mamcached+magent構建memcached集羣

cat /etc/redhat-release
CentOS release 6.7 (Final)

防火牆、selinux 關閉

192.168.12.30 安裝libevent和memcached、magent
192.168.12.43 安裝libevent和memcached、magent
192.168.12.42 安裝libevent和memcached
軟件下載地址：
https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/memagent/magent-0.5.tar.gz
https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/memcached/memcached-1.4.15.tar.gz
安裝：
yum -y install gcc libevent-devel

tar zxvf libevent-2.0.21-stable.tar.gz
cd libevent-2.0.21-stable
./configure --prefix=/usr/local/libevent
make
make install
ln -s /usr/lib64/libm.so /usr/local/lib64/libm.a

memcached安裝:
tar zxvf memcached-1.4.15.tar.gz
cd memcached-1.4.15
./configure --prefix=/usr/local/memcached --with-libevent=/usr/local/libevent
make&&make install
cp /usr/local/memcached/bin/memcached /etc/rc.d/init.d/
/etc/init.d/memcached -d -m 512 -u root -l 192.168.12.30 -p 11211 -c 10000 -M -f 1.1 -P /tmp/memcached.pid

ps aux|grep memcached
root     15059  0.0  0.0 331032  1072 ?        Ssl  16:37   0:00 //etc/init.d/memcached -d -m 512 -u root -l 192.168.12.30 -p 11211 -c 10000 -M -f 1.1 -P /tmp/memcached.pid
root     15068  0.0  0.0 103320   832 pts/1    R+   16:37   0:00 grep memcached

-p <num>      設置端口號(默認不設置爲: 11211)
-U <num>      UDP監聽端口 (默認: 11211, 0 時關閉)  
-l <ip_addr>  綁定地址 (默認:全部都容許,不管內外網或者本機更換IP，有安全隱患，若設置爲127.0.0.1就只能本機訪問)
-d            duli進程運行
-u <username> 綁定使用指定用於運行進程 <username>
-m <num>      容許最大內存用量，單位M (默認: 64 MB)
-P <file>     將PID寫入文件<file>，這樣可使得後邊進行快速進程終止, 須要與 -d 一塊兒使用

magent安裝：
mkdir magent
cd magent
tar zxvf magent-0.5.tar.gz

vi ketama.h   (開頭加入)
#ifndef SSIZE_MAX
# define SSIZE_MAX      32767
#endif

/sbin/ldconfig
sed -i "s#LIBS = -levent#LIBS = -levent -lm#g" Makefile
make
cp magent /etc/rc.d/init.d/
/etc/init.d/magent -u root -n 51200 -l192.168.12.30 -p 12000 -s 192.168.12.30:11211
ps -ef | grep magent
root     15070     1  0 16:47 ?        00:00:00 /etc/init.d/magent -u root -n 51200 -l192.168.12.30 -p 12000 -s 192.168.12.30:11211
root     15073  7508  0 16:47 pts/0    00:00:00 grep magent

-h this message
  -u uid
  -g gid
  -p port, default is 11211. (0 to disable tcp support)
  -s ip:port, set memcached server ip and port
  -b ip:port, set backup memcached server ip and port
  -l ip, local bind ip address, default is 0.0.0.0
  -n number, set max connections, default is 4096
  -D do not go to background
  -k use ketama key allocation algorithm
  -f file, unix socket path to listen on. default is off
  -i number, max keep alive connections for one memcached server, default is 20
  -v verbose
啓動magent實例

/etc/init.d/magent -u root -n 4096 -l 192.168.12.30 -p 11200 -s 192.168.12.30:11211 -s 192.168.12.43:11211 -b 192.168.12.42:11211

/etc/init.d/magent -u root -n 4096 -l 192.168.12.43 -p 11200 -s 192.168.12.30:11211 -s 192.168.12.43:11211 -b 192.168.12.42:11211