1. DESIGNING FOR RAPID RELEASE
Sam Newman
ThoughtWorks

2. We’re hiring...
GOTO: Aarhus 2012
@samnewman

3. Not Him
We’re hiring...
GOTO: Aarhus 2012
@samnewman

4. GOTO: Aarhus 2012
@samnewman

9. We’re hiring...
GOTO: Aarhus 2012
@samnewman

10. Why is rapid release
important?
GOTO: Aarhus 2012
@samnewman

11. What criteria influence
design?
GOTO: Aarhus 2012
@samnewman

12. Scaling
What criteria influence
design?
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@samnewman

13. Scaling
Durability
What criteria influence
design?
GOTO: Aarhus 2012
@samnewman

14. Scaling
Durability
What criteria influence
design?
Geographical
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@samnewman

15. Scaling
Compliance
Durability
What criteria influence
design?
Geographical
GOTO: Aarhus 2012
@samnewman

16. Scaling
Compliance
Durability
What criteria influence
design?
Geographical
GOTO: Aarhus 2012
Technology
@samnewman

17. Performance
Scaling
Compliance
Durability
What criteria influence
design?
Geographical
GOTO: Aarhus 2012
Technology
@samnewman

18. What about making it
easy to release?
GOTO: Aarhus 2012
@samnewman

19. GOTO: Aarhus 2012
@samnewman

20. Make it quick to make a change
GOTO: Aarhus 2012
@samnewman

21. Make it quick to make a change
Make it quick to deploy the
change
GOTO: Aarhus 2012
@samnewman

22. Make it quick to make a change
Make it quick to deploy the
change
Reduce the risk of releasing
GOTO: Aarhus 2012
@samnewman

23. MusikShop
v1
GOTO: Aarhus 2012
@samnewman

24. MusikShop
v1
GOTO: Aarhus 2012
@samnewman

25. MusikShop
v2
GOTO: Aarhus 2012
@samnewman

26. v23
v1
v9
v14
MusikShop
GOTO: Aarhus 2012
@samnewman

27. v23
v1
v9
v14
MusikShop
GOTO: Aarhus 2012
@samnewman

28. v23
v2
v9
v14
MusikShop
GOTO: Aarhus 2012
@samnewman

29. GOTO: Aarhus 2012
@samnewman

30. The Same Change...
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@samnewman

31. The Same Change...
...resulting in very different
deployments
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@samnewman

32. GOTO: Aarhus 2012
@samnewman

33. GOTO: Aarhus 2012
@samnewman

34. GOTO: Aarhus 2012
@samnewman

35. GOTO: Aarhus 2012
@samnewman

36. GOTO: Aarhus 2012
@samnewman

37. GOTO: Aarhus 2012
@samnewman

38. GOTO: Aarhus 2012
@samnewman

39. ...
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@samnewman

40. Each release is a rollback point
...
GOTO: Aarhus 2012
@samnewman

41. Each release is a rollback point
and a data gathering point
...
GOTO: Aarhus 2012
@samnewman

42. Each release is a rollback point
and a data gathering point
...
GOTO: Aarhus 2012
and a release process
practiced often is more likely
to work and to be efficient
@samnewman

43. Small, Incremental
Releases FTW!
GOTO: Aarhus 2012
@samnewman

44. So how do we design
our systems to allow
for small changes?
GOTO: Aarhus 2012
@samnewman

45. GOTO: Aarhus 2012
@samnewman

46. MusikShop
GOTO: Aarhus 2012
@samnewman

47. MusikShop
Rekomend
Lib
GOTO: Aarhus 2012
@samnewman

48. MusikShop
Rekomend
Lib
Invoice
Creation
GOTO: Aarhus 2012
@samnewman

49. MusikShop
Rekomend
Lib
Invoice
Creation
...
GOTO: Aarhus 2012
@samnewman

50. MusikShop
Rekomend
Lib
Invoice
Creation
...
String Utils
GOTO: Aarhus 2012
@samnewman

51. MusikShop
Rekomend
Lib
Small units - easier to
reason about
Invoice
Creation
...
String Utils
GOTO: Aarhus 2012
@samnewman

52. MusikShop
Rekomend
Lib
Invoice
Creation
Small units - easier to
reason about
Fast CI turnaround
cycles
...
String Utils
GOTO: Aarhus 2012
@samnewman

