Advanced System Design¶

Giriş¶

Advanced System Design, large-scale, distributed ve complex sistemlerin tasarımı, implementasyonu ve yönetimi için kritik öneme sahiptir. Senior-level developers için advanced system design konularını anlamak, scalable systems tasarlamak, distributed systems implement etmek ve system architecture optimize etmek için gereklidir. Bu bölüm, distributed systems, event sourcing, CQRS, saga pattern, outbox pattern ve two-phase commit konularını kapsar.

Kapsanan Konular¶

1. Distributed Systems¶

Distributed system design, CAP theorem, consistency models, ve distributed algorithms.

Öğrenilecekler: - CAP theorem - Consistency models - Distributed algorithms - Network partitioning - Failure handling

2. Event Sourcing & CQRS¶

Event-driven architecture, command query responsibility segregation, ve event store.

Öğrenilecekler: - Event sourcing - CQRS pattern - Event store - Event replay - Event versioning

3. Saga Pattern¶

Distributed transaction management, saga orchestration, ve saga choreography.

Öğrenilecekler: - Saga pattern - Saga orchestration - Saga choreography - Compensation logic - Saga monitoring

4. Outbox Pattern¶

Reliable message delivery, transactional outbox, ve message processing.

Öğrenilecekler: - Outbox pattern - Transactional outbox - Message processing - Idempotency - Dead letter queues

5. Two-Phase Commit¶

Distributed transaction coordination, consensus protocols, ve failure recovery.

Öğrenilecekler: - Two-phase commit - Consensus protocols - Failure recovery - Performance optimization - Alternative approaches

Neden Önemli?¶

1. System Scalability¶

Handle large scale
Support growth
Performance optimization
Resource management
Load distribution

2. System Reliability¶

Fault tolerance
High availability
Data consistency
Failure recovery
Disaster recovery

3. Business Requirements¶

Complex workflows
Data integrity
Transaction management
Event processing
Real-time systems

4. Technical Excellence¶

Modern architecture
Best practices
Proven patterns
Performance optimization
Maintainability

Mülakat Soruları¶

Temel Sorular¶

Distributed system nedir?
Cevap: Multiple nodes, network communication, shared state, failure handling.
CAP theorem nedir?
Cevap: Consistency, Availability, Partition tolerance - pick two.
Event sourcing nedir?
Cevap: Store events, replay history, audit trail, temporal queries.
CQRS nedir?
Cevap: Command Query Responsibility Segregation, separate read/write models.
Saga pattern nedir?
Cevap: Distributed transaction management, compensation logic, failure handling.

Teknik Sorular¶

Distributed system nasıl tasarlanır?
Cevap: Network topology, communication protocols, failure handling, consistency models.
Event sourcing nasıl implement edilir?
Cevap: Event store, event handlers, event replay, event versioning.
Saga pattern nasıl çalışır?
Cevap: Saga definition, orchestration/choreography, compensation logic, monitoring.
Outbox pattern neden kullanılır?
Cevap: Reliable messaging, transactional consistency, idempotency, failure handling.
Two-phase commit nasıl optimize edilir?
Cevap: Performance tuning, failure handling, alternative protocols, monitoring.

Best Practices¶

1. Distributed System Design¶

Design for failure
Implement retry logic
Use circuit breakers
Monitor network latency
Plan for scaling

2. Event Sourcing Implementation¶

Design event schema
Implement event handlers
Plan for event replay
Handle event versioning
Monitor event processing

3. CQRS Implementation¶

Separate read/write models
Optimize read models
Handle eventual consistency
Implement caching
Monitor performance

4. Saga Pattern Implementation¶

Design saga steps
Implement compensation
Handle failures
Monitor saga execution
Plan for rollback

5. Outbox Pattern Implementation¶

Ensure transactional consistency
Handle message processing
Implement idempotency
Monitor message delivery
Plan for failure recovery