Adaptive Server Core (ASC)

Enterprise-Grade Real-Time Performance Core & Adaptive Optimization Engine for Minecraft Servers
Paper | Purpur | Folia | Spigot | Bukkit (1.16 – 1.21+)

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Table of Contents

• 1. About ASC
• 2. Key Features & Modules
  • 2.1 Dynamic & Adaptive Mob Cap (Load-Budget Engine)
  • 2.2 Redstone & Hopper Watchdog (Anti-Lag-Machine)
  • 2.3 Elytra & Chunk Generation Controller
  • 2.4 Chunk Hibernation & Lazy Simulation (asc-lazysim)
  • 2.5 Compatibility Shims & External Plugin Integrations
• 3. Installation
• 4. Commands & Permissions
• 5. In-Game Control Panel (GUI)
• 6. Developer API
• 7. Building from Source
• 8. Compatibility Matrix

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1. About ASC

Adaptive Server Core (ASC) is an intelligent, high-performance optimization core engineered specifically for large open-world RPG, technical, and faction Minecraft servers (e.g. 8K×4K custom maps, hundreds of NPCs, complex redstone systems, and player-driven economies).

Traditional anti-lag plugins resort to crude, destructive measures (hard mob-cap cutoffs, abrupt redstone breaking, clearing named entities, or visual stutter). ASC works differently:

• Under low player counts or ample server headroom (MSPT < 35ms), mob spawn limits smoothly scale up (up to 150%) so the world feels alive and engaging.
• Under heavy server stress, limits gracefully decay using smooth mathematical PID/gradient curves rather than harsh hard cutoffs.
• Automated farms and redstone circuits cannot stall or crash the server, yet remain functional through intelligent pulse throttling.
• Inactive chunks safely hibernate without halting the world: furnaces smelt, crops grow, and villagers restock their trades upon chunk reawakening with zero runtime tick cost!

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2. Key Features & Modules

2.1 Dynamic & Adaptive Mob Cap (Load-Budget Engine)

• Mathematical Load-Budget Model: Entity spawns are regulated against rolling MSPT and TPS metrics.
• Smooth Gradient Scaling: $$\text{Budget}{\text{effective}} = \text{Budget}{\text{base}} \times \left(\frac{\text{TargetMSPT}}{\max(\text{TargetMSPT}, \text{CurrentMSPT})}\right)^{1.8} \times \text{Clamp}\left(\frac{\text{TPS} - 10}{10}, 0, 1\right)$$
• Strict Despawn Whitelist: Custom-named entities (CustomName), tamed animals (Tameable), leashed mobs (Leashed), persistent entities, and entities with passengers or vehicles are strictly protected and never despawned.
• Admin Live HUD: Toggled via /asc mobcap monitor, rendering real-time TPS, MSPT, budget percentage, and total entity counts on BossBar and Action Bar.

2.2 Redstone & Hopper Watchdog (Anti-Lag-Machine)

• Signature-Based Loop Detection: Identifies rapid oscillating clock circuits (e.g. piston loops, comparator clocks) within localized 3x3x3 volumes.
• Non-Destructive Throttling: Rather than breaking redstone mechanisms, ASC artificially throttles transmission frequency (ThrottleAction.THROTTLE_PULSE), allowing machines to remain functional at safe speeds.
• Hopper Rate Limiter: Tracks item transfers per chunk, enforcing rate limits (default 50 transfers/second) to prevent hopper spam lag machines.
• /asc lagsources: Displays the top-N heaviest chunks with precise coordinates, update rates, and estimated MSPT impact.

2.3 Elytra & Chunk Generation Controller

• High-Speed Flight Detection: Tracks players gliding with Elytra at velocities $v > 0.8$ blocks/tick and computes their trajectory vector $(\Delta x, \Delta z)$.
• Predictive Pre-Generation: Asynchronously pre-generates ahead-of-time candidate chunks during low MSPT periods so players do not experience border lag.
• Dynamic View & Simulation Distance: Automatically scales view and simulation distance smoothly based on MSPT load ($\pm 1$ chunk every 10 seconds to prevent pop-in artifacts).

2.4 Chunk Hibernation & Lazy Simulation (asc-lazysim)

The heaviest burden on Minecraft servers is keeping inactive chunks loaded in RAM. ASC allows chunks to unload freely, applying lightweight delta catch-up math upon reawakening:

1. Furnaces, Smokers, and Blast Furnaces: Calculates fuel consumption and items smelted over elapsed time, updating inventories without overflowing output stacks.
2. Agriculture & Crops: Simulates growth stages for wheat, carrots, potatoes, beetroot, and sugar cane using deterministic hydration and lighting formulas.
3. Villager Trading Restocks: Restores trade uses based on elapsed Minecraft day cycles ($1\text{ day} = 1200\text{ seconds}$).
4. Animal Maturation & Breeding: Advances baby animal ages to adulthood and resets breeding cooldowns.
5. Beehives & Bee Nests: Increments honey levels according to daylight hours.
6. Extensible Plugin API: Third-party plugins can register custom handlers using the LazySimulatable interface.

