diff --git a/packages/hydrooj/package.json b/packages/hydrooj/package.json
index 9300fe9ef..0eb57b150 100644
--- a/packages/hydrooj/package.json
+++ b/packages/hydrooj/package.json
@@ -1,6 +1,6 @@
 {
     "name": "hydrooj",
-    "version": "2.34.2",
+    "version": "2.34.3",
     "bin": "bin/hydrooj.js",
     "main": "src/loader",
     "module": "src/loader",
diff --git a/packages/hydrooj/src/entry/worker.ts b/packages/hydrooj/src/entry/worker.ts
index 35ad3decf..66c338533 100644
--- a/packages/hydrooj/src/entry/worker.ts
+++ b/packages/hydrooj/src/entry/worker.ts
@@ -12,7 +12,7 @@ import {
     builtinScript, handler, lib, locale, model, script, service, setting, template, uistatic,
 } from './common';
 
-const logger = new Logger('loader/worker');
+const logger = new Logger('worker');
 const detail = cac().parse().options.loaderDetail;
 const tmpdir = path.resolve(os.tmpdir(), 'hydro');
 
@@ -105,5 +105,7 @@ export async function load() {
             await modelSystem.set('db.ver', dbVer);
         }
     }
+    logger.success('Server started');
+    if (process.send) process.send('ready');
     return { active, fail };
 }
diff --git a/packages/hydrooj/src/model/blacklist.ts b/packages/hydrooj/src/model/blacklist.ts
index e621d38c9..4fe4a338b 100644
--- a/packages/hydrooj/src/model/blacklist.ts
+++ b/packages/hydrooj/src/model/blacklist.ts
@@ -32,10 +32,9 @@ class BlackListModel {
     }
 }
 
-async function ensureIndexes() {
-    return await coll.createIndex('expireAt', { expireAfterSeconds: 0 });
-}
-
-bus.once('app/started', ensureIndexes);
+bus.once('app/started', () => db.ensureIndexes(
+    coll,
+    { key: { expireAt: -1 }, name: 'expire', expireAfterSeconds: 0 },
+));
 export default BlackListModel;
 global.Hydro.model.blacklist = BlackListModel;
diff --git a/packages/hydrooj/src/model/message.ts b/packages/hydrooj/src/model/message.ts
index 1ab928542..ce17bcace 100644
--- a/packages/hydrooj/src/model/message.ts
+++ b/packages/hydrooj/src/model/message.ts
@@ -65,13 +65,10 @@ class MessageModel {
     }
 }
 
-function ensureIndexes() {
-    return Promise.all([
-        coll.createIndex({ to: 1, _id: -1 }),
-        coll.createIndex({ from: 1, _id: -1 }),
-    ]);
-}
-
-bus.once('app/started', ensureIndexes);
+bus.once('app/started', () => db.ensureIndexes(
+    coll,
+    { key: { to: 1, _id: -1 }, name: 'to' },
+    { key: { from: 1, _id: -1 }, name: 'from' },
+));
 export default MessageModel;
 global.Hydro.model.message = MessageModel;
diff --git a/packages/hydrooj/src/model/opcount.ts b/packages/hydrooj/src/model/opcount.ts
index d8e39798f..e22b05775 100644
--- a/packages/hydrooj/src/model/opcount.ts
+++ b/packages/hydrooj/src/model/opcount.ts
@@ -20,12 +20,9 @@ export async function inc(op: string, ident: string, periodSecs: number, maxOper
     }
 }
 
-function ensureIndexes() {
-    return Promise.all([
-        coll.createIndex('expireAt', { expireAfterSeconds: 0 }),
-        coll.createIndex({ op: 1, ident: 1, expireAt: 1 }, { unique: true }),
-    ]);
-}
-
-bus.once('app/started', ensureIndexes);
+bus.once('app/started', () => db.ensureIndexes(
+    coll,
+    { key: { expireAt: -1 }, name: 'expire', expireAfterSeconds: 0 },
+    { key: { op: 1, ident: 1, expireAt: 1 }, name: 'unique', unique: true },
+));
 global.Hydro.model.opcount = { inc };
diff --git a/packages/hydrooj/src/model/record.ts b/packages/hydrooj/src/model/record.ts
index 523f94785..9c8481f45 100644
--- a/packages/hydrooj/src/model/record.ts
+++ b/packages/hydrooj/src/model/record.ts
@@ -234,14 +234,12 @@ bus.on('domain/delete', (domainId) => Promise.all([
     RecordModel.coll.updateMany({ pdomain: domainId }, { $set: { docId: -1 } }),
 ]));
 
