[Yum] Re: [PATCH] metadata cache expiration fix (seth vidal)

[Steve Magoun]

On Aug 20, 2006, at 12:00 PM, yum-request at lists.dulug.duke.edu wrote:

> I ended up doing something similar in cvs head.
>
> Specifically, I added a check. If the ctime of the cooking file was
> greater than the current time then assume the metadata needs updating.
>
> oh and ntp or rdate is your friend.


Thanks for the update on this. A minor nit: shouldn't you check  
ctime>=now rather than ctime>now? My assumption is the two values  
could only be the same if the clock had been set back at some point  
after the cookie was written.

As I understand it there are reasonably common situations in which  
NTP can cause the clock to change by a significant amount, so using  
NTP/rdate alone doesn't solve the problem. For example, dual-boot  
environments may need to leave the RTC in local time rather than UTC,  
which can cause trouble during seasonal time changes.


Thanks,
Steve