Manage data of service
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The document discusses different approaches to data management in microservices architectures, including sharing a single database, having a separate database for each service, and an event-driven approach using event sourcing and sagas. Event sourcing involves storing an immutable sequence of events and using those events to update read models. It allows for decoupling of query and command services but adds complexity and data duplication. The key is understanding the problem and purpose before choosing an approach.
Manage data of service
- 1. © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. Data management In Microservices
- 2. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !2 Data management in Microservices
- 3. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !3 Monolithic Application DB
- 4. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !4 Microservices Service 1 Service 2 Service 3
- 5. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !5 Microservices Service 1 Service 2 Service 3 1. Shared database DB
- 6. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !6 Microservices Service 1 Service 2 Service 3 2. Database per service DBDB DB
- 7. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !7 Database per service High complexity Query data across multiple databases Challenge “How to join data ?” Maintain database consistency
- 8. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !8 How to maintain data consistency across services ?
- 9. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !9 We need … Don’t need distributed transaction Reduce complexity of code Reliable
- 10. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !10 ??? Service 1 Service 2 Service 3 Sequence of Tx and emit event or message that trigger the next process in Tx Event produce consume Event produce consume Timeline
- 11. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !11 ??? Service 1 Service 2 Service 3 Sequence of Tx and emit event or message that trigger the next process in Tx 1. command 2. response 3. command 4. response
- 12. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !12 Message vs Event Message is addressed to someone Event is something that happen and someone can react to that
- 13. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !13 “Saga”
- 14. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !14 Event sourcing Maintain source of truth of business Immutable sequence of events Event Event TimelineEventEvent Event Sequence of event is keep in Event store
- 15. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !15 Event store Keep events in order Broadcast new event Service 1 Service 2 Service 3 Event store produce consume consume
- 16. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !16 With Event sourcing, we can decouple services (query and command)
- 17. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !17 CQRS Command Query Responsibility Segregation
- 18. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !18 CQRS Separate command and query services Command Query Event store produce consume DB
- 19. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !19 Event sourcing with database Working with database Bin log Event storeDB bin log event Binlog or Binary log event is information about data modification made to database Event Event Event
- 20. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !20 Event sourcing Duplication data (denormalize database) Complexity (separate query and command) Difficult to maintain
- 21. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !21 Event sourcing can’t solve all problems
- 22. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !22 Start with understand your purpose
- 23. Data management in Microservices © 2017 - 2018 Siam Chamnankit Company Limited. All rights reserved. !23 Start with understand your problem to resolve