Most custom sweepers observe some model object, and based on changes, fire logic to expire one or more cache pages.
多数定制清理器都会观察某些模型对象,并根据更改击发逻辑来使一个或多个缓存页面到期失效。
2
The 30 day cache solves the user-error problem and the fact that data is stored on the Internet solves the fire/flood/theft issue (where USB or network drives may also be affected).