
server

test db bamboo
java
blogs

40

My technology is
better

This ENDS NOW

49

Monster Counter-tactics
• measure, optimize, measure
• use power to wait ratio
• elastic parallelization
• canary builds measure reliability
• careful tool evaluation

50

Chris Mountford
JIRA Dude

chris@atlassian.com

52

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Monster Builds and How to Tame Them - Atlassian Summit 2010

1. Monster Builds and How to Tame Them Chris Mountford chris@atlassian.com 1

2. Source Code Build Working Software 2

3. Truck Build Small Monster x you are here 3

4. The Monster Build Threat • Shipping • Unit Testing • Integration Testing • Functional Testing • Selenium Testing • Synergy Harnessing 4

5. 5

6. Just JIRA 6

7. Just JIRA (not the biggest) 7

8. Poland Hosted Just JIRA Plugins Multi 8

9. Poland Hosted Just JIRA Plugins Multi 9

10. Wallboards 10

11. Build Duration • release build took 30-60 CPU hours • supported platform matrix combinations • 3.5 hour functional test runs JIRA 11

12. Long Builds Cause Low Velocity • Context switching overhead • Task entanglement • Build breakage confusion • Agile? 12

13. 13

14. Taming Monster Build Times •optimization •matrix culling •maximize test power •minimize wait time 14

15. 15

16. Optimization • measure ﬁrst • reduce network & disk • RAM disks, proxies, colocation • cut rework • measure again 16

17. Example: JIRA Func Tests •smarter admin navigation •20% speedup 17

18. Matrix Culling •browsers •operating systems •databases •libraries 18

19. Example: JIRA Matrix Culling • user based editions • dropped ancient app servers • dropped java 1.4 • release down to 18 hours 19

20. Power to Wait Ratio functional tests unit tests 20

21. Be Selectively Continuous •common customer conﬁgurations •branch vs trunk •nightly builds •sunday builds 21

22. tests features platforms browsers versions ajax 22

23. 23

24. 24

25. Herb Sutter http://www.gotw.ca/publications/concurrency-ddj.htm 25

26. 26

27. 27

28. Parallelism 28

29. Parallelism time agent Checkout, Compile Testing 29

30. time Parallelism agent agent agent agent agent agent agent Checkout, Testing agent Compileagent agent agent 30

31. The Embarrassingly Parallel Problem vs. The Elastic Batches of Bamboo! 31

32. 15 Inelegant Yet Working 32

33. Inelegant Yet Working • parametrize your test suite: • number of batches • current batch number • make the suite only run subset of tests in the requested batch 33

34. Inelegant Yet Working 34

35. Inelegant Yet Working 35

36. Need More Computers! 36

37. 37

38. 38

39. Reliability 39

40. svn maven 2 nfs repo release maven 1 build proxy agent JIRA license internet server test db bamboo java blogs 40

41. serve test db bamboo java blogs 41

42. $ False Negatives 42

43. 43

44. canary death 44

45. 45

46. 46

47. 47

48. Maven vs. Bash 48

49. My technology is better This ENDS NOW 49

50. Monster Counter-tactics • measure, optimize, measure • use power to wait ratio • elastic parallelization • canary builds measure reliability • careful tool evaluation 50

51. Eternal Vigilance 51

52. Chris Mountford JIRA Dude chris@atlassian.com 52

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