-bus.on('app/started', () => {
-    return db.ensureIndexes(
-        RecordModel.coll,
-        { key: { domainId: 1, 'contest.tid': 1, hidden: 1, _id: -1 }, name: 'basic' },
-        { key: { domainId: 1, 'contest.tid': 1, hidden: 1, uid: 1, _id: -1 }, name: 'withUser' },
-        { key: { domainId: 1, 'contest.tid': 1, hidden: 1, pid: 1, _id: -1 }, name: 'withProblem' },
-    );
-});
+bus.once('app/started', () => db.ensureIndexes(
+    RecordModel.coll,
+    { key: { domainId: 1, 'contest.tid': 1, hidden: 1, _id: -1 }, name: 'basic' },
+    { key: { domainId: 1, 'contest.tid': 1, hidden: 1, uid: 1, _id: -1 }, name: 'withUser' },
+    { key: { domainId: 1, 'contest.tid': 1, hidden: 1, pid: 1, _id: -1 }, name: 'withProblem' },
+));
 
 export default RecordModel;
 global.Hydro.model.record = RecordModel;
diff --git a/packages/hydrooj/src/model/setting.ts b/packages/hydrooj/src/model/setting.ts
index 685d89f08..728e1b1aa 100644
--- a/packages/hydrooj/src/model/setting.ts
+++ b/packages/hydrooj/src/model/setting.ts
@@ -163,6 +163,7 @@ SystemSetting(
     Setting('setting_file', 'file.secretKey', null, 'password', 'file.secretKey', 'Storage engine secret', FLAG_SECRET),
     Setting('setting_file', 'file.bucket', 'hydro', 'text', 'file.bucket', 'Storage engine bucket'),
     Setting('setting_file', 'file.region', 'us-east-1', 'text', 'file.region', 'Storage engine region'),
+    Setting('setting_file', 'file.pathStyle', true, 'boolean', 'file.pathStyle', 'pathStyle endpoint'),
     Setting('setting_file', 'file.endPointForUser', '/fs/', 'text', 'file.endPointForUser', 'EndPoint for user'),
     Setting('setting_file', 'file.endPointForJudge', '/fs/', 'text', 'file.endPointForJudge', 'EndPoint for judge'),
     Setting('setting_smtp', 'smtp.user', null, 'text', 'smtp.user', 'SMTP Username'),
diff --git a/packages/hydrooj/src/model/token.ts b/packages/hydrooj/src/model/token.ts
index 6ea539761..728476946 100644
--- a/packages/hydrooj/src/model/token.ts
+++ b/packages/hydrooj/src/model/token.ts
@@ -92,13 +92,10 @@ class TokenModel {
     }
 }
 
-function ensureIndexes() {
-    return Promise.all([
-        TokenModel.coll.createIndex({ uid: 1, tokenType: 1, updateAt: -1 }, { sparse: true }),
-        TokenModel.coll.createIndex('expireAt', { expireAfterSeconds: 0 }),
-    ]);
-}
-
-bus.once('app/started', ensureIndexes);
+bus.once('app/started', () => db.ensureIndexes(
+    TokenModel.coll,
+    { key: { uid: 1, tokenType: 1, updateAt: -1 }, name: 'basic', sparse: true },
+    { key: { expireAt: -1 }, name: 'expire', expireAfterSeconds: 0 },
+));
 export default TokenModel;
 global.Hydro.model.token = TokenModel;
diff --git a/packages/hydrooj/src/model/user.ts b/packages/hydrooj/src/model/user.ts
index dda1a439b..c2c072212 100644
--- a/packages/hydrooj/src/model/user.ts
+++ b/packages/hydrooj/src/model/user.ts
@@ -3,8 +3,9 @@ import LRU from 'lru-cache';
 import { Collection } from 'mongodb';
 import { LoginError, UserAlreadyExistError, UserNotFoundError } from '../error';
 import {
-    FileInfo,
-    Udict, Udoc,     User as _User } from '../interface';
+    FileInfo, Udict, Udoc,
+    User as _User,
+} from '../interface';
 import pwhash from '../lib/hash.hydro';
 import { Logger } from '../logger';
 import * as bus from '../service/bus';
@@ -338,13 +339,10 @@ class UserModel {
     }
 }
 
