Thanks for sharing the recording. Finally I've found out what's the purpose of total order protocol, although the drawbacks with WSC look pretty limiting. I'd really like to see the impact with WSC on, but that would require Infinispan itself as the main problem TOA is trying to solve is degraded performance due to deadlocking.

My main questions is about the ordering box size - if I understand that correctly, the ordering box consists of several physical machines.Then, what's the way to get the synchronized GSN from them? Is this the same as with regular TOA, taking the highest timestamp from all of the nodes? Or is there any internal synchronization within the ordering box?

Anyway, I like the idea of centralizing things, as the problem itself is centralized. And as my parallel systems teacher said, solving centralized problem in distributed fashion usually causes more trouble than it's worth.

Radim

On 11/15/2013 12:29 PM, Paul Robinson wrote:

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Radim Vansa <rvansa@redhat.com>
JBoss DataGrid QA