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Scrum
startup
coding
know
ledg
e
leadership
story
challenge
desire
UX
planning
Efficien
cy
UX
think
skills
qualities
leaning
set
desire
needs
energy
members
wants
manager
done
Efficien
cy
Agile
qualities
planninglead
ersh
ip need
s
manager
energy
thinkwants
LearningTeamrequired
Practice
pair
testing
requ
ired
workshopDesigner
Programmer
economic
Changeinternet
reform
reco
nfigur
ation
refo
rmrefo
rm ux
leadership
econ
omic
economicthink
reform
reform
Designer
Designer
need
sco
ding
leadership
Teamlean
think
qualities
manager
manager
manager
Reconfiguration
Set
reconfigurationProg
rammer
scrum
Scrum
Scrum
Skills
Peop
le
desireUX
thinkqualities
AgileWantsneeds
reform UXworkshop energy
Designer
Wants
Design
think
done
DesignWants
SetReconfiguration
Scrum
startup
coding
know
ledg
e
leadership
story
challengedesireplanning
Efficien
cy
UX
think
skills
energy
leaning
set
desireneeds
energy
members
wants
manager
doneAgile
qualities
planning
lead
ersh
ip
need
s
manager
energy
think
wants
LearningTeamproduct
Practice pair
testing
requ
ired
workshop
Designer
Programmer
economic
Change
internet
reform
reco
nfigur
ation
refo
rm
refo
rmux
leadership
econ
omic
economicthink
reform
reform
Designer
Designer
need
s
leadership
Teamlean
set
wants
manager
manager
manager
Reconfiguration
Set
reconfigurationProg
rammer
scrum
Scrum scrumSkills
Peop
le
desire
UX
thinkqualities
Agile
Wants
needs
reformUXworkshop
energy
Designer
Wants
Design
think
done
DesignWants
SetReconfiguration
Set
agile
wants
think
know
ledg
e
wants
skills
plan
pair
think
done
Scru
m
Set
reformAgilelean
Pragmatic � Extreme � ProgrammingJuven � Xu � 许晓斌
Regional Scrum Gathering® Shanghai 2014
@juvenxu!http://www.juvenxu.com
Programmer & Agile Coach
Extreme Programming (XP) is a software development methodology which is intended to improve software quality and
responsiveness to changing customer requirements.
Regional Scrum Gathering® Shanghai 2014
Regional Scrum Gathering® Shanghai 2014
Kent Beck!Martin Fowler!James Shore!Ron Jeffries!
…
Regional Scrum Gathering® Shanghai 2014
Do You Remember The Values?
Regional Scrum Gathering® Shanghai 2014
simplicity
respect
feedback
communication
courage
Values
Regional Scrum Gathering® Shanghai 2014
feedback
feedback
feedback
feedback
feedback
simplicity
simplicity
simplicity
courage
courage
respect
respect
communication
communication
communication
communicationcommunication
communication
simplicity
respect
feedback
communication
courage
Regional Scrum Gathering® Shanghai 2014
respect
How Do We Follow The Values?
Here is our story…
Regional Scrum Gathering® Shanghai 2014
A product supporting alibaba.com & aliexpress.com
Regional Scrum Gathering® Shanghai 2014
5000 query per second & 500MB network traffic at peak
Regional Scrum Gathering® Shanghai 2014
• We have 3 people for all business analysis, architecture, coding, testing work, and some operation work.!!
• High availability is a must, our service down almost means sites down.!!
• Business keeps growing, which means new requirements coming and users growing.
Challenges
Regional Scrum Gathering® Shanghai 2014
simplicity
(‾口‾)!! !19 svn repositories for 1 project? !
Are you serious?
Regional Scrum Gathering® Shanghai 2014
simplicity
Let’s follow the industry standard.
Regional Scrum Gathering® Shanghai 2014
• Much less learning costs — imagine when programmers grows 2x in 1 year!
!
• No need to invest on customizing tools !!
• Much easier to use open source tools
Follow The Convention, Keep It Simple
Regional Scrum Gathering® Shanghai 2014
We need streamed file download support!