-function ensureIndexes() {
-    return Promise.all([
-        coll.createIndex('unameLower', { unique: true }),
-        coll.createIndex('mailLower', { sparse: true }),
-    ]);
-}
-
-bus.once('app/started', ensureIndexes);
+bus.once('app/started', () => db.ensureIndexes(
+    coll,
+    { key: { unameLower: 1 }, name: 'uname', unique: true },
+    { key: { mailLower: 1 }, name: 'mail', unique: true },
+));
 export default UserModel;
 global.Hydro.model.user = UserModel;
diff --git a/packages/hydrooj/src/service/db.ts b/packages/hydrooj/src/service/db.ts
index f0033dcde..27c85ee1c 100644
--- a/packages/hydrooj/src/service/db.ts
+++ b/packages/hydrooj/src/service/db.ts
@@ -49,15 +49,16 @@ class MongoService implements BaseService {
     }
 
     public async ensureIndexes<T>(coll: Collection<T>, ...args: IndexSpecification[]) {
+        if (process.env.NODE_APP_INSTANCE !== '0') return;
         const existed = await coll.listIndexes().toArray();
         for (const index of args) {
-            const i = existed.find(t => t.name == index.name);
+            const i = existed.find(t => t.name == index.name || JSON.stringify(t.key) == JSON.stringify(index.key));
             if (!i) {
                 logger.info('Indexing %s.%s with key %o', coll.collectionName, index.name, index.key);
                 await coll.createIndexes([index]);
-            } else if (i.v < 2 || JSON.stringify(i.key) !== JSON.stringify(index.key)) {
+            } else if (i.v < 2 || i.name !== index.name || JSON.stringify(i.key) !== JSON.stringify(index.key)) {
                 logger.info('Re-Index %s.%s with key %o', coll.collectionName, index.name, index.key);
-                await coll.dropIndex(index.name);
+                await coll.dropIndex(i.name);
                 await coll.createIndexes([index]);
             }
         }
diff --git a/packages/hydrooj/src/service/server.ts b/packages/hydrooj/src/service/server.ts
index 2fc4697ea..2925c34ea 100644
--- a/packages/hydrooj/src/service/server.ts
+++ b/packages/hydrooj/src/service/server.ts
@@ -13,18 +13,18 @@ import proxy from 'koa-proxies';
 import Router from 'koa-router';
 import cache from 'koa-static-cache';
 import {
-    cloneDeep,
-    Dictionary, filter,     isSafeInteger } from 'lodash';
+    cloneDeep, Dictionary, filter, isSafeInteger,
+} from 'lodash';
 import moment from 'moment-timezone';
 import { ObjectID } from 'mongodb';
 import sockjs from 'sockjs';
 import { parseMemoryMB } from '@hydrooj/utils/lib/utils';
 import {
-    BlacklistedError,     CsrfTokenError, HydroError, InvalidOperationError, MethodNotAllowedError,
-    NotFoundError, PermissionError,
-    PrivilegeError,
-    SystemError,
-    UserFacingError,     UserNotFoundError, ValidationError } from '../error';
+    BlacklistedError, CsrfTokenError, HydroError,
+    InvalidOperationError, MethodNotAllowedError, NotFoundError,
+    PermissionError, PrivilegeError, SystemError,
+    UserFacingError, UserNotFoundError, ValidationError,
+} from '../error';
 import { DomainDoc, User } from '../interface';
 import avatar from '../lib/avatar';
 import { isContent, isName, isTitle } from '../lib/validator';
@@ -890,7 +890,6 @@ export function start() {
     app.use(router.routes()).use(router.allowedMethods());
     server.listen(argv.options.port || port);
     logger.success('Server listening at: %d', argv.options.port || port);
-    if (process.send) process.send('ready'); // PM2 0-sec-down reload
     started = true;
 }
 
diff --git a/packages/hydrooj/src/service/storage.ts b/packages/hydrooj/src/service/storage.ts
index 739f8125b..fb8984679 100644
--- a/packages/hydrooj/src/service/storage.ts
+++ b/packages/hydrooj/src/service/storage.ts
@@ -15,6 +15,7 @@ interface StorageOptions {
     secretKey: string;
     bucket: string;
     region?: string;
+    pathStyle: boolean;
     endPointForUser?: string;
     endPointForJudge?: string;
 }
@@ -81,15 +82,20 @@ class StorageService {
 
     async start() {
         try {
-            const [endPoint, accessKey, secretKey, bucket, region, endPointForUser, endPointForJudge] = system.getMany([
+            const [
+                endPoint, accessKey, secretKey, bucket, region,
+                pathStyle, endPointForUser, endPointForJudge,
+            ] = system.getMany([
                 'file.endPoint', 'file.accessKey', 'file.secretKey', 'file.bucket', 'file.region',
-                'file.endPointForUser', 'file.endPointForJudge',
+                'file.pathStyle', 'file.endPointForUser', 'file.endPointForJudge',
             ]);
             this.opts = {
-                endPoint, accessKey, secretKey, bucket, region, endPointForUser, endPointForJudge,
+                endPoint, accessKey, secretKey, bucket, region,
+                pathStyle, endPointForUser, endPointForJudge,
             };
             this.client = new Client({
                 ...parseMainEndpointUrl(this.opts.endPoint),
+                pathStyle: this.opts.pathStyle,
                 accessKey: this.opts.accessKey,
                 secretKey: this.opts.secretKey,
             });