How to check that data was propagated to all nodes in cluster?

Hi.
We are using Weblogic 10.3.5 and Coherence 3.6. Both applications work in cluster mode and we are using replicated mode as a Coherence topology. Also the NameCache use to store and retreive data from Coherence cluster. Now I have a task to calculate a time that take data propagation to all nodes. So, from my sight of view coherence should raise some kind of event when each node in cluster will fulfield with the same data. Or may be there is a standard coherence(weblogic?) listener that provide such an information.
I will be appreciate for help how to solve my task.

Jonathan.Knight wrote:
Hi,
If you are using a replicated cache then the time taken to replicate the data is the time taken to do a put. Coherence will not return from a put method call on a NamedCache until the data has reached all the nodes. That is why replicated caches are a bad idea for clusters with a lot of nodes where there are frequent updates as they are slow.
JKHi JK,
actually, AFAIK, it is not 100% correct.
From what I remember from an earlier discussion or email, replication in a replicated cache is synchronous to one other member (the lease owner), and asynchronous thereafter. The synchronous part of the protocol involves the mutating member and the entry lease owner (which may be the same). As I understand the lease owner orders the operations and resolves races between multiple mutators, and drives the asynchronous part of the replication to all other members.
In short, total network cost is linear with nodes, but latency wise you do not need to wait until all updates actually took place on all other nodes (that would be a really sad scenario when some nodes are communicating slowly).
Best regards,
Robert

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