In 2 weeks!
The Way Requirements Usually Comes:
Regional Scrum Gathering® Shanghai 2014
The Way We Usually React:
Ok, let’s do it. (god knows how much time it takes)
Ok, let’s do it, but we need 2 months.
Sorry, don’t you see I’m already very busy?
Regional Scrum Gathering® Shanghai 2014
communicationWhy you need streamed file download support?
We need to play audios and videos.
In what scenario you need this feature?
We have mobile users, they want to send audios and videos.
Mobiles users, hmm… what is the size of the audios/videos?
Let me think, … 5mb at most, usually no more than 2 mb.
Then you don’t need streamed file download, just download it and play it locally.
Regional Scrum Gathering® Shanghai 2014
respect our customers
• Think code as the last way to solve a problem
more code == more code to maintain more feature == more complexmore complex == less stable
more complex == harder to change
simplicity
Regional Scrum Gathering® Shanghai 2014
Regional Scrum Gathering® Shanghai 2014
Regional Scrum Gathering® Shanghai 2014
Regional Scrum Gathering® Shanghai 2014
• TDD, CI, ATDD/BDD, Pair are great for getting feedback.!!
• But we need more, mainly from Ops point of view.
Regional Scrum Gathering® Shanghai 2014
user’s behaviour
Regional Scrum Gathering® Shanghai 2014
availability of our dependency
Regional Scrum Gathering® Shanghai 2014
img cluster
img-compress cluster
fileserver2-content cluster
task: merge 2 clusters
• For saving network traffic (>3GB/s) and machines (>30 4core VM)!• Legacy code with 100+ apache regex url rewrite rules!• Service must not get down during migration.
Regional Scrum Gathering® Shanghai 2014
courage
LETS DO IT!
We have the because:
• We believe it’s valuable.!• We spend days parsing real access log and from which make many test cases.!• We use canary deployment to minimize risks.
respect our users
simplicity
respect
feedback
communication
courage
Values
Regional Scrum Gathering® Shanghai 2014
Scrum
startup
coding
know
ledg
e
leadership
story
challenge
desire
UX
planning
Efficien
cy
UX
think
skills
qualities
leaning
set
desire
needs
energy
members
wants
manager
done
Efficien
cy
Agile
qualities
planninglead
ersh
ip need
s
manager
energy
thinkwants
LearningTeamrequired
Practice
pair
testing
requ
ired
workshopDesigner
Programmer
economic
Changeinternet
reform
reco
nfigur
ation
refo
rmrefo
rm ux
leadership
econ
omic
economicthink
reform
reform
Designer
Designer
need
sco
ding
leadership
Teamlean
think
qualities
manager
manager
manager
Reconfiguration
Set
reconfigurationProg
rammer
scrum
Scrum
Scrum
Skills
Peop
le
desireUX
thinkqualities
AgileWantsneeds
reform UXworkshop energy
Designer
Wants
Design
think
done
DesignWants
SetReconfiguration
Scrum
startup
coding
know
ledg
e
leadership
story
challengedesireplanning
Efficien
cy
UX
think
skills
energy
leaning
set
desireneeds
energy
members
wants
manager
doneAgile
qualities
planning
lead
ersh
ip
need
s
manager
energy
think
wants
LearningTeamproduct
Practice pair
testing
requ
ired
workshop
Designer
Programmer
economic
Change
internet
reform
reco
nfigur
ation
refo
rm
refo
rmux
leadership
econ
omic
economicthink
reform
reform
Designer
Designer
need
s
leadership
Teamlean
set
wants
manager
manager
manager
Reconfiguration
Set
reconfigurationProg
rammer
scrum
Scrum scrumSkills
Peop
le
desire
UX
thinkqualities
Agile
Wants
needs
reformUXworkshop
energy
Designer
Wants
Design
think
done
DesignWants
SetReconfiguration
Set
agile
wants
think
know
ledg
e
wants
skills
plan
pair
think
done
Scru
m
Set
reformAgilelean
Thank � YouJuven � Xu � 许晓斌