# Database

## Backend Selection

```yaml
backend: "SQLITE"
```

| Backend      | Use Case                                 |
| ------------ | ---------------------------------------- |
| `SQLITE`     | เซิร์ฟเวอร์เล็ก (< 50 คน) ไม่ต้องตั้งค่า |
| `MYSQL`      | เซิร์ฟเวอร์กลาง (50-200 คน)              |
| `MARIADB`    | เหมือน MySQL                             |
| `POSTGRESQL` | เซิร์ฟเวอร์ใหญ่ (200+ คน)                |
| `MONGODB`    | NoSQL, รองรับ Atlas/Replica Set          |
| `H2`         | Embedded Java DB                         |

## SQLite (Default)

```yaml
sqlite:
  file: "data.db"
  journal-mode: "WAL"
  synchronous: "NORMAL"
```

ไม่ต้องตั้งค่าอะไรเพิ่ม ใช้งานได้ทันที

## MySQL / MariaDB

```yaml
mysql:
  host: "localhost"
  port: 3306
  database: "cakeprotect"
  username: "root"
  password: "your_password"
  table-prefix: "cp_"
  use-ssl: false
  pool:
    maximum-pool-size: 10
    minimum-idle: 2
```

## PostgreSQL

```yaml
postgresql:
  host: "localhost"
  port: 5432
  database: "cakeprotect"
  username: "postgres"
  password: "your_password"
  schema: "public"
  table-prefix: "cp_"
```

## MongoDB

```yaml
mongodb:
  uri: "mongodb://localhost:27017"
  database: "cakeprotect"
  collections:
    regions: "regions"
  auto-index: true
```

รองรับ connection string แบบ:

* Local: `mongodb://localhost:27017`
* Auth: `mongodb://user:pass@host:27017/db?authSource=admin`
* Atlas: `mongodb+srv://user:pass@cluster.mongodb.net/db`

## Redis (Cache Layer)

```yaml
redis:
  enabled: false
  host: "localhost"
  port: 6379
  password: ""
  secret: "CHANGE_ME_TO_RANDOM_SECRET"
```

{% hint style="danger" %}
ต้องเปลี่ยน `secret` จาก default! ใช้สำหรับ HMAC signing ป้องกัน packet ปลอม
{% endhint %}

## Backup

```yaml
backup:
  enabled: true
  interval-minutes: 360
  max-backups: 7
  folder: "backups"
  compress: true
```

## Migration

ย้ายข้อมูลระหว่าง backend:

```
/ps admin migrate <source> <target>
```


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