在MAC OSX下搭建 memcached 环境，那是轻松的一塌糊涂啊。整个过程几分钟就搞定了，让我再次感叹，MacBook 就是为 *nux 下程序员量身定制的！
我是使用 brew 来安装的，让我们再回顾一下整个过程吧。如果你没有装 brew ,先看步骤一，否则直接看步骤二。
步骤一：安装 Homebrew
先看看是否满足下面条件：
Intel 的 CPU
OS X 10.5 或者更高
安装了XCode 或者 XCode命令行工具
满足了，就可以安装 Homebrew，命令如下：
$ ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go)"
打开Terminal, 粘贴上面的语句.该脚本首先将会解释它要做什么, 然后暂停下来, 直到您确认继续. 更多的安装选项在这里可以看到 .
步骤二：安装 memcached
安装前，可以先查找一下，看看有没有：
$ brew search memcache
返回结果:
libmemcached memcache-top memcached memcacheq
说明和关键字memcache相关的有上面这四个，这样就确认了，有我们需要的东西，第一个是客户端，第三个是服务器。
那么安装吧！
先装服务器：
$ brew install memcached
安装日志：
==> Installing memcached dependency: libevent
==> Downloading https://github.com/downloads/libevent/libevent/libevent-2.0.21-s
######################################################################## 100.0%
==> ./configure --disable-debug-mode --prefix=/usr/local/Cellar/libevent/2.0.21
==> make
==> make install
🍺 /usr/local/Cellar/libevent/2.0.21: 48 files, 1.8M, built in 84 seconds
==> Installing memcached
==> Downloading http://memcached.googlecode.com/files/memcached-1.4.15.tar.gz
######################################################################## 100.0%
==> ./configure --prefix=/usr/local/Cellar/memcached/1.4.15 --disable-coverage
==> make install
==> Caveats
To have launchd start memcached at login:
ln -sfv /usr/local/opt/memcached/*.plist ~/Library/LaunchAgents
Then to load memcached now:
launchctl load ~/Library/LaunchAgents/homebrew.mxcl.memcached.plist
Or, if you don't want/need launchctl, you can just run:
/usr/local/opt/memcached/bin/memcached
==> Summary
🍺 /usr/local/Cellar/memcached/1.4.15: 10 files, 176K, built in 8 seconds
从上面安装日志，可以看出:
- 安装 memcached 前，先安装了其所依赖的 libevent 库
- 下载的libevent和memcached，被安装到/usr/local/Cellar下面，但是又自动在/usr/local/bin下面建立了软连接，方便使用。
安装后可以查看安装的结果：
$ which memcached
/usr/local/bin/memcached
$ memcached -h
memcached 1.4.15
...
步骤二：安装 libmemcached
继续安装客户端库：
$ brew install libmemcached
==> Downloading https://launchpad.net/libmemcached/1.0/1.0.16/+download/libmemca
######################################################################## 100.0%
==> ./configure --prefix=/usr/local/Cellar/libmemcached/1.0.16
==> make install
🍺 /usr/local/Cellar/libmemcached/1.0.16: 110 files, 1.4M, built in 108 seconds
步骤三：启动服务器
先默认参数启动吧：
$ /usr/local/bin/memcached -d
步骤四：编写客户端测试程序并运行
编写程序文件 example.cpp :
#include <libmemcached/memcached.h>
#include <string.h>
#include <stdio.h>
#include <sys/time.h>
#define TEST_NUM 500000
void printNowTime() {
struct timeval current;
gettimeofday(& current, NULL);
struct tm * mtm = localtime(& current.tv_sec);
printf("[%04d-%02d-%02d %02d:%02d:%02d.%03d] ", mtm->tm_year+1900, mtm->tm_mon + 1, mtm->tm_mday, mtm->tm_hour, mtm->tm_min, mtm->tm_sec, current.tv_usec / 1000);
}
int main() {
const char *config_string = "--SERVER=localhost";
memcached_st *memc= memcached(config_string, strlen(config_string));
//const char *keys[]= {"key1", "key2", "key3","key4"};
const size_t key_length[]= {4, 4, 4, 4};
const char *values[] = {"This is 1 first value", "This is 2 second value", "This is 3 third value","this is 4 forth value"};
size_t val_length[]= {21, 22, 21, 21};
char keys[TEST_NUM][10];
printNowTime();
printf("start init keys.\n");
for(int i=0; i<TEST_NUM; ++i) {
sprintf(keys[i], "key%06d", i);
}
printNowTime();
printf("end init keys.\n\n");
memcached_return_t rc;
printNowTime();
printf("start set value.\n");
for (int i=0; i < TEST_NUM; i++)
{
rc = memcached_set(memc, keys[i], 9, values[i%4], val_length[i%4], (time_t)180,(uint32_t)0);
//printf("key: %s rc:%s\n", keys[i], memcached_strerror(memc, rc)); // 输出状态
}
printNowTime();
printf("end set value.\n\n");
char * result;
uint32_t flags;
size_t value_length;
printNowTime();
printf("start read value.\n");
for(int i=0; i < TEST_NUM; i++)
{
result = memcached_get(memc, keys[i], 9, &value_length, &flags, &rc);
//if (i%10000 == 0)
// printf("key: %s, value: %s.\n", keys[i], result);
}
printNowTime();
printf("end read value.\n");
memcached_free(memc);
return 0;
}
编写 Makefile 文件:
example: example.cpp
gcc -o example example.cpp -lmemcached
clean:
rm example
编译：
$ make
运行测试:
$ ./example
[2013-05-01 20:20:39.500] start init keys.
[2013-05-01 20:20:39.593] end init keys.
[2013-05-01 20:20:39.593] start set value.
[2013-05-01 20:21:04.527] end set value.
[2013-05-01 20:21:04.527] start read value.
[2013-05-01 20:21:26.959] end read value.
整个过程结束！
确实很简单吧！