[CalendarServer-dev] Invalidated resources with memcache implementation

[Wilfredo Sánchez Vega]

   The caches should time out such that eventually the new email  
address is recognized, but there will be some time when the server has  
stale data.

   There is no way to get notified by OD that a record changed, so the  
only other option is not to cache the data.

   If an hour later (I think the cache timeout is 30 minute), you  
still can't use that email address, we probably have a bug.

	-wsv


On May 6, 2009, at 12:48 PM, Eli Bach wrote:

> When using open directory configure users/groups/locations/ 
> resources, with the new memcached caching implementation, what is  
> the best way to handle the situation where
>
> -a user tries to invite a specific user email address in iCal, but  
> the user isn't present is OD
> -so DCS adds that email address to the cache as being invalid
> -the user adds the user to OD
> -the user goes back to iCal to re-invite the user
>
> At this point, DCS seems to only use the cache entry, which still  
> indicates the address is invalid.
>
> What should be done at this point?
>
> I've got a separate process that helps manage changes to the server,  
> so I could send a signal to DCS or possibly to the memcached  
> process, but what is the best way to handle this?  Of course, the  
> trivial, but extremely heavyweight option is to restart DCS.