2.5 Compatibility Shims & External Plugin Integrations

• WorldGuard: Hooks region boundaries for per-region mob limits and trusted technical zones.
• Chunky: Relaxes chunk generation throttles while background pre-generation jobs are actively running.
• ClearLag & LaggRemover: Automatically switches to COMPATIBILITY_REDUCED mode, suppressing duplicate despawn tasks to prevent double-hook conflicts.
• PlaceholderAPI: Registers %asc_tps%, %asc_mspt%, %asc_budget%, %asc_hibernating_chunks%, and more.
• MythicMobs: Automatically whitelists custom RPG bosses and mobs from despawn passes.
• /asc diagnose: Generates a comprehensive diagnostic report of active shims and platform status.

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3. Installation

ASC is distributed in two formats:

1. Universal Jar (AdaptiveServerCore-Universal.jar): Single jar compatible with Folia, Paper, Purpur, Spigot, and Bukkit. Detects the host platform automatically at runtime.
2. Platform-Specific Jars: Dedicated jars (e.g. AdaptiveServerCore-Paper-1.21.jar) tailored specifically for modern Paper/Folia environments.

Steps:

1. Place the JAR file into your server's plugins/ directory.
2. Start the server or run /asc reload.
3. Configure your desired thresholds in plugins/AdaptiveServerCore/config.yml.

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4. Commands & Permissions

All administrative commands require the asc.admin permission:

Command	Description
/asc gui	Opens the 54-slot interactive chest control panel
/asc status	Displays real-time TPS, MSPT, load budget, and chunk states
/asc diagnose	Runs a compatibility diagnostic scan and reports active shims
/asc lagsources [limit]	Displays top server lag sources ranked by estimated MSPT impact
/asc mobcap get	Displays current dynamic mob caps for each category
/asc mobcap monitor	Toggles the real-time BossBar / Action Bar monitor HUD
/asc profile save <name>	Saves current runtime settings as a named profile
/asc profile load <name>	Loads and applies a saved performance profile (e.g. event, low-spec)
/asc profile list	Lists all available performance profiles
/asc lazysim stats	Displays stats on tracked hibernating chunks and processors
/asc lazysim purge	Prunes expired or stale hibernation records from SQLite
/asc reload	Hot-reloads all configuration files without a server restart
/asc help	Displays the command reference guide

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5. In-Game Control Panel (GUI)

The /asc gui command opens an interactive 54-slot chest interface:

• Performance Beacon: Displays live TPS, MSPT, and budget multiplier in lore.
• Module Toggle Buttons: Lime/Red concrete buttons to toggle MobCap, Redstone Watchdog, Elytra Throttle, and LazySim in real-time.
• Top Lag Sources Compass: Quick overview of the heaviest 3 chunk coordinates.
• Hot-Reload Star: One-click configuration reloading.

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6. Developer API

External plugins can depend on the asc-api module via Maven or Gradle:

dependencies {
    compileOnly("net.modclaim.asc:asc-api:1.0.0-SNAPSHOT")
}

Registering a Custom LazySim Processor:

public class CustomCropProcessor implements LazySimulatable {
    @Override
    public String getId() { return "my_custom_crops"; }

    @Override
    public int getPriority() { return 15; }

    @Override
    public CatchUpResult onCatchUp(CatchUpContext context) {
        Chunk chunk = context.getChunk();
        Duration elapsed = context.getElapsed();
        // Mathematical delta catch-up calculation over elapsed time...
        return new CatchUpResult(getId(), 0, 5, 12000L, true, "Updated 5 custom blocks");
    }

    @Override
    public void onHibernate(Chunk chunk, long epochMs) {
        // Invoked when chunk enters hibernation...
    }
}

// Registration via global provider:
ASCProvider.get().getLazySimService().registerProcessor(new CustomCropProcessor());

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7. Building from Source

Building ASC requires Java 21 and Gradle:

# Run automated tests across all modules:
./gradlew check test

# Package both Universal and platform-specific JARs:
./gradlew shadowJar

Packaged distribution JARs will be generated in:

• asc-loader/build/libs/AdaptiveServerCore-Universal-1.0.0-SNAPSHOT.jar
• asc-platform-paper-latest/build/libs/AdaptiveServerCore-Paper-1.21-1.0.0-SNAPSHOT.jar
• asc-platform-paper-legacy/build/libs/AdaptiveServerCore-Paper-Legacy-1.0.0-SNAPSHOT.jar
• asc-platform-spigot/build/libs/AdaptiveServerCore-Spigot-1.0.0-SNAPSHOT.jar
• asc-platform-bukkit/build/libs/AdaptiveServerCore-Bukkit-1.0.0-SNAPSHOT.jar

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8. Compatibility Matrix

For detailed platform tiers and external plugin integrations, refer to COMPATIBILITY.md.