memcached有很多版本的Client,具体可参照：

本次只讨论libmemcached这个client的安装及使用

官网：

 

libMemcached was designed to provide the greatest number of options to use Memcached. Some of the features provided:

 

1.  Asynchronous and Synchronous Transport Support.

2.  Consistent Hashing and Distribution.

3.  Tunable Hashing algorithm to match keys.

4.  Access to large object support.

5.  Local replication.

6.  A complete reference guide and documentation to the API.

7.  Tools to Manage your Memcached networks.

 

0.52版本：

http://launchpad.net/libmemcached/1.0/0.52/+download/libmemcached-0.52.tar.gz

1、安装

tar zxvf libmemcached-0.52.tar.gz

cd libmemcached-0.52

./configure

make

make install

2、测试

1 #include
     
        2 #include
      
         3 #include
       
          4  5 using namespace std;  6  7 int main(int argc, char* argv[])  8 {
    9     // connect server 10     memcached_st *memc; 11     memcached_return rc; 12     memcached_server_st* server; 13     time_t expiration = 0; 14     uint32_t flags; 15     16     memc = memcached_create(NULL); 17     server = memcached_server_list_append(NULL, "localhost", 11211, &rc); 18     rc = memcached_server_push(memc, server); 19     memcached_server_list_free(server); 20 21     server = memcached_server_list_append(NULL, "localhost", 11212, &rc); 22     rc = memcached_server_push(memc, server); 23     memcached_server_list_free(server); 24 25     memcached_behavior_set(memc, MEMCACHED_BEHAVIOR_BINARY_PROTOCOL, 0); 26 27     string key = "keyvalue"; 28     string value = "value"; 29     size_t value_length = value.length(); 30     size_t key_length = key.length(); 31     32     // save data 33     rc = memcached_set(memc, key.c_str(), key.length(), value.c_str(), value.length(), expiration, flags); 34     if(rc == MEMCACHED_SUCCESS) 35     {
   36         cout<<"Save data "<
        
         <<" successful!!"<
        
       
      
     

g++ -o testmemcached testmemcached.cpp -lmemcached

[ybt@mj247 memcached]$ ./testmemcached 

Save data value successful!!

Get Value value successful!!

Delete key:keyvalue successful!!

 

此时在server端上有输出：

[root@mj247 memcached]# <28 new auto-negotiating client connection

28: Client using the ascii protocol

<28 set keyvalue 0 0 5

>28 STORED

<28 get keyvalue 

>28 sending key keyvalue

>28 END

<28 delete keyvalue

>28 DELETED

<28 quit

<28 connection closed.

　　由于memcached支持分布式，所以在libmemcached上会根据key值做hash来得到需要存储在哪个server上。代码上memcached server分别11211及11212这两个端口来测试。

 2013-07-01更新

1.0.17版本安装

会报错：

error: tr1/cinttypes: No such file or directory

要求gcc版本比较高

# yum install gcc44 gcc44-c++ libstdc++44-devel# export CC=/usr/bin/gcc44# export CXX=/usr/bin/g++44

# ./configure --enable-tcmalloc