Dropbox如何运作？ [英] How does Dropbox work?

问题描述

Dropbox 如何工作？仅仅是一个具有易于使用的Web界面并支持许多平台的FTP客户端吗？

How does Dropbox work? Is it just an FTP client with an easy-to-use web interface and support for many plarforms?

是什么使它对程序员如此有用，即使对于那些正在工作的人在基于Web的应用程序上，默认情况下谁可以通过FTP访问服务器？

What makes it so useful to programmers, even for those who are working on web-based applications and who have FTP access to a server by default?

Dropbox是否带有改进的算法来促进文件传输以提高速度？从程序员的角度来看，FTP客户端和Dropbox有什么区别？

Does Dropbox come with an improved algorithm to facilitate file transfer for a better speed? What is the difference between an FTP client and Dropbox from a programmer's point of view?

推荐答案

FTP只是复制文件的一种方式。复制与同步并不相同，我相信这是Dropbox的最大优势。

FTP is just a way of copying files. And copying is not the same as synchronizing, which I believe is Dropbox's biggest strength.

Dropbox是一种多路同步系统。这意味着，如果您在多台计算机上使用Dropbox帐户并在每台计算机上编辑不同的文件，则它们将全部同步。使用FTP，您将必须精心选择要从每个客户端删除或添加到服务器的文件。

Dropbox is a multiway synchronization system. This means if you are using your Dropbox account on many machines and editing different files on each machine, they will all be synchronised appropriately. With FTP you would have to delicately pick and choose which files need to be removed or added from each client to the server.

另一个主要区别是，每当文件更改，而FTP则没有。

Another main difference is that synchronisation happens automatically whenever a file changes, which FTP does not do.

在算法方面，我想Dropbox使用文件增量进行文件传输，这使其效率比FTP高得多。这意味着仅传输更改过的文件部分，而不是每次更改都传输整个文件（请参见 rsync ） 。

In terms of algorithms, I would guess that Dropbox uses file deltas for file transfer, which makes it much more efficient than FTP. This means only the parts of the file that changed are transferred instead of transferring the entire file every time it changes (see rsync).

我相信您只是在问Dropbox的核心功能。除此之外，Dropbox具有许多很酷的功能，FTP不喜欢某些版本控制，照片库共享等。

I believe you are only asking about Dropbox's core functionality. Beyond that, Dropbox has lots of cool features that FTP does not like some revision control, photo gallery sharing, etc.

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