shell/plex/BACKUP-SYSTEM-TRANSITION.md

# Plex Backup System Transition Summary

**Date:** June 21, 2025  
**Author:** Peter Wood <peter@peterwood.dev>

## 🔄 Transition Overview

The Plex backup system has been transitioned from custom scripts to Plex's built-in scheduled backup functionality to reduce complexity and improve reliability.

## ✅ Changes Made

### 1. **Disabled Custom Backup Cron Jobs**
- ✅ Removed daily Plex backup job (4:15 AM)
- ✅ Removed daily integrity check job (6:00 AM)  
- ✅ Removed daily backup validation job (7:00 AM)
- ✅ Removed weekly backup report job (Sunday 8:00 AM)

### 2. **Plex Built-in Backup System Active**
- ✅ **Frequency:** Every 3 days (automatic)
- ✅ **Location:** Database directory + NAS mount `/mnt/share/media/backups/plex`
- ✅ **Pattern:** `*.backup.YYYYMMDD_HHMMSS`
- ✅ **Current Status:** Active with 1 backup file found

### 3. **Updated Documentation**
- ✅ Updated README.md to reflect backup system changes
- ✅ Marked custom backup scripts as disabled/limited use
- ✅ Added new utility script: `check-plex-builtin-backups.sh`
- ✅ Updated Quick Start and Best Practices sections

### 4. **Scripts Status Change**

| Script | Previous Status | New Status |
|--------|----------------|------------|
| `backup-plex.sh` | Active (daily cron) | ❌ **DISABLED** (emergency manual use only) |
| `validate-plex-backups.sh` | Active (daily cron) | ⚠️ **LIMITED USE** (legacy backups only) |
| `monitor-plex-backup.sh` | Active monitoring | ⚠️ **LIMITED USE** (basic system monitoring) |
| `plex-db-manager.sh` | Active | ✅ **ACTIVE** (manual health checks) |
| `nuclear-plex-recovery.sh` | Emergency use | ✅ **ACTIVE** (emergency recovery) |
| `plex.sh` | Service management | ✅ **ACTIVE** (service management) |
| `check-plex-builtin-backups.sh` | N/A | ⭐ **NEW** (monitor built-in backups) |

## 🎯 Current Recommended Workflow

### Daily Operations (Automated)
- **Plex Built-in Backups:** Run automatically every 3 days
- **No manual intervention required**

### Weekly Operations (Manual)
```bash
# Health check
./plex-db-manager.sh check

# Check backup status  
./check-plex-builtin-backups.sh

# Service status
./plex.sh status
```

### Emergency Procedures (Unchanged)
```bash
# Database issues
./plex-db-manager.sh check
./plex.sh restart
sudo ./nuclear-plex-recovery.sh --dry-run
sudo ./nuclear-plex-recovery.sh --auto

# Validation after recovery
./validate-plex-recovery.sh
```

## 📊 Benefits of This Change

### ✅ **Advantages**
1. **Reduced Complexity:** Fewer moving parts and scripts to maintain
2. **Native Integration:** Plex handles its own backup timing and lifecycle
3. **Elimination of Conflicts:** No risk of custom scripts interfering with Plex
4. **Simplified Monitoring:** One tool (`check-plex-builtin-backups.sh`) for status
5. **Lower Maintenance:** No custom cron schedules to manage

### ⚠️ **Considerations**
1. **Less Control:** Cannot customize backup frequency (fixed at 3 days)
2. **Limited Validation:** Cannot validate Plex backups with external tools
3. **Dependency:** Reliant on Plex's backup implementation working correctly

## 🔍 Monitoring Built-in Backups

### New Utility Script
```bash
./check-plex-builtin-backups.sh          # Basic status
./check-plex-builtin-backups.sh --detailed # Detailed information
```

### Manual Commands
```bash
# Check latest backup
ls -lath "/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Plug-in Support/Databases/"*.backup.* | head -1

# List all backups
find "/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Plug-in Support/Databases" -name "*.backup.*" -exec ls -lah {} \;

# Check backup age
stat "/var/lib/plexmediaserver/Library/Application Support/Plex Media Server/Plug-in Support/Databases/"*.backup.* | grep Modify
```

## 📁 File System Changes

### Cron Configuration
- **File:** `/home/acedanger/shell/crontab/crontab-europa.txt`
- **Status:** Plex backup entries commented out/disabled
- **Applied:** Yes (via `manage-enhanced-crontab.sh install`)

### Custom Backup Files
- **Location:** `/mnt/share/media/backups/plex/plex-backup-*.tar.gz`
- **Status:** Legacy files preserved for historical reference
- **Count:** 5 files found (from previous custom backup system)

### Built-in Backup Files
- **Location:** `/var/lib/plexmediaserver/.../Databases/*.backup.*`
- **Current:** 1 active backup file found
- **Latest:** `com.plexapp.plugins.library.db.backup.20250621_063833` (149M)

## 🚨 Emergency Access

### If Built-in Backups Fail
Custom backup scripts remain available for emergency use:
```bash
# Emergency backup creation
./backup-plex.sh --non-interactive --disable-auto-repair

# Emergency validation
./validate-plex-backups.sh --latest
```

### Recovery Procedures
- **Nuclear recovery:** `nuclear-plex-recovery.sh` unchanged
- **Service management:** `plex.sh` unchanged  
- **Health checks:** `plex-db-manager.sh` unchanged

## 📋 Testing Results

### Backup Status Check (June 21, 2025)
```
✅ Plex database directory found
✅ Found 1 built-in backup file(s)
📅 Latest backup: 2025-06-21 06:38:56 (149M)
✅ NAS backup directory accessible
📦 Found 5 legacy custom backup files
✅ Custom backup system: DISABLED
✅ Plex built-in backups: ACTIVE
```

### Cron Verification
```bash
$ sudo crontab -l | grep -E "(plex|backup)"
# Returns: No active Plex backup cron jobs (successfully disabled)
```

## 📞 Rollback Plan

If Plex built-in backups prove unreliable, the custom system can be re-enabled:

1. **Uncomment cron entries** in `/home/acedanger/shell/crontab/crontab-europa.txt`
2. **Re-apply crontab:** `./manage-enhanced-crontab.sh install`
3. **Update README.md** to reflect re-enabled status
4. **Monitor both systems** until transition is complete

## 🏁 Conclusion

The transition to Plex built-in backups simplifies the backup architecture while maintaining all emergency recovery capabilities. The system is now more aligned with Plex's native functionality and reduces the risk of script conflicts that contributed to previous database corruption issues.

**Status:** ✅ **TRANSITION COMPLETE**  
**Next Review:** July 21, 2025 (1 month follow-up)