What is Rsync?

Rsync is a powerful command-line tool used for fast file transfer and synchronization. It minimizes data transfer by sending only the changed parts of files.

• Delta-transfer algorithm (only changed data transfers)
• Secure transfer via SSH
• Perfect for backups and large file collections
• Faster than traditional FTP and WebDAV uploads
• Ideal for incremental backups

Server Connection

• Host: rsync.filelu.com
• Protocol: rsync over SSH
• Port: 2222
• Username: your FileLu username
• Password: your FileLu password

Works on Linux, macOS, and Windows (WSL, cwRsync, Git Bash).

Important Notes

• Rsync runs in rsync-only mode (no SSH shell access)
• Direct SSH commands are not supported
• Remote paths must start with /
• Folders are created automatically
• Supports resume upload using --partial
• Delta-transfer algorithm (only changed data transfers)
• Designed for large file transfers (handles multi-GB files efficiently)
• Supports uploading large file sets (recommended up to 50,000 files per run)
• Supports multiple concurrent connections (recommended up to 10 sessions)

Performance Tips

• The -z compression option is not supported in this environment. Use standard rsync flags for best performance.
• Use --stats or --progress to monitor transfer performance
• Use --partial to resume interrupted uploads
• Rsync automatically transfers only changed data (delta transfer)
• For large uploads, split files into smaller batches for better performance

Basic Commands

Upload file

Upload folder

Download file

Sync folder

Mirror (exact copy)

Resume upload

Example: Incremental Backup

Rsync transfers only changed data, making it ideal for automated backups.

Limitations

• Symlinks are not preserved
• Hardlinks may not be supported
• No SSH shell access