尽管Hadoop是一些大型搜索引擎数据缩减功能的核心部分，但是它实际上是一个分布式数据处理框架。

Although Hadoop is the core of data reduction for some of the largest search engines, it's better described as a framework for the distributed processing of data.

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在理想情况下，应该根本不修改属于核心功能的代码，因为在这部分代码的测试和稳定性处理方面已经投入了大量时间。

Ideally, code pertaining to core functions should not change at all because of the time already invested in testing and stabilizing that portion of code.

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这个概念很简单，为什么一个编写得很好、只需要一部分处理器能力的站点需要为整个处理器核心支付费用呢？

The concept is simple, why pay for an entire processor core when a well written website only needs a fraction of that power.

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