53. GOTO: Aarhus 2012
@samnewman

54. MusikShop v1
GOTO: Aarhus 2012
@samnewman

55. MusikShop v1
Rekomend
Lib v134
GOTO: Aarhus 2012
@samnewman

56. MusikShop v1
Rekomend
Lib v134
GOTO: Aarhus 2012
Rekomend
Lib v200
@samnewman

57. MusikShop v1
MusikShop v2
Rekomend
Lib v134
Rekomend
Lib v200
GOTO: Aarhus 2012
@samnewman

58. MusikShop v1
MusikShop v2
Rekomend
Lib v134
Rekomend
Lib v200
Change to a statically linked library =
new deployment of the application
GOTO: Aarhus 2012
@samnewman

59. MusikShop v1
GOTO: Aarhus 2012
@samnewman

60. MusikShop v1
Rekomender
v124
GOTO: Aarhus 2012
@samnewman

61. MusikShop v1
Rekomender
v124
GOTO: Aarhus 2012
@samnewman

62. MusikShop v1
Rekomender
v124
GOTO: Aarhus 2012
Rekomender
v200
@samnewman

63. MusikShop v1
Rekomender
v124
GOTO: Aarhus 2012
Rekomender
v200
@samnewman

64. MusikShop v1
Rekomender
v124
GOTO: Aarhus 2012
@samnewman

65. MusikShop v1
Rekomender
v124
GOTO: Aarhus 2012
Rekomender
v200
@samnewman

66. MusikShop v1
Smoke Test
Rekomender
v124
GOTO: Aarhus 2012
Rekomender
v200
@samnewman

67. MusikShop v1
Showcase
Smoke Test
Rekomender
v124
GOTO: Aarhus 2012
Rekomender
v200
@samnewman

68. MusikShop v1
Showcase
Smoke Test
Rekomender
v124
GOTO: Aarhus 2012
Rekomender
v200
@samnewman

69. MusikShop v1
Showcase
Smoke Test
Rekomender
v124
Rekomender
v200
Blue/Green Deployments
GOTO: Aarhus 2012
@samnewman

70. GOTO: Aarhus 2012
@samnewman

71. GOTO: Aarhus 2012
@samnewman

72. What can stop blue/
green deployments?
GOTO: Aarhus 2012
@samnewman

73. User
GOTO: Aarhus 2012
@samnewman

74. User
MusikShop v1
GOTO: Aarhus 2012
@samnewman

75. User
MusikShop v1
State
GOTO: Aarhus 2012
@samnewman

76. User
MusikShop v1
MusikShop v2
State
GOTO: Aarhus 2012
@samnewman

77. User
MusikShop v1
MusikShop v2
State
GOTO: Aarhus 2012
@samnewman

78. User
MusikShop v1
MusikShop v2
State
GOTO: Aarhus 2012
@samnewman

79. User
MusikShop v1
MusikShop v2
State
Avoid stateful services
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@samnewman

80. Expensive Hardware!
GOTO: Aarhus 2012
@samnewman

81. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
Brakes’!
Rekomender
v124
Manual Circuit Breaker
GOTO: Aarhus 2012
@samnewman

82. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
Brakes’!
Rekomender
v124
Manual Circuit Breaker
GOTO: Aarhus 2012
@samnewman

83. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
We Can’t Rekomend
Brakes’!
Right Now!
Rekomender
v124
Manual Circuit Breaker
GOTO: Aarhus 2012
@samnewman

84. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
We Can’t Rekomend
Brakes’!
Right Now!
Rekomender
Rekomender
v124
v200
Manual Circuit Breaker
GOTO: Aarhus 2012
@samnewman

85. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
We Can’t Rekomend
Brakes’!
Right Now!
Rekomender
Rekomender
v124
v200
Smoke Test
Manual Circuit Breaker
GOTO: Aarhus 2012
@samnewman

86. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
We Can’t Rekomend
Brakes’!
Right Now!
Rekomender
Rekomender
v124
v200
Smoke Test
Manual Circuit Breaker
GOTO: Aarhus 2012
@samnewman

87. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
Brakes’!
Rekomender
Rekomender
v124
v200
Smoke Test
Manual Circuit Breaker
GOTO: Aarhus 2012
@samnewman

88. GOTO: Aarhus 2012
@samnewman

89. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
Brakes’!
Rekomender
v124
Async Behaviour
GOTO: Aarhus 2012
@samnewman

90. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
Brakes’!
Async Behaviour
GOTO: Aarhus 2012
@samnewman

91. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
Brakes’!
Async Behaviour
GOTO: Aarhus 2012
@samnewman

92. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
Waiting...
Brakes’!
Async Behaviour
GOTO: Aarhus 2012
@samnewman

93. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
Waiting...
Brakes’!
Rekomender
v200
Async Behaviour
GOTO: Aarhus 2012
@samnewman

