diff --git a/README-EN.md b/README-EN.md
index 26ea0ac1..faf6e649 100644
--- a/README-EN.md
+++ b/README-EN.md
@@ -28,7 +28,7 @@ Complete PT website building solution. Based on NexusPHP + Laravel + Filament.
 ## System Requirements
 - PHP: 8.0, must have extensions: bcmath, ctype, curl, fileinfo, json, mbstring, openssl, pdo_mysql, tokenizer, xml, mysqli, gd, redis, pcntl, sockets, posix
 - Mysql: 5.7 latest version or above
-- Redis：1.0.0 or above
+- Redis：2.0.0 or above
 
 ## Quick Start
 Install docker.  
diff --git a/README.md b/README.md
index 41ad6857..fa90400e 100644
--- a/README.md
+++ b/README.md
@@ -27,7 +27,7 @@
 ## 系统要求
 - PHP: 8.0，必须扩展：bcmath, ctype, curl, fileinfo, json, mbstring, openssl, pdo_mysql, tokenizer, xml, mysqli, gd, redis, pcntl, sockets, posix
 - Mysql: 5.7最新版或以上版本
-- Redis：1.0.0或以上版本
+- Redis：2.0.0或以上版本
 
 ## 快速开始
 安装 docker。  
diff --git a/app/Console/Commands/BackuAll.php b/app/Console/Commands/BackupAll.php
similarity index 97%
rename from app/Console/Commands/BackuAll.php
rename to app/Console/Commands/BackupAll.php
index bc2b5436..f268a4ce 100644
--- a/app/Console/Commands/BackuAll.php
+++ b/app/Console/Commands/BackupAll.php
@@ -5,7 +5,7 @@ namespace App\Console\Commands;
 use App\Repositories\ToolRepository;
 use Illuminate\Console\Command;
 
-class BackuAll extends Command
+class BackupAll extends Command
 {
     /**
      * The name and signature of the console command.
diff --git a/app/Console/Commands/NexusUpdate.php b/app/Console/Commands/NexusUpdate.php
index 1a6b44ac..ced9247d 100644
--- a/app/Console/Commands/NexusUpdate.php
+++ b/app/Console/Commands/NexusUpdate.php
@@ -91,6 +91,7 @@ class NexusUpdate extends Command
         $symbolicLinks = $settingTableRows['symbolic_links'];
         $fails = $settingTableRows['fails'];
         $mysqlInfo = $this->update->getMysqlVersionInfo();
+        $redisInfo = $this->update->getRedisVersionInfo();
 
         if (!empty($fails)) {
             foreach ($fails as $value) {
@@ -102,6 +103,10 @@ class NexusUpdate extends Command
             $this->doLog("Error: MySQL version: {$mysqlInfo['version']} is too low, please use the newest version of 5.7 or above.", 'error');
             return 0;
         }
+        if (!$redisInfo['match']) {
+            $this->doLog("Error: Redis version: {$mysqlInfo['version']} is too low, please use 2.0.0 or above.", 'error');
+            return 0;
+        }
         $this->doLog("going to createSymbolicLinks...");
         $this->update->createSymbolicLinks($symbolicLinks);
         $this->doLog("createSymbolicLinks done!");
diff --git a/app/Repositories/ExamRepository.php b/app/Repositories/ExamRepository.php
index e14d619a..1844be26 100644
--- a/app/Repositories/ExamRepository.php
+++ b/app/Repositories/ExamRepository.php
@@ -293,7 +293,7 @@ class ExamRepository extends BaseRepository
         $logPrefix = "uid: $uid, examId: $examId, begin: $begin, end: $end";
         $exam = Exam::query()->find($examId);
         $user = User::query()->findOrFail($uid);
-        if (Auth::user()->Class <= $user->class) {
+        if (Auth::user()->class <= $user->class) {
             throw new NexusException("No permission !");
         }
         if (!$this->isExamMatchUser($exam, $user)) {
diff --git a/app/Repositories/UserRepository.php b/app/Repositories/UserRepository.php
index 47973fa1..be1180ce 100644
--- a/app/Repositories/UserRepository.php
+++ b/app/Repositories/UserRepository.php
@@ -233,7 +233,7 @@ class UserRepository extends BaseRepository
         }
         $sourceField = $fieldMap[$field];
         $targetUser = User::query()->findOrFail($uid, User::$commonFields);
-        if (Auth::user()->Class <= $targetUser->class) {
+        if (Auth::user()->class <= $targetUser->class) {
             throw new NexusException("No permission !");
         }
         $old = $targetUser->{$sourceField};
diff --git a/nexus/Install/Install.php b/nexus/Install/Install.php
index 52759ace..df6cd8db 100644
--- a/nexus/Install/Install.php
+++ b/nexus/Install/Install.php
@@ -663,6 +663,16 @@ class Install
         return compact('version', 'match');
     }
 
