perf: ⚡ seperate web and queue workers

.config/example.yml

@@ -143,11 +143,11 @@ reservedUsernames: [
 # Whether disable HSTS
 #disableHsts: true
 
-# Number of worker processes
-#clusterLimit: 1
-
-# Worker only mode
-#onlyQueueProcessor: 1
+# Number of worker processes by type.
+# The sum must not exceed the number of available cores.
+#clusterLimits:
+#  web: 1
+#  queue: 1
 
 # Job concurrency per worker
 # deliverJobConcurrency: 128

packages/backend/src/boot/index.ts

@@ -19,7 +19,12 @@ const ev = new Xev();
  * Init process
  */
 export default async function () {
-	process.title = `Firefish (${cluster.isPrimary ? "master" : "worker"})`;
+	const mode =
+		process.env.mode && ["web", "queue"].includes(process.env.mode)
+			? `(${process.env.mode})`
+			: "";
+	const type = cluster.isPrimary ? "(master)" : "(worker)"
+	process.title = `Firefish ${mode} ${type}`;
 
 	if (cluster.isPrimary || envOption.disableClustering) {
 		await masterMain();

packages/backend/src/boot/master.ts

@@ -111,7 +111,7 @@ export async function masterMain() {
 	bootLogger.succ("Firefish initialized");
 
 	if (!envOption.disableClustering) {
-		await spawnWorkers(config.clusterLimit);
+		await spawnWorkers(config.clusterLimits);
 	}
 
 	bootLogger.succ(
@@ -120,7 +120,11 @@ export async function masterMain() {
 		true,
 	);
 
-	if (!envOption.noDaemons && !config.onlyQueueProcessor) {
+	if (
+		!envOption.noDaemons &&
+		config.clusterLimits?.web &&
+		config.clusterLimits?.web >= 1
+	) {
 		import("../daemons/server-stats.js").then((x) => x.default());
 		import("../daemons/queue-stats.js").then((x) => x.default());
 		import("../daemons/janitor.js").then((x) => x.default());
@@ -136,7 +140,7 @@ function showEnvironment(): void {
 
 	if (env !== "production") {
 		logger.warn("The environment is not in production mode.");
-		logger.warn("DO NOT USE FOR PRODUCTION PURPOSE!", null, true);
+		logger.warn("DO NOT USE THIS IN PRODUCTION!", null, true);
 	}
 }
 
@@ -194,19 +198,33 @@ async function connectDb(): Promise<void> {
 	}
 }
 
-async function spawnWorkers(limit = 1) {
-	const workers = Math.min(limit, os.cpus().length);
-	bootLogger.info(`Starting ${workers} worker${workers === 1 ? "" : "s"}...`);
-	await Promise.all([...Array(workers)].map(spawnWorker));
+async function spawnWorkers(
+	clusterLimits: Required<Config["clusterLimits"]>,
+): Promise<void> {
+	const modes = ["web", "queue"];
+	const cpus = os.cpus().length;
+	for (const mode of modes.filter((mode) => clusterLimits[mode] > cpus)) {
+		bootLogger.warn(
+			`configuration warning: cluster limit for ${mode} exceeds number of cores (${cpus})`,
+		);
+	}
+
+	const total = modes.reduce((acc, mode) => acc + clusterLimits[mode], 0);
+	const workers = new Array(total);
+	workers.fill("web", 0, clusterLimits?.web);
+	workers.fill("queue", clusterLimits?.web);
+
+	bootLogger.info(`Starting ${clusterLimits?.web} web workers and ${clusterLimits?.queue} queue workers (total ${total})...`);
+	await Promise.all(workers.map((mode) => spawnWorker(mode)));
 	bootLogger.succ("All workers started");
 }
 
-function spawnWorker(): Promise<void> {
+function spawnWorker(mode: "web" | "queue"): Promise<void> {
 	return new Promise((res) => {
-		const worker = cluster.fork();
+		const worker = cluster.fork({ mode });
 		worker.on("message", (message) => {
 			if (message === "listenFailed") {
-				bootLogger.error("The server Listen failed due to the previous error.");
+				bootLogger.error("The server listen failed due to the previous error.");
 				process.exit(1);
 			}
 			if (message !== "ready") return;

packages/backend/src/boot/worker.ts

@@ -1,6 +1,7 @@
 import cluster from "node:cluster";
 import { initDb } from "../db/postgre.js";
 import config from "@/config/index.js";
+import os from "node:os";
 
 /**
  * Init worker process
@@ -8,13 +9,20 @@ import config from "@/config/index.js";
 export async function workerMain() {
 	await initDb();
 
-	if (!config.onlyQueueProcessor) {
+	if (!process.env.mode || process.env.mode === "web") {
 		// start server
 		await import("../server/index.js").then((x) => x.default());
 	}
 
-	// start job queue
-	import("../queue/index.js").then((x) => x.default());
+	if (!process.env.mode || process.env.mode === "queue") {
+		// start job queue
+		import("../queue/index.js").then((x) => x.default());
+
+		if (process.env.mode === "queue") {
+			// if this is an exclusive queue worker, renice to have higher priority
+			os.setPriority(os.constants.priority.PRIORITY_BELOW_NORMAL);
+		}
+	}
 
 	if (cluster.isWorker) {
 		// Send a 'ready' message to parent process

packages/backend/src/config/load.ts

@@ -59,6 +59,23 @@ export default function load() {
 	if (config.cacheServer && !config.cacheServer.prefix)
 		config.cacheServer.prefix = mixin.hostname;
 
+	if (!config.clusterLimits) {
+		config.clusterLimits = {
+			web: 1,
+			queue: 1,
+		};
+	} else {
+		config.clusterLimits = {
+			web: 1,
+			queue: 1,
+			...config.clusterLimits,
+		};
+
+		if (config.clusterLimits.web! < 1 || config.clusterLimits.queue! < 1) {
+			throw new Error("Invalid cluster limits");
+		}
+	}
+
 	return Object.assign(config, mixin);
 }
 

packages/backend/src/config/types.ts

@@ -69,9 +69,10 @@ export type Source = {
 
 	accesslog?: string;
 
-	clusterLimit?: number;
-
-	onlyQueueProcessor?: boolean;
+	clusterLimits?: {
+		web?: number;
+		queue?: number;
+	};
 
 	cuid?: {
 		length?: number;