94. www.MusikShop
MusikShop v1
Queens Of The
Stone Age
Take That
Snoop Dogg
We Rekomend ‘The
Brakes’!
Rekomender
v200
Async Behaviour
GOTO: Aarhus 2012
@samnewman

95. GOTO: Aarhus 2012
@samnewman

96. Things to watch for...
GOTO: Aarhus 2012
@samnewman

97. The Trifle
GOTO: Aarhus 2012
@samnewman

98. Musik Web
The Trifle
GOTO: Aarhus 2012
@samnewman

99. Musik Web
Persistence
The Trifle
GOTO: Aarhus 2012
@samnewman

100. Musik Web
Persistence
The Trifle
GOTO: Aarhus 2012
@samnewman

101. Musik Web
Persistence
The Trifle
GOTO: Aarhus 2012
@samnewman

102. Musik Web
Persistence
The Trifle
GOTO: Aarhus 2012
@samnewman

103. GOTO: Aarhus 2012
@samnewman

104. GOTO: Aarhus 2012
@samnewman

105. GOTO: Aarhus 2012
@samnewman

106. The Spider
GOTO: Aarhus 2012
@samnewman

107. CD Ordering
System
The Spider
GOTO: Aarhus 2012
@samnewman

108. Whitemail System
CD Ordering
System
The Spider
GOTO: Aarhus 2012
@samnewman

109. Whitemail System
Data Wharehouse
CD Ordering
System
The Spider
GOTO: Aarhus 2012
@samnewman

110. Whitemail System
Data Wharehouse
CD Ordering
System
3rd Party Supplier
The Spider
GOTO: Aarhus 2012
@samnewman

111. Whitemail System
Data Wharehouse
CD Ordering
System
Finance System
3rd Party Supplier
The Spider
GOTO: Aarhus 2012
@samnewman

112. Whitemail System
Dumb System 1
Dumb System 2
Data Wharehouse
CD Ordering
System
Dumb System 4
Finance System
Dumb System 3
3rd Party Supplier
The Spider
GOTO: Aarhus 2012
@samnewman

113. GOTO: Aarhus 2012
@samnewman

114. GOTO: Aarhus 2012
@samnewman

115. “A set of capabilities on an
endpoint”
GOTO: Aarhus 2012
@samnewman

116. GOTO: Aarhus 2012
@samnewman

117. Add to cart
GOTO: Aarhus 2012
@samnewman

118. Add to cart
Checkout
GOTO: Aarhus 2012
@samnewman

119. Add to cart
Checkout
GOTO: Aarhus 2012
View Latest
Releases
@samnewman

120. Search
Add to cart
Checkout
GOTO: Aarhus 2012
View Latest
Releases
@samnewman

121. Search
Add to cart
Checkout
View Latest
Releases
Listen To Previews
GOTO: Aarhus 2012
@samnewman

122. Checkout
Add to cart
Search
View Latest
Releases
Listen To Previews
GOTO: Aarhus 2012
@samnewman

123. Checkout
Shopping Cart
Add to cart
Search
View Latest
Catalog
Releases
Music Library
Listen To Previews
GOTO: Aarhus 2012
@samnewman

124. Model Services Based
On Your Business
Domain
GOTO: Aarhus 2012
@samnewman

125. Musik
Shop
v1
Reko.
v9
GOTO: Aarhus 2012
@samnewman

126. Musik
Shop
v1
Musik
Shop
v1
Reko.
v9
Reko.
v10
Internal
Change
GOTO: Aarhus 2012
@samnewman

127. Musik
Shop
v1
Musik
Shop
v1
Musik
Shop
v1
Reko.
v9
Reko.
v10
Reko.
v10
Internal
Change
Expansion
GOTO: Aarhus 2012
@samnewman

128. Musik
Shop
v1
Musik
Shop
v1
Musik
Shop
v1
Musik
Shop
v2
Reko.
v9
Reko.
v10
Reko.
v10
Reko.
v10
Expansion
Interface
Change
Internal
Change
GOTO: Aarhus 2012
@samnewman

129. Rekomender V9
v1
Musik
Shop
GOTO: Aarhus 2012
@samnewman

130. Rekomender V9
Non-breaking expansion
is to be preferred - but
if you can’t...
v1
Musik
Shop
GOTO: Aarhus 2012
@samnewman

131. Rekomender V9
v1
Non-breaking expansion
is to be preferred - but
if you can’t...
v2
Musik
Shop
GOTO: Aarhus 2012
@samnewman

132. Rekomender V9
v1
Non-breaking expansion
is to be preferred - but
if you can’t...
v2
Consider maintaining
multiple service
endpoints
Musik
Shop
GOTO: Aarhus 2012
iOS
App
@samnewman

