You may also need to do some capacity planning with them because the extraction needs of your DW could overly stress the legacy data source, thereby requiring upgrades.

您可能还需要和他们一起做一些功能计划，因为DW的抽取需求可能过度地对遗留数据源施压，因此需要升级。

youdao

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

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.

youdao

[model Discovery] consists in obtaining a model that represents a view on the legacy system (or at least parts of it) from its source code, raw data, available documentation, etc.

(模型发现)包括从遗留系统的源代码、原始数据、现有的文档等等中获取代表系统(或者至少是系统的一部分)视图的模型的过程。

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