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| 1 | +# Database Migration (SQLite ↔ MySQL) |
| 2 | + |
| 3 | +CoreProtect 23.0+ includes the ability to migrate your database between SQLite and MySQL without losing any data. |
| 4 | + |
| 5 | +> **Note:** Database migration functionality is exclusive to CoreProtect 23.0+ Patreon builds for Patron supporters. |
| 6 | +
|
| 7 | +## Overview |
| 8 | + |
| 9 | +The `/co migrate-db` command allows you to seamlessly transfer all your CoreProtect data from SQLite to MySQL or vice versa. This is particularly useful when: |
| 10 | + |
| 11 | +* Starting with SQLite and wanting to upgrade to MySQL for better performance |
| 12 | +* Moving from MySQL back to SQLite for simpler server setups |
| 13 | +* Transferring data between different server configurations |
| 14 | + |
| 15 | +## Command Usage |
| 16 | + |
| 17 | +| Command | Parameters | Description | |
| 18 | +| --- | --- | --- | |
| 19 | +| `/co migrate-db` | `<sqlite\|mysql>` | Migrate to the specified database type | |
| 20 | + |
| 21 | +**Examples:** |
| 22 | +* `/co migrate-db mysql` - Migrate from SQLite to MySQL |
| 23 | +* `/co migrate-db sqlite` - Migrate from MySQL to SQLite |
| 24 | + |
| 25 | +> **Console Only:** This command can only be executed from the server console, not from in-game. |
| 26 | +
|
| 27 | +--- |
| 28 | + |
| 29 | +## Migration Process |
| 30 | + |
| 31 | +### Step 1: Preparation |
| 32 | + |
| 33 | +**Before starting the migration:** |
| 34 | + |
| 35 | +1. **Ensure your server is running** with your current CoreProtect database |
| 36 | +2. **Backup your existing database** (recommended safety measure) |
| 37 | +3. **Configure your target database** in `config.yml`: |
| 38 | + * For MySQL migration: Set up your MySQL connection details |
| 39 | + * For SQLite migration: Ensure the SQLite file path is configured |
| 40 | +4. **Important:** Do NOT restart your server or use `/co reload` after modifying the config |
| 41 | + |
| 42 | +### Step 2: Execute Migration |
| 43 | + |
| 44 | +1. **Run the migration command** from your server console: |
| 45 | + ``` |
| 46 | + co migrate-db <target_type> |
| 47 | + ``` |
| 48 | + |
| 49 | +2. **Monitor the progress:** |
| 50 | + * The migration will display detailed progress information |
| 51 | + * Large databases may take considerable time to complete |
| 52 | + * Progress bars and speed indicators will show current status |
| 53 | + |
| 54 | +3. **Do not interrupt the process:** |
| 55 | + * Avoid restarting your server during migration |
| 56 | + * Let the process complete naturally |
| 57 | + |
| 58 | +### Step 3: Post-Migration |
| 59 | + |
| 60 | +**After successful completion:** |
| 61 | + |
| 62 | +1. **Automatic switchover:** CoreProtect will automatically begin using the new database |
| 63 | +2. **Verify configuration:** Ensure `use-mysql` is set correctly in your `config.yml` |
| 64 | +3. **Test functionality:** Perform basic CoreProtect operations to verify everything works |
| 65 | +4. **Clean up:** Once satisfied, you may manually delete your old database files |
| 66 | + |
| 67 | +--- |
| 68 | + |
| 69 | +## Important Considerations |
| 70 | + |
| 71 | +### Migration Safety |
| 72 | + |
| 73 | +* **Non-destructive process:** The migration does not modify or delete your existing database |
| 74 | +* **Rollback capability:** If something goes wrong, simply delete the new database and continue using the old one |
| 75 | +* **Data verification:** The process includes automatic verification to ensure data integrity |
| 76 | + |
| 77 | +### Performance & Requirements |
| 78 | + |
| 79 | +* **Processing time:** Large databases with millions of records may take hours to migrate |
| 80 | +* **Resource usage:** The migration process is resource-intensive and may impact server performance |
| 81 | +* **Parallel processing:** SQLite to MySQL migrations use optimized parallel processing for better speed |
| 82 | + |
| 83 | +### Restrictions & Limitations |
| 84 | + |
| 85 | +* **Console only:** Cannot be executed from in-game chat |
| 86 | +* **Single direction:** Cannot migrate to the same database type currently in use |
| 87 | +* **Interruption handling:** If interrupted, the target database must be manually wiped before restarting |
| 88 | +* **Patreon exclusive:** Only available in CoreProtect 23.0+ Patreon builds |
| 89 | + |
| 90 | +--- |
| 91 | + |
| 92 | +## Troubleshooting |
| 93 | + |
| 94 | +### Common Issues |
| 95 | + |
| 96 | +**Migration won't start:** |
| 97 | +* Verify you're using a CoreProtect 23.0+ Patreon build |
| 98 | +* Ensure you're not trying to migrate to the same database type |
| 99 | +* Check that no other CoreProtect operations are running |
| 100 | + |
| 101 | +**Migration interrupted:** |
| 102 | +* Manually delete/wipe the target database |
| 103 | +* Verify server stability before restarting migration |
| 104 | +* Consider migrating during low-activity periods |
| 105 | + |
| 106 | +**Performance issues:** |
| 107 | +* Monitor server resources during migration |
| 108 | +* Consider temporarily reducing server activity |
| 109 | +* Large tables may cause temporary slowdowns |
| 110 | + |
| 111 | +**Data verification failures:** |
| 112 | +* Check database connectivity and permissions |
| 113 | +* Review server logs for specific error messages |
| 114 | +* Ensure sufficient disk space on target database |
| 115 | + |
| 116 | +### Getting Help |
| 117 | + |
| 118 | +If you encounter issues with database migration: |
| 119 | + |
| 120 | +1. **Check server logs** for detailed error messages |
| 121 | +2. **Verify database permissions** and connectivity |
| 122 | +3. **Ensure adequate system resources** (RAM, CPU, disk space) |
| 123 | +4. **Contact support** through the CoreProtect Discord with specific error details |
| 124 | + |
| 125 | +--- |
| 126 | + |
| 127 | +## Technical Details |
| 128 | + |
| 129 | +The migration process includes several advanced features: |
| 130 | + |
| 131 | +* **Batch processing** with dynamic sizing based on performance |
| 132 | +* **Automatic retry** mechanisms for temporary failures |
| 133 | +* **Data integrity verification** comparing source and target records |
| 134 | +* **Progress tracking** with estimated completion times |
| 135 | +* **Graceful error handling** with detailed logging |
| 136 | + |
| 137 | +The migration handles all CoreProtect data types including: |
| 138 | +* Block changes and rollbacks |
| 139 | +* Container transactions |
| 140 | +* Player interactions and sessions |
| 141 | +* Chat messages and commands |
| 142 | +* User data and statistics |
| 143 | +* All metadata and configuration data |
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