Hi Chris,

The feeds system does take into account the caching information
provided in the HTTP headers for your RSS/Atom feed. So if for example
there is a blog post which the headers say, for example, can be cached
for a couple of months, then they may not be updated before then, so
recent changes might not be picked up. Currently the server doesn't
pass along any cache-control headers which the client might send,
which means there isn't a mechanism for the client to invalidate the
cache. You may have to wait for the item to outlive the cache time
before it would be refetched. If you are concerned about edits not
showing up, perhaps you could set a shorter cache time on more
frequently updated items and use longer cache settings for posts which
are going to be updated less often.

Thank you,

Jeff

On Jan 4, 8:47 am, SV Billabong <[email protected]> wrote:
> Thanks Jeremy..
>
> Can someone from Google clarify? I can't base a project around "should
> (theoretically)"!!
>
> Also is there anyway to update the cache (for changed entries)? An
> automatic check would be great but a force update mode would work too.
>
> An example would be a wordpress blog with typically 10 entries in the
> feed. The user can change the feed length temporarily, would the new
> updated entries be re-cached or would the old content remain?
>
> Thanks
>
> Chris
>
> On Dec 28 2009, 9:34 am, Jeremy Geerdes <[email protected]> wrote:
>
>
>
> > The AJAX Feeds API depends on the same FeedFetcher bot which caches  
> > feeds for Google Reader. So if you load something in Reader, it should  
> > (theoretically) be cached in the Feeds API.
>
> > Jeremy R. Geerdes
> > Effective website design & development
> > Des Moines, IA
>
> > For more information or a project 
> > quote:http://jgeerdes.home.mchsi.comhttp://jgeerdes.blogspot.comhttp://jgee...
> > [email protected]
>
> > Unless otherwise noted, any price quotes contained within this  
> > communication are given in US dollars.
>
> > If you're in the Des Moines, IA, area, check out Debra Heights  
> > Wesleyan Church!
>
> > And check out my blog, Adventures in Web Development, 
> > athttp://jgeerdes.blogspot.com
> >   !
>
> > On Dec 28, 2009, at 8:32 AM, SV Billabong wrote:
>
> > > Does Google have a single feed database or is the AJAX feed controlled
> > > separately?
>
> > > I'm interested in historical entries and wondering if loading the feed
> > > in Google Reader also "stores" these historical entries for the AJAX
> > > feed extraction.
>
> > > Will the feed be constantly updated (daily?) or does a AJAX feed based
> > > utility need to be run in order to trigger a fetch in order to store
> > > entries?
>
> > > Thanks
>
> > > Chris
>
> > > On Dec 19, 9:52 am, SV Billabong <[email protected]> wrote:
> > >> Thanks Jeff..
>
> > >> Can you let us know here when it rolls out?
>
> > >> On Dec 18, 1:09 pm, "Jeff S (Google)" <[email protected]> wrote:
>
> > >>> Yes during debugging I was able to update the two feeds that were
> > >>> reported in this thread. A more permanent solution should be rolled
> > >>> out in our system shortly.
>
> > >>> Happy coding,
>
> > >>> Jeff
>
> > >>> On Dec 17, 5:23 pm, braiiins <[email protected]> wrote:
>
> > >>>> Not sure if you found the problem, but it's updated! Thanks!
>
> > >>>> On Dec 16, 12:18 pm, "Jeff S (Google)" <[email protected]> wrote:
>
> > >>>>> Yes this does seem like a bug and it is proving difficult to track
> > >>>>> down. We've been working on this and I'll keep this thread updated
> > >>>>> with progress. Apologies for the delay!
>
> > >>>>> Thank you,
>
> > >>>>> Jeff
>
> > >>>>> On Dec 14, 5:55 pm, braiiins <[email protected]> wrote:
>
> > >>>>>> Any thoughts on my problem? It'll be 3 weeks tomorrow and it  
> > >>>>>> still
> > >>>>>> won't update. I do have over 1000 feed readers, so it's not  
> > >>>>>> that it's
> > >>>>>> not viewed enough.
>
> > > --
>
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