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# Disk Reorganizer — Architectural Summary

## Core Outcome

Migration from **SQLite → PostgreSQL** completed.
System is now **network-capable**, **auditable**, **scalable**, and offers **real-time operational telemetry**.

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## Architecture

### Database Layer (PostgreSQL)

* Central DB: `disk_reorganizer_db`
* User: `disk_reorg_user`
* Tables: `files`, `operations`
* Features: indexes, triggers, conflict-upserts, audit fields
* Deployment: SQL + Windows/Linux setup scripts

### Application Layer

* Python driver migrated to **psycopg2**
* Unified DB config + connection pooling
* Refactored CRUD + batch commits
* Robust error handling + transactional execution

### Operational Layer

* **Dynamic in-screen logging** during indexing + migration

  * File/sec, GB processed, ETA, success/error counters
  * Clean single-line, non-spamming UI updates

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## Workflow

1. **Setup**

```json
     {
  "host": "192.168.1.159",
  "port": 5432,
  "database": "disk_reorganizer_db",
  "user": "disk_reorg_user",
  "password": "heel-goed-wachtwoord"
}
```
   ```bash
   ./setup_database.sh      # or setup_database.bat
   pip install -r requirements.txt
   ```

2. **Index**

   ```bash
   python src/main.py index "D:\\" disk_d
   ```

3. **Plan**

   ```bash
   python src/main.py plan disk_d disk_e
   ```

4. **Dry-Run**

   ```bash
   python src/main.py execute plan.json --dry-run
   ```

5. **Execute**

   ```bash
   python src/main.py execute plan.json
   ```

6. **Report**

   ```bash
   python src/main.py report
   ```

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## Guarantees

* No destructive actions by default
* Originals preserved
* Every action logged in DB
* Error-resilient, continues safely
* Suitable for millions of file records

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## Failure Points to Check

* PostgreSQL reachable on 5432
* Correct credentials
* Disk permissions
* Python + psycopg2 installed

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## Essence

A lean, safe, high-visibility disk migration tool running on a proper relational backbone, engineered for clarity, scale, and operational certainty.

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