Giota Karadimitriou wrote:
> another idea would be that maybe I could send the item states 
> from the shared item state manager of one node to the shared item state
> managers of other nodes and validate their cache using the public
> available methods "stateCreated/stateDiscarded/stateModified".
>  
> The question is whether this would suffice (sharing and revalidating the
> state items among shareditemstatemanagers)or more things are needed to
> ensure integrity. 

as long as you can ensure that a cluster node does not store changes 
that conflict with another concurrently running store operation on 
another cluster node you should be fine. as I mentioned before I think 
you have to use some sort of distributed locking on the level of the 
different SharedISM in the cluster to ensure consistency. e.g. some sort 
of a distributed variant of the read-write lock in the SharedISM.

regards
  marcel