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redis memcache 性能比較_負載集群教程

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教程Tag：memcache Redis 性能添加

redis和memcache非常像的，都是key,value的方式，將數據存放內存中。最近在學習redis，在網上看了一些這方面的資料，有三種觀點：

1,redis讀寫內存比memcache快

2,memcache讀寫內存比redis快

3,memcache讀寫內存比redis快，但是redis整體性能優于memcache

所以我做了一下測試。關于redis和memcache的安裝，請參考linux redis 安裝配置, 以及redis php擴展

linux memcache 安裝

1，redis的測試文件

1.<?php
2.function get_data (){
3.   mysql_connect("localhost", "root", "") or die("Could not connect: " . mysql_error());
4.   mysql_select_db("ugc");
5.
6.   $result = mysql_query("SELECT task_id FROM ugc_tasks");
7.   $return = array();
8.   while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
9.      $return[] = $row;
10.   }
11.
12.   mysql_free_result($result);
13.   return $return;
14.}
15.
16.$redis = new redis();
17.$redis->connect('127.0.0.1', 6379);
18.
19.if ($redis->exists('test')) {
20.   $value = $redis->get("test");
21.}else{
22.   $value = get_data();
23.   $redis->set('test',json_encode($value));
24.}
25.
26.print_r(json_decode($value));
27.?>
<?php
function get_data (){
   mysql_connect("localhost", "root", "") or die("Could not connect: " . mysql_error());
   mysql_select_db("ugc");

   $result = mysql_query("SELECT task_id FROM ugc_tasks");
   $return = array();
   while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
      $return[] = $row;
   }

mysql_free_result($result);
return $return;
}

$redis = new redis();
$redis->connect('127.0.0.1', 6379);

if ($redis->exists('test')) {
   $value = $redis->get("test");
}else{
   $value = get_data();
   $redis->set('test',json_encode($value));
}

print_r(json_decode($value));
?>
2，redis的測試結果

第一次
root@ubuntu:/home/zhangying/download/webbench-1.5# webbench -c 10000 -t 30 http://localhost/php-redis/test_redis.php
Webbench - Simple Web Benchmark 1.5
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.

Benchmarking: GET http://localhost/php-redis/test_redis.php
10000 clients, running 30 sec.

Speed=48324 pages/min, 40318471 bytes/sec.
Requests: 22599 susceed, 1563 failed.

telnet 127.0.0.1 6379 telnet登錄一下，把test對應的值清除掉，保重測試的公平性
del test

第二次
root@ubuntu:/home/zhangying/download/webbench-1.5# webbench -c 10000 -t 30 http://localhost/php-redis/test_redis.php
Webbench - Simple Web Benchmark 1.5
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.

Benchmarking: GET http://localhost/php-redis/test_redis.php
10000 clients, running 30 sec.

Speed=53570 pages/min, 41217689 bytes/sec.
Requests: 23106 susceed, 3679 failed.

telnet 127.0.0.1 6379
del test

第三次
root@ubuntu:/home/zhangying/download/webbench-1.5# webbench -c 10000 -t 30 http://localhost/php-redis/test_redis.php
Webbench - Simple Web Benchmark 1.5
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.

Benchmarking: GET http://localhost/php-redis/test_redis.php
10000 clients, running 30 sec.

Speed=49450 pages/min, 39694073 bytes/sec.
Requests: 22301 susceed, 2424 failed.

telnet 127.0.0.1 6379
del test

3,memcache測試文件

1.<?php
2.function get_data (){
3.   mysql_connect("localhost", "root", "") or die("Could not connect: " . mysql_error());
4.   mysql_select_db("ugc");
5.
6.   $result = mysql_query("SELECT task_id FROM ugc_tasks");
7.   $return = array();
8.   while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
9.       $return[] = $row;
10.   }
11.
12.   mysql_free_result($result);
13.   return $return;
14.}
15.
16.$mem = new Memcache;
17.$mem->connect("127.0.0.1",11211) or die ("Could not connect");
18.$value = $mem->get('test1');
19.if (emptyempty($value)) {
20.   $value = json_encode(get_data());
21.   $mem->set('test1',$value,0, 600);
22.}
23.
24.print_r(json_decode($value));
25.?>
<?php
function get_data (){
   mysql_connect("localhost", "root", "") or die("Could not connect: " . mysql_error());
   mysql_select_db("ugc");

   $result = mysql_query("SELECT task_id FROM ugc_tasks");
   $return = array();
   while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) {
       $return[] = $row;
   }

mysql_free_result($result);
return $return;
}

$mem = new Memcache;
$mem->connect("127.0.0.1",11211) or die ("Could not connect");
$value = $mem->get('test1');
if (empty($value)) {
$value = json_encode(get_data());
$mem->set('test1',$value,0, 600);
}

print_r(json_decode($value));
?>
4，memcache測試結果

第一次

root@ubuntu:/home/zhangying/download/webbench-1.5# webbench -c 10000 -t 30 http://localhost/php-redis/test_memcache.php
Webbench - Simple Web Benchmark 1.5
Copyright (c) Radim Kolar 1997-2004, GPL Open Source Software.

Benchmarking: GET http://localhost/php-redis/test_memcache.php
10000 clients, running 30 sec.

Speed=61632 pages/min, 52228667 bytes/sec.
Requests: 29205 susceed, 1611 failed.

telnet 127.0.0.1 11211 telnet登錄一下，把test1對應的值清除掉，保重測試的公平性
delete test1

第二次

Benchmarking: GET http://localhost/php-redis/test_memcache.php
10000 clients, running 30 sec.

Speed=64160 pages/min, 52601449 bytes/sec.
Requests: 29426 susceed, 2654 failed.

telnet 127.0.0.1 11211
delete test1

第三次

Benchmarking: GET http://localhost/php-redis/test_memcache.php
10000 clients, running 30 sec.

Speed=65190 pages/min, 52506614 bytes/sec.
Requests: 29348 susceed, 3247 failed.

telnet 127.0.0.1 11211
delete test1

從上面比較結果，可以看出，memcache比redis快的。redis對key,value的管理，更靈活。有很多人把redis歸于nosql的范圍，細細想，還真是那么一回事。redis還可以把內在中的數據，放到磁盤中，這一點上，redis更像memcachedb。關于使用哪一種，看個人喜好而定了。

來源：網絡搜集/所屬分類：負載集群教程/更新時間：2011-12-08

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