Session migration

定義（來源：http://www.roseindia.net/interviewquestions/servlet/session-tracking.shtml）：
Session Migration is a mechanism of moving the session from one server to another in case of server failure. Session Migration can be implemented by:
a) Persisting the session into database
b) Storing the session in-memory on multiple servers.

關鍵字：Session migration、Session replication、Cluster
相關資源：
1、Cluster：Tomcat 叢集設置
2、用terracotta達成tomcat session
3、How to integrate two web applications having two different context paths

後來發現我需要的不是 Session migration，而是 Session Persistent，所以這篇的資料整理就先停在這了。