session一致性memcached缓存数据库解决方案
1、安装memcached内存数据库
yum –y install memcached
可以用telnet localhost 11211
Set abc 0 0 5
12345
get abc
2、web服务器连接memcached的jar包拷贝到tomcat的lib
3、修改server.xml里面修改Engine标签，添加jvmRoute属性，目的是查看sessionid里面带有tomcat的名字，就是这里配置的jvmRoute
<Engine name="Catalina" defaultHost="localhost" jvmRoute="tomcat1">
4、配置tomcat的conf目录下的context.xml
<Manager className="de.javakaffee.web.msm.MemcachedBackupSessionManager"
memcachedNodes="n1:192.168.17.9:11211"
sticky="false"
lockingMode="auto"
sessionBackupAsync="false"
requestUriIgnorePattern=".*.(ico|png|gif|jpg|css|js)$"
sessionBackupTimeout="1000" transcoderFactoryClass="de.javakaffee.web.msm.serializer.kryo.KryoTranscoderFactory" />
配置memcachedNodes属性，配置memcached数据库的ip和端口，默认11211，多个的话用空格隔开
目的？让tomcat服务器从memcached缓存里面拿session或者是放session
5、修改index.jsp，取sessionid看一看
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<html lang="en">
SessionID:<%=session.getId()%>
</br>
SessionIP:<%=request.getServerName()%>
</br>
<h1>tomcat1</h1>
</html>
继续。!