Architecting a Modern Minecraft Network: Velocity, Paper, and Purpur in Harmony

Architecting a Modern Minecraft Network: Velocity, Paper, and Purpur in Harmony

As Minecraft server communities grow, the limitations of a single, monolithic server often become apparent. Performance bottlenecks, the desire for diverse game modes, and the need for seamless player transitions necessitate a more sophisticated approach: a networked server architecture. This guide delves into architecting a modern Minecraft network using the industry-leading components: Velocity as your proxy, and Paper or Purpur for your backend game servers. This combination offers unparalleled performance, scalability, and flexibility, ensuring a superior player experience.

Why a Networked Architecture?

A single Minecraft server, while suitable for smaller communities or specific game types, struggles under heavy player loads or when attempting to host multiple distinct game experiences (like a survival world, a minigames arena, and a creative server) simultaneously. A networked setup, often referred to as a "BungeeCord" or "proxy" network, addresses these challenges by:

- Distributing player load across multiple backend servers, preventing a single server from becoming a bottleneck.
- Allowing players to effortlessly switch between different game modes or worlds without disconnecting.
- Enhancing security by obscuring the IP addresses of backend servers from direct player connections.
- Providing a centralised lobby or hub experience, acting as a gateway to your diverse server offerings.

Velocity: The Modern Proxy Standard

For years, BungeeCord was the de facto standard for Minecraft proxies. However, the landscape has evolved, and Velocity, developed by the PaperMC team, has emerged as the superior choice for any modern Minecraft network.

Velocity significantly outperforms its predecessors, BungeeCord and Waterfall, offering up to eight times better performance. This remarkable efficiency stems from its modern design and asynchronous operations, which minimise latency and maximise throughput even with hundreds or thousands of concurrent players. Beyond raw speed, Velocity brings a suite of advantages:

- Enhanced Security: Velocity acts as a robust firewall, protecting your backend servers from direct attacks and ensuring player authentication is handled securely at the proxy level.
- Superior Stability: Its modern codebase is less prone to crashes and exploits, providing a more reliable foundation for your network.
- Dedicated Plugin Ecosystem: While it connects to Spigot/Paper/Purpur plugins, Velocity also has its own plugin ecosystem, allowing for proxy-level features like custom commands, player statistics across servers, and advanced anti-bot measures.
- Native Forge Support: For those running modded networks, Velocity offers native Forge compatibility, a significant advantage over older proxies.

Implementing Velocity means establishing a central entry point for all players. When a player connects to your network's single IP address, they first land on the Velocity proxy, which then directs them to a designated default backend server (typically a lobby or hub). From there, players can use commands or in-game portals to seamlessly transition to other connected game servers.

Choosing Your Backend: PaperMC vs. PurpurMC

Once Velocity handles the network's front end, you need robust backend servers to host your actual gameplay. The choice typically boils down to PaperMC or PurpurMC, both highly optimised forks of the original Spigot server software.

PaperMC: The Dependable Foundation

PaperMC is widely regarded as the default choice for performance-oriented Minecraft servers. It builds upon Spigot by implementing hundreds of optimisations that significantly reduce lag and improve overall server responsiveness. Key features include:

- Asynchronous Chunk Loading: Reduces world loading impact on the main server thread.
- Optimised Light Engine: A common source of lag in vanilla Minecraft is drastically improved.
- Hopper and Entity Optimisations: Intelligent handling of items and mobs to prevent performance drains.
- Expanded API: Offers developers more tools to create powerful and efficient plugins.
- Active Community Support: Paper boasts a vast and helpful community, making troubleshooting and finding resources easier.

For most server owners, PaperMC provides an excellent balance of performance, stability, and ease of configuration. It is the recommended starting point for any new backend server in your network.

PurpurMC: Pushing the Boundaries of Customisation

PurpurMC is a fork of Paper, meaning it includes all of Paper's optimisations and then adds hundreds more. Purpur is designed for server owners who demand maximum control and are willing to delve into a more complex configuration. Its additional features include:

- Hundreds of Configuration Options: Fine-tune almost every aspect of gameplay, mob behaviour, and server mechanics.
- Alternative Entity AI: Can offer performance gains in scenarios with heavy mob activity through more efficient pathfinding and AI processing.
- Extra Asynchronous Optimisations: Further reduces main thread load, particularly for chunk I/O and complex entity interactions.
- Specific Gameplay Tweaks: Features like custom spawn rates, hunger drain adjustments, and anti-lag mechanisms tailored for specific scenarios.

