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How to choose the right music for different tasks
The benefits of listening to music while working
How music affects productivity
First Law Of Software Architecture
There are always trade offs
Achieve least worst architecture
Characteristics
- Availability
- Reliability
- Testability
- Scalability
- Security
- Agility
- Fault tolerance
- Elasticity
- Recoverability
- Performance
- Deployability
- Learn ability
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Identifying Architecture Characteristics
Architecture partitioning
- Technical / Layered (all repositories, models, controllers in separate folders)
- Domain / Modular (logic is organised by feature, sliced across models, controllers, repositories)
Conway law
- Organisations are constrained to produce designs which are copies of communication structures of these organisations
Component Design
- Action/actors approach
- Event storming - relies on messages
- Work flow approach
Architecture style
- Monolithic
- Layered
- Pipeline
- Microkernel
- Distributed
- Service based
- Event driven
- Space based
- Service oriented
- Microservices
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Architecture Fallacies
When considering distributed architecture
- Network is not always reliable
- Latency is never zero
- Bandwidth is not infinite
- Transport cost is not zero
- Network not always secure
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Monolithic Architecture
1. Layered / N tiered architecture
- Components are organised into logical horizontal layers (eg. Presentation layer, business layer, persistence layer, database)
Pros
- Good for small simple apps or Web sites where budget is tight and time is short
Cons
- Deployability, Low elasticity and scalability
2. Pipeline Architecture
- Eg. Filter pipe Filter pipe
- Pipes form the communication channel, is unidirectional, point to point
- Filters - producer, transformer, tester, consumer
3. Micro kernel Architecture
Product based applications (packaged for installation on consumer)
Core system and Plug in components
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Distributed Architecture
1. Service based architecture
- Partitioned/driven by domain
- Some UI, independent domain services, monolithic database (or multiple)
- If shared db, then use shared library for database entity objects
2. Event driven
- Asynchronous, highly scalable, high performance
- Mediator topology
- Broker topology - rabbitMQ, no need Central event orchestration
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