2014-05-01 02:13
原题：
Design question: Say you have hacked in to a network and can deploy your bot thousands of machines, how would you design your bot so that all the machines work together to download a website, say wikipedia. There should be load balancing and a page should be queryable given its URL.
题目：如果你已经黑了几千台电脑，如何设计机制来用这些肉鸡来协同下载一个完整的网站，比如Wikipedia？要求能够提供查询机制，确定特定的网址被下载到了哪台特定的机器。
解法：这是设计题，肯定没法写出代码了。我只能凭自己能想到的地方，写了几句分析。
代码：
// http://www.careercup.com/question?id=4922014007558144
Answer:
If you've got ahold of a bunch of bots, you may regard it as a heterogeneous group. Different OS, different configuration.
You may choose one or more bot machines as scheduling server, and the rest of them as working server.
The query URLs will be tranformed into digital sign, so as to decide which bot will perform what downloads.
In case that some of the machines lost contact or broke down, others will make up for the loss.