[Zope-dev] Storing changes in ZODB, without keeping old versions

The ZCache Product I created has one major problem - every time it updates itself it'll make the ZODB grow, since it stores all the old contents it had. I don't want this to happen - there's no reason why anyone should undo a change to the cache. I do however want the contents of the ZCache to be stored on disk when it gets moved out of the Zope cache, so I don't want to use volatile variables. Is there any way to do this? Or is it impossible? -- Itamar S.T. itamars@ibm.net