1.准备jar包，是最麻烦的一步，我选择kryo的序列化方案，javolution序列化死活弄不通，总是报错.google上又说是bug，不支持，启动就是报错
-rw-r--r-- 1 tomcat tomcat 3085 3月 25 2014 minlog-1.2.jar
-rw-r--r-- 1 tomcat tomcat 147019 3月 9 2015 memcached-session-manager-1.8.2.jar
-rw-r--r-- 1 tomcat tomcat 29329 3月 9 2015 msm-kryo-serializer-1.8.2.jar
-rw-r--r-- 1 tomcat tomcat 62112 3月 9 2015 kryo-serializers-0.11.jar
-rw-r--r-- 1 tomcat tomcat 43398 3月 9 2015 asm-3.2.jar
-rw-r--r-- 1 tomcat tomcat 94830 3月 9 2015 kryo-1.04.jar
-rw-r--r-- 1 tomcat tomcat 11615 3月 9 2015 reflectasm-1.01.jar
-rw-r--r-- 1 tomcat tomcat 459447 3月 9 2015 spymemcached-2.11.1.jar
-rw-r--r-- 1 tomcat tomcat 10407 6月 6 19:41 memcached-session-manager-tc8-1.8.2.jar
2.弄两个tomcat实例,server.xml配置
<Host name="localhost" appBase="webapps" unpackWARs="false" autoDeploy="false">
<Context path="" docBase="/opt/apps/8181/" reloadable="false" />
cat /opt/apps/8181/index.jsp
<%@ page language="java" %>
<html>
<head><title>TomcatA</title></head>
<body>
<h1><font color="red">TomcatA.magedu.com</font></h1>
<table align="centre" border="1">
<tr>
<td>Session ID</td>
<% session.setAttribute("magedu.com","magedu.com"); %>
<td><%= session.getId() %></td>
</tr>
<tr>
<td>Created on</td>
<td><%= session.getCreationTime() %></td>
</tr>
</table>
</body>
</html>
另外一个8282就行
3.编译memcached
libevent-2.0.22-stable memcached-1.4.24
vim /etc/init.d/memcached 从别人博客找到的
#!/bin/bash
#
# Init file for memcached
#
# chkconfig: - 86 14
# description: Distributed memory caching daemon
#
# processname: memcached
# config: /etc/sysconfig/memcached
. /etc/rc.d/init.d/functions
## Default variables
PORT="11211"
USER="nobody"
MAXCONN="1024"
CACHESIZE="256"
RETVAL=0
prog="/usr/local/memcached/bin/memcached"
desc="Distributed memory caching"
lockfile="/var/lock/subsys/memcached"
start() {
echo -n $"Starting $desc (memcached): "
daemon $prog -d -p $PORT -u $USER -c $MAXCONN -m $CACHESIZE
RETVAL=$?
[ $RETVAL -eq 0 ] && success && touch $lockfile || failure
echo
return $RETVAL
}
stop() {
echo -n $"Shutting down $desc (memcached): "
killproc $prog
RETVAL=$?
[ $RETVAL -eq 0 ] && success && rm -f $lockfile || failure
echo
return $RETVAL
}
restart() {
stop
start
}
reload() {
echo -n $"Reloading $desc ($prog): "
killproc $prog -HUP
RETVAL=$?
[ $RETVAL -eq 0 ] && success || failure
echo
return $RETVAL
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
restart
;;
condrestart)
[ -e $lockfile ] && restart
RETVAL=$?
;;
reload)
reload
;;
status)
status $prog
RETVAL=$?
;;
*)
echo $"Usage: $0 {start|stop|restart|condrestart|status}"
RETVAL=1
esac
exit $RETVAL
########################
chkconfig --add memcached
chkconfig memcached on
service memcached start
cp -r /etc/init.d/memcached /etc/init.d/memcached2
改端口，再起一个
4.context配置
tomcat a的配置
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:172.1.1.212:11211,n2:172.1.1.212:11212"
failoverNodes="n2"
requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
transcoderFactoryClass="de.javakaffee.web.msm.JavaSerializationTranscoderFactory"
/>
tomcat b的配置
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:172.1.1.212:11211,n2:172.1.1.212:11212"
failoverNodes="n1"
requestUriIgnorePattern=".*\.(ico|png|gif|jpg|css|js)$"
transcoderFactoryClass="de.javakaffee.web.msm.JavaSerializationTranscoderFactory"
/>
5.启动报这个信息就是正确的
信息: --------
- finished initialization:
- sticky: true
- operation timeout: 1000
- node ids: [n1]
- failover node ids: [n2]
- storage key prefix: null
--------
6.前段用nginx还是apache，自己喜欢那个用那个
7.测试，http://ip,你会看到 session id是不变的。本文出自 “人，要有自己的想法” 博客，请务必保留此出处http://szgb2014.blog.51cto.com/340201/1786746
原文地址：http://szgb2014.blog.51cto.com/340201/1786746
