python question: sync big object tree between processes?

[fpemud]

I want to sync a big object tree between two processes, the sync is one way, from proc A to proc B.
Changes to the object tree are small, frequent and in transaction.

How do I do this effectively?
In fact proc A is using zodb for object tree management and persistent.

The simplest solution comes into my head currently is to transfer delta of object tree.
Is there any lib to do that?

The two processes can be on same PC or different PC connected by network.
I want it be more effecient when on same machine.
So I must use socket in the different PC case, and switch to use shared memory in the same PC case?

[vaxbrat]

You might want to look into a publish/subscribe message passing model with something like http://www.zeromq.org/ for the transport. Use this to notify object transactions from A to B.

[dol-sen]

There is also dev-python/pydispatcher for passing info around.
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