多层vs散布? [英] Multi-tier vs Distibuted?

问题描述

多层和/或分发的应用程序，它们具有相同的含义吗?

Multi-tier and/or ditstributed apps, do they have the same meaning ?

当我们谈论这些应用程序中的层时，是物理层(数据库，浏览器，Web服务器等)还是逻辑层(数据访问层，业务层等)?

When we talk about layers in these apps, is it physical layers (database, browser, web server,...) or logical layers (data access layer, business layer,...) ?

推荐答案

也许这两个句子确实直观地传达了分布式和多层的区别:

Maybe these two sentences do convey intuitively the distinction between distributed and multi-tier:

• 分布式:您在节点之间复制处理
• 多层:您将处理划分为各层

• Distributed: You replicate the processing amongst nodes
• Multi-tier: You split the processing amongst tiers

在一种情况下，将相同的处理复制到多个节点上.在另一种情况下，每个层都有各自的职责，并且在每个层上运行的处理是不同的.

In one case, the same processing is replicated over several nodes. In the other case, each tier has a distinct responsibility and the processing running on each tier differ.

这两种概念都不是排他的:您可以拥有非分布式的多层应用程序(如果没有冗余/复制形式)，非多层的分布式应用程序，也可以具有分布式的多层应用程序(如果它们具有某种形式的冗余).

Both notions are not exclusive: you can have non-distributed multi-tier apps (if there is no form of redundancy/replication), distributed apps which are not multi-tier, but also multi-tier apps which are distributed (if they have some form of redundancy).

关于区别还有很多要说的，但是(对我而言)区别本质上就存在.

There would be a lot more to say about the distinction, but the difference (to me) is essentially there.

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