While Purpur can offer marginal performance improvements over Paper in highly specific, often heavily loaded scenarios, its primary benefit lies in its extensive customisation. However, this comes with increased configuration complexity. If you're a seasoned administrator looking to squeeze every last drop of performance or implement highly specific gameplay changes, Purpur might be worth the effort. For most, Paper's performance and simpler management are sufficient.

Integrating the Components: A Practical Approach

Building your Velocity network involves a logical sequence of steps:

1. Prepare Your Backend Servers:
- Choose either PaperMC or PurpurMC for each of your game servers (e.g., a Paper survival server, a Purpur minigames server).
- Ensure Java is correctly installed. For optimal performance, especially with modern Minecraft versions, use Java 21 or later.
- Configure each backend server with a unique port number.
- Crucially, set online-mode to true in server.properties and enable ip-forwarding in your spigot.yml (or paper.yml/purpur.yml) to ensure player IP addresses are correctly forwarded by Velocity. This is vital for moderation plugins.

2. Set Up Velocity:
- Download the latest Velocity proxy JAR file from the PaperMC website.
- Create a dedicated directory for your Velocity instance.
- Run Velocity once to generate the velocity.toml configuration file.
- Edit velocity.toml:
- Define your bind address (usually 0.0.0.0:25565 for the default Minecraft port).
- Crucially, set player-info-forwarding to BUNGEECORD (despite its name, this is the correct setting for Velocity to forward player data securely to Paper/Purpur backends).
- List your backend servers under the servers section, providing a unique name, IP address, and port for each.
- Set your forced-hosts and try servers to define where players land by default or when joining specific subdomains.

3. Connect Backend Servers to Velocity:
- Ensure your backend servers are not directly accessible from the internet. They should only accept connections from your Velocity proxy. This typically involves firewall rules or ensuring they listen on an internal-only IP address if on the same machine.
- Start Velocity, then start your backend servers. Players will now connect through Velocity.

Performance Considerations in a Networked Environment

While Velocity handles network traffic efficiently, backend server performance remains critical.

- JVM Tuning: For each Paper/Purpur backend, apply Aikar's Flags for Java Virtual Machine (JVM) tuning. These flags are specifically designed to optimise garbage collection and memory allocation, drastically reducing lag spikes. Ensure your -Xms (minimum heap size) equals -Xmx (maximum heap size) to prevent dynamic resizing, which can cause pauses.
- Resource Allocation: Allocate sufficient RAM to both Velocity and your backend servers. While Velocity itself is lightweight, backend game servers are RAM-hungry. For shared hosting, reserve 1000-1500MB for the operating system.
- Hardware: Ensure your server hardware (CPU, RAM, storage I/O, network bandwidth) can comfortably handle the combined load of Velocity and all active backend servers. SSDs are highly recommended for world storage.

Security in a Networked Environment

Beyond Velocity's inherent protections, consider these points:

- Firewall Rules: Block direct access to your backend server ports from the public internet. Only allow connections from your Velocity server.
- Strong Passwords: For SFTP, SSH, and any web panel access.
- Plugin Security: Only use trusted plugins from reputable sources. Keep them updated.

Scalability and Future-Proofing

A Velocity-based network provides excellent scalability. As your community grows:

- Add More Backend Servers: Easily introduce new game modes or additional instances of existing ones (e.g., a second survival server).
- Load Balancing: Velocity can be configured to distribute players across multiple instances of the same game mode, further enhancing capacity.
- Dedicated Hardware: As your network expands, consider moving individual backend servers to dedicated hardware for isolated performance.

Architecting your Minecraft server with Velocity as the proxy and Paper or Purpur for your backend servers provides a robust, high-performance, and scalable foundation for any growing community. This modern setup ensures smooth gameplay, diverse experiences, and easier management for administrators. If you're looking to run a high-performance, multi-server network without the hassle of managing infrastructure, consider a managed hosting provider like PixelRaid Hosting, which can provide optimised environments for Velocity and your backend servers.

Sources and further reading

- PaperMC News: https://papermc.io/news
- PaperMC Docs: https://docs.papermc.io/paper/
- ChunkArc: "Paper vs Purpur: Which Is Better for Your Server?" https://chunkarc.com/guides/paper-vs-purpur/
- Reddit r/admincraft: "What are the advantages of Purpurmc over Papermc?" https://www.reddit.com/r/admincraft/comments/rz047n/what_are_the_advantages_of_purpurmc_over_papermc/
- WiseHosting: "Minecraft Velocity: What It Is & Why It's So Fast" https://wisehosting.com/blog/minecraft-velocity/
- MCServerHost: "How to Set Up a Velocity" https://mcserverhost.com/guides/how-to-set-up-a-velocity