由于引用名称局限于应用程序客户端、Web应用程序和单独的EJB，名称不再是全局的，因此高速缓存不太安全。
Because reference names are scoped to application clients, Web applications, and individual EJBs, the names are no longer global and are therefore not safe for caching.
这个文件中的第一组设置是全局性的高速缓存设置。
File. The first group of Settings in this file are the global cache Settings.
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