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BREAKING OUT OF THE FEAR CYCLE
I A N T H O M A S | L A M B D A C O N F 2 0 1 8

2Ian Thomas | @anatomic | Breaking Out Of The Fear Cycle | Lambdaconf 2018
HOW MANY “9”s
ARE ENOUGH?

Breaking Out Of The Fear Cycle (LambdaConf 2018)

4
BRITAIN’S MOST
POPULAR ONLINE
BOOKMAKER
Over 2m customers
11m financial transactions every Saturday
50m real-time updates every day
Ian Thomas | @anatomic | Breaking Out Of The Fear Cycle | Lambdaconf 2018

5
20,890BETS PER MINUTE
GRAND NATIONAL 2018

7
A CHRISTMAS TALE…

11
WHAT IS THE FEAR CYCLE?

13
“The vicious cycle is completed when one of
those local kludges is responsible for someone
else’s “What? I didn’t know that!” moment. At
this point, the fear cycle is self-sustaining. The
cost of even small changes will continue to
increase without limit.”
– Michael Nygard, The Fear Cycle

14
HOW DO YOU KNOW YOU’RE IN IT?

17
WARTS AND KNOBS

20
WE FAVOURED INHERITANCE OVER COMPOSITION

24
“Object-oriented programming offers a
sustainable way to write spaghetti code. It lets
you accrete programs as a series of patches.”
– Paul Graham

25
WE WANT TO “GO FAST”

26
Availability Associated Downtime Per Year
99% 87 hours and 39 minutes
99.9% 8 hours and 46 minutes
99.99% 53 minutes
99.999% 5 minutes
99.9999% 32 seconds
WE WANT FOUR NINES

27
(99.99/100)()
= 99.85%
0.15% of 2.734 requests ≈ 4= errors
> 1 ℎ@AB C@D4EF=G GHIℎ =@4Eℎ
FOR AN APP WHICH DEPENDS ON 15 SERVICES

INTRODUCING FUNCTIONAL PROGRAMMING PRINCIPLES
A R A D I C A L P I V O T T O W A R D S A N E W T A R G E T A R C H I T E C T U R E

29
“...You should be able to get all the functionality
you need just by assembling existing
components through object composition.”
Gamma et al, 1994

30
J ∘ L

32
WHAT DO YOU DO WHEN STARTING FROM
SCRATCH ISN’T AN OPTION?

33
BREAKING OUT OF THE FEAR CYCLE

34https://twitter.com/MrAndyButcher/status/938700462668337152Ian Thomas | @anatomic | Breaking Out Of The Fear Cycle | Lambdaconf 2018

ONE TEAM,
WORKING WITHOUT
BOUNDARIES
NO MORE “US AND THEM”, OPS AND
ENGINEERING ARE NOW TWO SIDES OF
THE SAME COIN

37
BE PRAGMATIC, BE PRACTICAL

42
SHOW THE BENEFITS OF YOUR APPROACH

45
WE ONLY HAD
SIXWEEKSIan Thomas | @anatomic | Breaking Out Of The Fear Cycle | Lambdaconf 2018

46https://twitter.com/LeoBazzz/status/977107376657584128Ian Thomas | @anatomic | Breaking Out Of The Fear Cycle | Lambdaconf 2018

51
CHALLENGES IN ADOPTING NEW TECHNOLOGIES

53
SCALING TEAMS MAKES ALIGNMENT HARDER

54
EDUCATION & EVANGELISM

58
LEVEL UP YOUR ONBOARDING AND SHARE
KNOWLEDGE OUTSIDE YOUR IMMEDIATE TEAM

59
REDUCE THE AMOUNT OF OPTIONS

61
CHOOSE YOUR TOOLS WISELY

63
MAKE TRIALING NEW IDEAS CHEAP AND LOW RISK

66
LET’S REPHRASE THE OPENING QUESTION…

HOW DO WE GET
FOUR NINES,
HAPPY
CUSTOMERS,
HAPPY
DEVELOPERS
AND MAKE
MONEY?

68
INTRODUCE
FUNCTIONAL
PROGRAMMING
PICK SOMETHING SMALL
GET IT INTO PRODUCTION
REPEAT

69
WORK AS A TEAM
SCALING SOFTWARE IS HARD,
SCALING TEAMS IS EVEN
HARDER. PUT EXTRA EFFORT
INTO ALIGNMENT, EDUCATION
AND EVANGELISM.

70
DELIVER REAL
VALUE TO THE
BUSINESS
NOTHING GIVES GREATER
CREDIBILITY THAN DATA
PROVING YOUR
APPROACH WORKS.

71
“When people talk about traveling to the past,
they worry about radically changing the
present by doing something small, but barely
anyone in the present really thinks that they
can radically change the future by doing
something small.”
- Shower Thoughts

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Breaking Out Of The Fear Cycle (LambdaConf 2018)

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