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Native Minecraft Servers using GraalVM Native Image



The Minecraft server can be difficult to set up because it requires a large amount of memory and CPU resources. This project allows you to transform the Minecraft server into a native executable using GraalVM. It is expected to make use of less CPU and memory resources, be more efficient to start, and be simpler to deploy.



A native Minecraft server is smaller than Minecraft's server.jar and the JDK required to run it. With upx compression, the size of the native executable may be reduced even further to less than 40MB which is less than the server.jar. Fela.london Initial tests also showed competitive run-time performance and a smaller footprint for memory. For best results, use GraalVM Enterprise Native Image which provides better performance and lower memory consumption than the Community Edition, and try out the G1 GC and Profile-Guided Optimizations. The Oracle Cloud Free Tier provides four Ampere A1 cores with 24GB of RAM that can be enough to host the Minecraft server. It also provides access to GraalVM Enterprise.



For more details, read this blog post.



Disclaimer This project is intended to be used for demonstration purposes only. It is designed to help the Minecraft community to evaluate the effectiveness of GraalVM Native Image. Use at your own risk



1. Download GraalVM Community or Enterprise (GraalVM 22.2.0 or later is required). Optional: Ensure that upx is installed on your $PATH in order to enable compression. 2. Download or browse this repository, and then run build.sh. 3. Launch the native Minecraft server with ./native-minecraft-server. You must accept Minecraft's EULA the first time you launch the server.



How it works



This project contains only the build.sh script as well as reachability metadata. It also includes instructions for creating an native Minecraft server. The build.sh script downloads Minecraft's server.jar first and extracts the jars it contains. It then invokes GraalVM native image with the correct configuration to create an original Minecraft server. Finally, and only if upx is on the $PATH script, it will compress the native executable.



Limitations and issues that are known



The configuration currently supports Minecraft 1.18.2. - The server GUI isn't implemented as of yet. - Mods are currently not supported. - There is no build script for Windows yet, but the WSL should be able to function. Sometimes the native executable fails to start. It is generally possible to restart it multiple times. Error: com.mojang.datafixers.types.templates.List$ListType cannot be cast to java.lang.Comparable.


Read More: https://fela.london/