PaperMC/Spigot-Server-Patches/0169-Auto-Save-Improvements.patch

From 7009c675aa0448da9b79227a32c72afccfaf79c4 Mon Sep 17 00:00:00 2001
From: Aikar <aikar@aikar.co>
Date: Mon, 19 Sep 2016 23:16:39 -0400
Subject: [PATCH] Auto Save Improvements

Makes Auto Save Rate setting configurable per-world. If the auto save rate is left -1, the global bukkit.yml value will be used.

Process auto save every tick instead of once per auto tick interval, so that chunk saves will distribute over many ticks instead of all at once.

Re-introduce a cap per tick for auto save (Spigot disabled the vanilla cap) and make it configurable.

diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
index fb67306..eacb1f6 100644
--- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
+++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
@@ -2,6 +2,7 @@ package com.destroystokyo.paper;
 
 import java.util.List;
 
+import net.minecraft.server.MinecraftServer;
 import org.bukkit.Bukkit;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.spigotmc.SpigotWorldConfig;
@@ -377,4 +378,19 @@ public class PaperWorldConfig {
     private void elytraHitWallDamage() {
         elytraHitWallDamage = getBoolean("elytra-hit-wall-damage", true);
     }
+
+    public int autoSavePeriod = -1;
+    private void autoSavePeriod() {
+        autoSavePeriod = getInt("auto-save-interval", -1);
+        if (autoSavePeriod > 0) {
+            log("Auto Save Interval: " +autoSavePeriod + " (" + (autoSavePeriod / 20) + "s)");
+        } else if (autoSavePeriod < 0) {
+            autoSavePeriod = MinecraftServer.getServer().autosavePeriod;
+        }
+    }
+
+    public int maxAutoSaveChunksPerTick = 24;
+    private void maxAutoSaveChunksPerTick() {
+        maxAutoSaveChunksPerTick = getInt("max-auto-save-chunks-per-tick", 24);
+    }
 }
diff --git a/src/main/java/net/minecraft/server/Chunk.java b/src/main/java/net/minecraft/server/Chunk.java
index 683a6dd..2314ce0 100644
--- a/src/main/java/net/minecraft/server/Chunk.java
+++ b/src/main/java/net/minecraft/server/Chunk.java
@@ -960,11 +960,9 @@ public class Chunk {
             if (this.t && this.world.getTime() != this.lastSaved || this.s) {
                 return true;
             }
-        } else if (this.t && this.world.getTime() >= this.lastSaved + MinecraftServer.getServer().autosavePeriod * 4) { // Spigot - Only save if we've passed 2 auto save intervals without modification
-            return true;
         }
-
-        return this.s;
+        // This !flag section should say if s(isModified) or t(hasEntities), then check auto save
+        return ((this.s || this.t) && this.world.getTime() >= this.lastSaved + world.paperConfig.autoSavePeriod); // Paper - Make world configurable and incremental
     }
 
     public Random a(long i) {
diff --git a/src/main/java/net/minecraft/server/ChunkProviderServer.java b/src/main/java/net/minecraft/server/ChunkProviderServer.java
index 3828da7..7e53fee 100644
--- a/src/main/java/net/minecraft/server/ChunkProviderServer.java
+++ b/src/main/java/net/minecraft/server/ChunkProviderServer.java
@@ -1,5 +1,6 @@
 package net.minecraft.server;
 
+import com.destroystokyo.paper.PaperConfig;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
 import it.unimi.dsi.fastutil.longs.Long2ObjectMap;
@@ -265,7 +266,7 @@ public class ChunkProviderServer implements IChunkProvider {
                 this.saveChunk(chunk);
                 chunk.f(false);
                 ++i;
-                if (i == 24 && !flag && false) { // Spigot
+                if (!flag && i >= world.paperConfig.maxAutoSaveChunksPerTick) { // Spigot - // Paper - Incremental Auto Save - cap max per tick
                     return false;
                 }
             }
diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
index 807ec58..b398ef1 100644
--- a/src/main/java/net/minecraft/server/MinecraftServer.java
+++ b/src/main/java/net/minecraft/server/MinecraftServer.java
@@ -114,6 +114,7 @@ public abstract class MinecraftServer implements Runnable, ICommandListener, IAs
     public final Thread primaryThread;
     public java.util.Queue<Runnable> processQueue = new java.util.concurrent.ConcurrentLinkedQueue<Runnable>();
     public int autosavePeriod;
+    public boolean serverAutoSave = false; // Paper
     // CraftBukkit end
 
     public MinecraftServer(OptionSet options, Proxy proxy, DataConverterManager dataconvertermanager, YggdrasilAuthenticationService yggdrasilauthenticationservice, MinecraftSessionService minecraftsessionservice, GameProfileRepository gameprofilerepository, UserCache usercache) {
@@ -751,22 +752,26 @@ public abstract class MinecraftServer implements Runnable, ICommandListener, IAs
             this.q.b().a(agameprofile);
         }
 
-        if (autosavePeriod > 0 && this.ticks % autosavePeriod == 0) { // CraftBukkit
             this.methodProfiler.a("save");
+
+        serverAutoSave = (autosavePeriod > 0 && this.ticks % autosavePeriod == 0); // Paper
+        if (serverAutoSave) { // CraftBukkit // Paper
             this.v.savePlayers();
             // Spigot Start
+        } // Paper - Incremental Auto Saving
+
             // We replace this with saving each individual world as this.saveChunks(...) is broken,
             // and causes the main thread to sleep for random amounts of time depending on chunk activity
             // Also pass flag to only save modified chunks
             server.playerCommandState = true;
             for (World world : worlds) {
-                world.getWorld().save(false);
+                if (world.paperConfig.autoSavePeriod > 0) world.getWorld().save(false); // Paper - Incremental / Configurable Auto Saving
             }
             server.playerCommandState = false;
             // this.saveChunks(true);
             // Spigot End
             this.methodProfiler.b();
-        }
+        //} // Paper - Incremental Auto Saving
 
         this.methodProfiler.a("tallying");
         this.h[this.ticks % 100] = System.nanoTime() - i;
diff --git a/src/main/java/net/minecraft/server/WorldServer.java b/src/main/java/net/minecraft/server/WorldServer.java
index fc33575..81712ff 100644
--- a/src/main/java/net/minecraft/server/WorldServer.java
+++ b/src/main/java/net/minecraft/server/WorldServer.java
@@ -1017,8 +1017,9 @@ public class WorldServer extends World implements IAsyncTaskHandler {
         ChunkProviderServer chunkproviderserver = this.getChunkProviderServer();
 
         if (chunkproviderserver.e()) {
-            org.bukkit.Bukkit.getPluginManager().callEvent(new org.bukkit.event.world.WorldSaveEvent(getWorld())); // CraftBukkit
+            if (flag) org.bukkit.Bukkit.getPluginManager().callEvent(new org.bukkit.event.world.WorldSaveEvent(getWorld())); // CraftBukkit // Paper - Incremental Auto Saving - Only fire event on full save
             timings.worldSave.startTiming(); // Paper
+            if (flag || server.serverAutoSave) { // Paper
             if (iprogressupdate != null) {
                 iprogressupdate.a("Saving level");
             }
@@ -1027,6 +1028,7 @@ public class WorldServer extends World implements IAsyncTaskHandler {
             if (iprogressupdate != null) {
                 iprogressupdate.c("Saving chunks");
             }
+            } // Paper
 
             timings.worldSaveChunks.startTiming(); // Paper
             chunkproviderserver.a(flag);
-- 
2.10.2