We are soon to implement clustering in our application.

We are using OJB standalone, i.e. without any other third-party middleware.

We need to know if OJB will support clustering with a low-cost migration from
where we are now: ODMG with pessimistic locking.

Optimistic locking and a standard api are requirements.

If we can't get to clustering from where we are now easily then we will probably
port to another o-to-r tool.

Can you please provide us with a migration path?  We can wait for two months,
three months max.

In OJB will ODMG ever support optimistic locking?

Is JDO an option? 

Is there a viable caching solution?


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