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

[seth vidal]

On Tue, 2006-08-22 at 13:50 -0400, Steve Magoun wrote:
> 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. 

ntp doesn't move the time more than a few seconds. rdate does - as does
ntpdate.

but ntp will bail if it has to move it more than a set amount.


-sv