Download - 02. Arjen de Ruiter, Bol.com
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The value of dataPerformance & scalability
challenges @bol.com
@arjenderuiterSlides with input from Niels Basjes & Edith Kanters
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Topics• Value of data• Scalability &
performance• Tips
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Value: customers find what they are
looking for with search rank
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Value: inspire customers with
product recommendations
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Value: a personal shop full of
inspiration for every customer
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Value: provide us with explicit
feedback on your personal shop
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Everything data
CUSTOMER
Right frequency
Right Event
Right content
Right place
Right promotion
Right timing
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Sprints
Stor
ies
V
alue
ValueStory points/scopeRELEASE
As stories burn down, value increases
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15 million products: not Big Data
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15 million clicks a day: not Big Data
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>3.5TB + >20TB> 10.000.000.000 product combinations: getting bigger!
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It does not fit anymore
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It takes too long
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Scalable processing: it al starts
small
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Big enough and cost effective?
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<schaalbaarheid>
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Economic size
Different models
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Linear horizontal scalability:
start small, end big
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MTBHIAGSD
Value
MTB
HIA
GSD
@andrianco, Netflix
Mean Time Between Having
An Idea And Getting Stuff Done
So deliver fast!
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Launch early & iterate
One of the company rules of thumb at Google is: if you are not embarrassed by your first launch, you have not launched early enough
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Trim the tail, don’t spend time on low value features
Value
Tim
e
Epic 3
Epic 2
Epic 1
Tail … does not add too much additional value
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Measure & act. Fail fast, fail cheap.
A/B testing to find the best variant of a solution
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Our main Big Data conclusion
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