Legacy4Server
ModpackA server-side only performance modpack for Legacy4J
Type
Modpack
Modrinth Downloads
1,453
Modrinth ID
OO2g8qCO
Last Updated
Jun 26, 2026
Description
Legacy4Server
A lightweight performance-oriented server-sided modpack for Legacy4J.

Legacy4Server is a fork of the private Re-Console SMP modpack, built for community usage.
This is the general guide for installation.
Download mrpack-install through GitHub releases (or your distro's package if it has one) and take a look at the commands on the README. In Legacy4Server's case, to install in your server you would run:
mrpack-install Legacy4Server [optional version number]It's a good idea to have some knowledge on using Docker before doing this.
- Make sure you have Docker Engine installed properly according to the Docker docs
- Create a new directory
- Place the contents below in a file called docker-compose.yml. This Compose file also contains some other server tweaks meant for performance, such as disabling sync-chunk-writes, reducing render and simulation distance, and more
- Run docker compose up -d in that directory
For any other information, you can read through the Docker Minecraft Server documentation.
services: mc: image: itzg/minecraft-server tty: true stdin_open: true ports: - "25565:25565" environment: EULA: "TRUE" # Adrenaline and other mods MOD_PLATFORM: MODRINTH MODRINTH_DOWNLOAD_DEPENDENCIES: required MODRINTH_MODPACK: legacy4server # this installs the latest version of Legacy4Server, you can also use a specific MR link to a version MODRINTH_PROJECTS: spark, chunky # comma separated list of extra mods # Server properties VIEW_DISTANCE: 8 SIMULATION_DISTANCE: 5 SYNC_CHUNK_WRITES: false # having this set to false will significantly improve performance but may cause desync issues and (extremely rare) data corruption. set to true if you don't have a backup system volumes: # Attach the relative directory 'data' to the container's /data path - ./data:/datamcman is a tool for managing the mods/plugins/configurations of a Minecraft server. First, install mcman from releases. To import Legacy4Server while initializing a server, use this command:
mcman init --mrpack mr:legacy4serverAfter initializing and importing the mrpack, run mcman build to build the server into the server/ directory, from which you can call cd server && sh start.sh or cd server && call start.bat. For more information, check out mcman's docs.
See the mrpack4server Git repository for installation info. modpack-info.json:
{ "project_id": "legacy4server", "version_id": "version id or name" }Features
All the Bells and Whistles...
Legacy4Server comes with all the features from Legacy4J, for your server! From the console flight, to proper gamerules.
Nice and Speedy!
Legacy4Server comes with the top tier, cutting edge performance mods found in modpacks like Re-Console+, Simply Legacy, Additive, and more. It may cut your servers RAM usage in half, and allow you to play with more people!
Compatibility with Vanilla
Legacy4Server, via DexrnZacAttack's mod, ModernRegSyncFix, allows vanilla clients to play any server running Legacy4Server.
Free Support
Legacy4Server comes with free support offered by the developers of Lasting Legacy. If you have a bug, please report it on our GitHub Issues.
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Compatibility
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Contained Mods (22)
Fabric API
Core API library for the Fabric toolchain
FerriteCore
Memory usage optimizations
Lithium (Fabric/NeoForge)
An optimization mod for Minecraft which improves server performance significantly.
Concurrent Chunk Management Engine (Fabric)
A Fabric mod designed to improve the chunk performance of Minecraft.
Preferred Gamerules
Light-weight mod for changing the default values of gamerules.
ServerCore
A mod that aims to optimize the minecraft server.
Immersive Optimization
A lightweight entity-tick-scheduler for doubling your TPS.
ScalableLux
A Fabric mod based on Starlight that improves the performance of light updates in Minecraft.
Krypton
A mod to optimize the Minecraft networking stack
Legacy4J
This mod adapts all the features from old Minecraft Legacy Console edition
No Prying Eyes
Provides full control over your data; namely telemetry and chat reporting.
Customizable Player Models
Customize your minecraft avatar!
ModernFix-mVUS
A fork of ModernFix that adds minor version update support.
Fast Noise
This optimizes noise generation
Very Many Players (Fabric)
A Fabric mod designed to improve server performance at high playercounts.
Factory API
An API that supports different mod loaders and is the basis of mods like Factocrafty
TT20 (TPS Fixer)
TT20 helps reduce lag by optimizing how ticks work when the server's TPS is low.
KryptonFNP Patcher
Optimize the network and provide additional support for Krypton Fabric.
LazyAI
Optimizes Minecraft mob AI by scaling calculations based on distance to players, improving performance with as minimal g...
ModernRegSyncFix
A fork of RegSyncFix for modern versions of Minecraft. RegSyncFix is a simple Fabric mod that bypasses errors during re...
Oxidizium
Rewrites parts of Minecraft in Rust Lang
C2ME OpenCL Acceleration Module
C2ME addon that provides hardware accelerated world generation through OpenCL
