Mesoservices - Sjoerd Cranen - Codemotion Amsterdam 2017

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Microservice based architectures are the de-facto standard for newly written software. At Picnic, we developed a large number of services ranging from frontend shopping services to backend supply chain services. All services are tightly integrated, scalable, and highly adaptable. However, this leads also to less clean APIs, unwanted dependencies, extra development time, and instability. In this talk, we explain how we deviated from a dogmatic approach to microservices towards mesoservices with less service granularity for faster development and shorter time-to-market.

Mesoservices
Sjoerd Cranen, Picnic
AMSTERDAM 16 - 17 MAY 2017

Architecture for optimal trade-off
between engineering
and operations efficiency
“
”

Picnic
Gateway
Distribution planning
Vehicle routing
Warehouse management
Purchasing
Users
Orders
Stock
Comm
Finance
CatalogAdmin pages
Real-time analytics
Workforce planning
Slack integration
Pricing
Product search

Microservices
§ Isolation!
§ Scalability!
§ CICD!
§ New technologies!
§ Move fast at large scale!

Microservices
§ Separation of concerns: overhead
§ CI/CD: big investment
§ Do 1 thing: what thing?
§ Company structure: small team
§ Variation in technology: bus factor

Picnic now Picnic later
§ Small team
§ Time to market
§ Product focus
§ Operations efficiency
§ Many small teams
§ AI-first
§ Platform focus
§ Stable model

Tech strategy: AI-first Retail Platform
SYSTEMS OF ENGAGEMENT
SYSTEMS OF RECORD & INTERACTION
DWH
DistributionE-Commerce Planning Fulfillment
SYSTEMS OF INTELLIGENCE

07-2014
Meso
Docker
Microservices?
WMS
Layers
2015 2016 2017 2018
?

Meso, what’s micro?
§ Separation of concerns
§ API first
§ Messaging & HTTP
§ Collection per service (sort of)

Meso, what’s not micro?
§ Multiple services per deployment
§ Weekly release
§ Limited tech stack

Tough nuts
§ Data ownership
§ Transactions
§ Client libraries

Divide while conquering
When:
§ Domain clear
§ Team available
§ Change necessary

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A central challenge for today's IT is how to ensure business agility and how to keep the robustness of core business functionalities. A microservice-based architecture in conjunction with APIs for decoupling the building blocks becomes more and more important. By using modern container technologies, companies can leverage all the advantages of modern software development. This session covers the impact of modern software architectures based on a real-life scenario, which we implemented to establish faster delivery cycles and to start innovations. Learn different strategies for how modernized software architectures can be introduced. This session is suitable for organizations of any size and industry.

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