+    public function getRedisVersionInfo(): array
+    {
+        global $Cache;
+        $redis = $Cache->getRedis();
+        $result = $redis->info();
+        $version = $result['redis_version'];
+        $match = version_compare($version, '2.0.0', '>=');
+        return compact('version', 'match');
+    }
+
     public function checkLock()
     {
         $fullFilename = ROOT_PATH . $this->lockFile;
diff --git a/nexus/Install/install/install.php b/nexus/Install/install/install.php
index 608d5a9d..30ace48a 100644
--- a/nexus/Install/install/install.php
+++ b/nexus/Install/install/install.php
@@ -104,6 +104,7 @@ if ($currentStep == 4) {
     $tableRows = $settingTableRows['table_rows'];
     $pass = $settingTableRows['pass'];
     $mysqlInfo = $install->getMysqlVersionInfo();
+    $redisInfo = $install->getREdisVersionInfo();
     while ($isPost) {
         set_time_limit(300);
         try {
@@ -136,7 +137,11 @@ if ($currentStep == 5) {
     ];
 }
 
-if (!empty($error) || (isset($mysqlInfo) && !$mysqlInfo['match'])) {
+if (
+    !empty($error)
+    || (isset($mysqlInfo) && !$mysqlInfo['match'])
+    || (isset($redisInfo) && !$redisInfo['match'])
+) {
     $pass = false;
 }
 ?>
@@ -184,6 +189,9 @@ if (!empty($error) || (isset($mysqlInfo) && !$mysqlInfo['match'])) {
                     if (!$mysqlInfo['match']) {
                         echo sprintf('<div class="text-red-700 pt-10">MySQL version: %s is too low, please use the newest version of 5.7 or above.</div>', $mysqlInfo['version']);
                     }
+                    if (!$redisInfo['match']) {
+                        echo sprintf('<div class="text-red-700 pt-10">Redis version: %s is too low, please use 2.0.0 or above.</div>', $redisInfo['version']);
+                    }
                 } elseif ($currentStep == 5) {
                     echo $install->renderForm($userFormControls, '1/2', '1/4', '3/4');
                 } elseif ($currentStep > $maxStep) {
diff --git a/nexus/Install/update/update.php b/nexus/Install/update/update.php
index c249d1d2..d320da87 100644
--- a/nexus/Install/update/update.php
+++ b/nexus/Install/update/update.php
@@ -157,6 +157,7 @@ if ($currentStep == 4) {
     $tableRows = $settingTableRows['table_rows'];
     $pass = $settingTableRows['pass'];
     $mysqlInfo = $update->getMysqlVersionInfo();
+    $redisInfo = $update->getREdisVersionInfo();
     while ($isPost) {
         set_time_limit(300);
         try {
@@ -175,7 +176,11 @@ if ($currentStep == 4) {
     }
 }
 
