name: arch_decisions router_kit: DevOpsKit description: ADR template, database selection, capacity planning ve scalability. metadata: skillport: category: thinking tags: [arch decisions, architecture, automation, best practices, clean code, coding, collaboration, compliance, debugging, design patterns, development, documentation, efficiency, git, optimization, productivity, programming, project management, quality assurance, refactoring, software engineering, standards, testing, utilities, version control, workflow] - arch-patterns

📋 Architecture Decisions

ADR, database selection ve capacity planning.

📝 ADR Template

# ADR-001: Database Selection

## Status: Accepted

## Context
[Problem açıklaması]

## Decision
PostgreSQL kullanacağız.

## Consequences
### Positive
- ACID compliance
### Negative
- Horizontal scaling zor

## Alternatives
- MongoDB: Rejected - JOINs için uygun değil

🗄️ Database Selection

📊 Capacity Planning

DAU: 1M users
Requests: 20/user/day = 20M/day
RPS: 20M / 86400 = ~230 RPS
Peak: 230 × 3 = ~700 RPS

Architecture Decisions v1.0

🔄 Workflow

Kaynak: AWS Architecture Blog

Aşama 1: Problem Identification

• Context: Problemi ve etkilerini net tanımla.
• Constraints: Kısıtlamaları (Bütçe, Zaman, Teknoloji) belirle.
• Options: En az 2 alternatif çözüm yolu belirle.

Aşama 2: Proposal (Status: Proposed)

• Draft: ADR şablonunu doldur.
• RFC: Takımdan yorum iste (Pull Request veya Toplantı).
• Evaluation: Alternatifleri kriterlere göre puanla (Pros/Cons).

Aşama 3: Decision (Status: Accepted/Rejected)

• Consensus: Kararı netleştir ve statüyü güncelle.
• Implications: Kararın uzun vadeli etkilerini (Consequences) yaz.
• Commit: ADR dosyasını repoya ekle.

Kontrol Noktaları