133. Rekomender V9
v1
Non-breaking expansion
is to be preferred - but
if you can’t...
v2
Consider maintaining
multiple service
endpoints
Musik
Shop
GOTO: Aarhus 2012
iOS
App
@samnewman

134. Service A
Shared Lib v1
Service B
Shared Lib v1
GOTO: Aarhus 2012
@samnewman

135. Service A
Shared Lib v1
Service B
Shared Lib v1
GOTO: Aarhus 2012
@samnewman

136. Service A
Shared Lib v1
Service B
Shared Lib v1
GOTO: Aarhus 2012
@samnewman

137. Service A
Shared Lib v1
v2
Service B
Shared Lib v1
GOTO: Aarhus 2012
@samnewman

138. Service A
Shared Lib v1
v2
Beware of shared
serialization protocols
Service B
Shared Lib v1
GOTO: Aarhus 2012
@samnewman

139. Service A
Shared Lib v1
v2
WSDL-binding
Beware of shared
serialization protocols
Service B
Shared Lib v1
GOTO: Aarhus 2012
@samnewman

140. Service A
Shared Lib v1
v2
WSDL-binding
JAXB
GOTO: Aarhus 2012
Beware of shared
serialization protocols
Service B
Shared Lib v1
@samnewman

141. Service A
Shared Lib v1
v2
WSDL-binding
JAXB
Java Serialization
GOTO: Aarhus 2012
Beware of shared
serialization protocols
Service B
Shared Lib v1
@samnewman

142. RFC 761
GOTO: Aarhus 2012
@samnewman

143. Postel’s Law:
“Be conservative in what you do, be liberal in
what you expect“
GOTO: Aarhus 2012
@samnewman

144. MusikShop
Rekomender
Consumer Driven Contracts
GOTO: Aarhus 2012
@samnewman

145. MusikShop
Rekomender
Consumer Driven Contracts
GOTO: Aarhus 2012
@samnewman

146. MusikShop
Rekomender
Consumer Driven Contracts
GOTO: Aarhus 2012
@samnewman

147. MusikShop
Rekomender
Consumer Driven Contracts
GOTO: Aarhus 2012
@samnewman

148. DATABASES!
GOTO: Aarhus 2012
@samnewman

149. DATA IS COOL
GOTO: Aarhus 2012
@samnewman

150. DATABASES ARE EVIL
GOTO: Aarhus 2012
@samnewman

151. Rekomender
MusikShop
DB Schema
GOTO: Aarhus 2012
@samnewman

152. MusikShop
Rekomender
DB Schema
GOTO: Aarhus 2012
@samnewman

153. MusikShop
Rekomender
DB Schema
GOTO: Aarhus 2012
@samnewman

154. MusikShop
Rekomender
Schema
Schema
DB Instance
GOTO: Aarhus 2012
@samnewman

155. Each service owns its own data
MusikShop
Rekomender
Schema
Schema
DB Instance
GOTO: Aarhus 2012
@samnewman

156. MusikShop
Rekomender
RDMS
RDMS
GOTO: Aarhus 2012
@samnewman

157. MusikShop
Rekomender
RDMS
RDMS
Riak
GOTO: Aarhus 2012
@samnewman

158. Rekomender
RDBMS
Riak
GOTO: Aarhus 2012
@samnewman

159. Rekomender
Release 1:
Dual Write
RDBMS
GOTO: Aarhus 2012
Riak
@samnewman

160. Rekomender
Release 2:
Read from Riak
Release 1:
Dual Write
RDBMS
GOTO: Aarhus 2012
Riak
@samnewman

161. Rekomender
Release 3:
Retire RDMS
Release 2:
Read from Riak
Release 1:
Dual Write
Riak
GOTO: Aarhus 2012
@samnewman

162. MusikShop
Rekomender
GOTO: Aarhus 2012
@samnewman

163. MusikShop
Rekomender
GOTO: Aarhus 2012
AceSuggest
@samnewman

164. MusikShop
Rekomender
GOTO: Aarhus 2012
AceSuggest
@samnewman

165. MusikShop
Rekomender
GOTO: Aarhus 2012
Dark Launching!
AceSuggest
@samnewman

166. Decompose Your Systems
Model Your Domain
Get Interfaces Right
Seperate Deployment From Release
GOTO: Aarhus 2012
@samnewman

167. Questions?
GOTO: Aarhus 2012
@samnewman

168. Thanks!
@samnewman
We’re hiring!
GOTO: Aarhus 2012
@samnewman