当然他也可以是其他的系统,(遗留系统,大型主机),可以是服务(B2B服务,信用卡局服务)或者是像LDAP这样的数据库等.

A data source can also be another system (legacy/mainframe), service (B2B service or credit card bureau), or some kind of repository (LDAP).

youdao

这意味着，如果监听器逻辑更改一个外部数据源(数据库、大型机等)中的任意状态，那么这些交互必须通过一个“至少一次”交付范式处理。

This means that if the listener logic changes any state in an external data source (database, mainframe, and so on) then these interactions must be treated with an "at least once" delivery paradigm.

youdao

最佳性能环境是能够同时在中间层 WebSphere Application Server 和后端（如数据库、大型机等）复制生产的环境。

The best performance environment is one that replicates production both in the middle tier WebSphere Application Server, and in the backend (such as databases, mainframes, and so on).

youdao