[Tickets #11590] Re: Kolab backend: IMAP cache does not get updated

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Ticket URL: http://bugs.horde.org/ticket/11590
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  Ticket             | 11590
  Updated By         | Thomas Jarosch <thomas.jarosch at intra2net.com>
  Summary            | Kolab backend: IMAP cache does not get updated
  Queue              | Horde Framework Packages
  Version            | Git master
  Type               | Bug
  State              | Assigned
  Priority           | 3. High
  Milestone          |
  Patch              |
  Owners             | Gunnar Wrobel
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Thomas Jarosch <thomas.jarosch at intra2net.com> (2012-11-05 15:57) wrote:

> This is currently the expected behavior as the implemented  
> synchronization strategy is pretty dumb. The old code had no  
> synchronization strategy and so it always synchronized the data on  
> access. You should be able to go back to the old behavior by  
> modifying Horde/Kolab/Storage/Synchronization.php. Add a "if (false  
> && ..." to both conditionals present in that file. Does that revert  
> back to the expected behavior?

Ok, I understand why the old behavior is inappropriate for many  
folders "subscribed" at the same time. The new strategy is quite a  
change to H4, we probably should have mentioned it in the changelog.

> I lack a final plan concerning the synchronization strategy

For plain dumb IMAP, what about syncing the folders every XX minutes  
(+ random threshold to distribute the server load a bit better)? Also  
on login and folder "subscribe".
The sync time should be user configurable, may be 5 minutes as default.

> What describe - concurrent access with two clients to the same  
> folder - is not the default case after all. At least not for  
> personal folders.

For the "groupware" case it's the default. For example a secretary  
managing appointments for another person.