-if (!empty($error) || (isset($mysqlInfo) && !$mysqlInfo['match'])) {
+if (
+    !empty($error)
+    || (isset($mysqlInfo) && !$mysqlInfo['match'])
+    || (isset($redisInfo) && !$redisInfo['match'])
+) {
     $pass = false;
 }
 ?>
@@ -224,6 +229,9 @@ if (!empty($error) || (isset($mysqlInfo) && !$mysqlInfo['match'])) {
                 if (!$mysqlInfo['match']) {
                     echo sprintf('<div class="text-red-700 pt-10">MySQL version: %s is too low, please use the newest version of 5.7 or above.</div>', $mysqlInfo['version']);
                 }
+                if (!$redisInfo['match']) {
+                    echo sprintf('<div class="text-red-700 pt-10">Redis version: %s is too low, please use 2.0.0 or above.</div>', $redisInfo['version']);
+                }
             } elseif ($currentStep > $maxStep) {
                 echo '<div class="text-green-900 text-6xl p-10">Congratulations, everything is ready!</div>';
                 echo '<div class="mb-6">For questions, consult the upgrade log at: <code>' . $update->getLogFile() . '</code></div>';
diff --git a/public/torrentrss.php b/public/torrentrss.php
index cd549b8a..c8e3482d 100644
--- a/public/torrentrss.php
+++ b/public/torrentrss.php
@@ -1,5 +1,17 @@
 <?php
 require "../include/bittorrent.php";
+$cacheKey = 'nexus_rss';
+$hashKey = md5(http_build_query($_GET));
+$redis = $Cache->getRedis();
+$cacheData = $redis->hGet($cacheKey, $hashKey);
+if ($cacheData) {
+    $cacheData = unserialize($cacheData);
+    if (isset($cacheData['deadline']) && $cacheData['deadline'] > time()) {
+        do_log("rss get from cache");
+        header ("Content-type: text/xml");
+        die($cacheData['data']);
+    }
+}
 dbconn();
 function hex_esc($matches) {
 	return sprintf("%02x", ord($matches[0]));
@@ -117,15 +129,12 @@ $url = get_protocol_prefix().$BASEURL;
 $year = substr($datefounded, 0, 4);
 $yearfounded = ($year ? $year : 2007);
 $copyright = "Copyright (c) ".$SITENAME." ".(date("Y") != $yearfounded ? $yearfounded."-" : "").date("Y").", all rights reserved";
-header ("Content-type: text/xml");
-print("<?xml version=\"1.0\" encoding=\"utf-8\"?>");
+$xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>";
 //The commented version passed feed validator at http://www.feedvalidator.org
 /*print('
 <rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom">');*/
-print('
-<rss version="2.0">');
-print('
-	<channel>
+$xml .= '<rss version="2.0">';
+$xml .= '<channel>
 		<title>' . addslashes($SITENAME.' Torrents'). '</title>
 		<link><![CDATA[' . $url . ']]></link>
 		<description><![CDATA[' . addslashes('Latest torrents from '.$SITENAME.' - '.htmlspecialchars($SLOGAN)) . ']]></description>
@@ -144,11 +153,11 @@ print('
 			<width>100</width>
 			<height>100</height>
 			<description>' . addslashes($SITENAME.' Torrents') . '</description>
-		</image>');
+		</image>';
 /*print('
 		<atom:link href="'.$url.$_SERVER['REQUEST_URI'].'" rel="self" type="application/rss+xml" />');*/
-print('
-');
+//print('
+//');
 foreach ($list as $row)
 {
 	$title = "";
@@ -165,22 +174,25 @@ foreach ($list as $row)
 	if (!empty($_GET['isize'])) $title .= "[".mksize($row['size'])."]";
 	if (!empty($_GET['iuplder'])) $title .= "[".$author."]";
 	$content = format_comment($row['descr'], true, false, false, false);
-	print('		<item>
+	$xml .= '<item>
 			<title><![CDATA['.$title.']]></title>
 			<link>'.$itemurl.'</link>
 			<description><![CDATA['.$content.']]></description>
-');
+';
 //print('			<dc:creator>'.$author.'</dc:creator>');
-print('			<author>'.$author.'@'.$_SERVER['HTTP_HOST'].' ('.$author.')</author>');
-print('
-			<category domain="'.$url.'/torrents.php?cat='.$row['cat_id'].'">'.$row['cat_name'].'</category>
+$xml .= '<author>'.$author.'@'.$_SERVER['HTTP_HOST'].' ('.$author.')</author>';
+$xml .= '<category domain="'.$url.'/torrents.php?cat='.$row['cat_id'].'">'.$row['cat_name'].'</category>
 			<comments><![CDATA['.$url.'/details.php?id='.$row['id'].'&cmtpage=0#startcomments]]></comments>
 			<enclosure url="'.$itemdlurl.'" length="'.$row['size'].'" type="application/x-bittorrent" />
 			<guid isPermaLink="false">'.preg_replace_callback('/./s', 'hex_esc', hash_pad($row['info_hash'])).'</guid>
 			<pubDate>'.date('r',strtotime($row['added'])).'</pubDate>
 		</item>
-');
+';
 }
-print('	</channel>
-</rss>');
+$xml .= '</channel>
+</rss>';
+do_log("rss cache generated");
+$redis->hSet($cacheKey, $hashKey, serialize(['data' => $xml, 'deadline' => time() + 300]));
+header ("Content-type: text/xml");
+echo $xml;
 ?>