被感染的计算机可能被利用，形成可以在外部操作的“僵尸网络”。不法分子就可以利用该网络发送垃圾信息，或发出大量假信息导致网站瘫痪。

Compromised machines can then be linked up to form "botnets3" under external control, which are used to send spam e-mails or disable websites with a flood of bogus requests.

youdao

在正在执行外部备份操作期间，如果主要服务器失效而日志被暂存在 RS 次要服务器上，会出现什么情况？

What happens when the primary server fails while logs are staged at RS secondary during external backup operation is in progress?

youdao

外部表上的操作载入日志，因此，外部表上也不能实现事务支持。

Operations on external tables are not logged. Thus transaction support is not enabled on external tables.

youdao