Re: [infinispan-dev] Total Order non-transactional cache

Hello Pedro, I read your design page with interest, and formulated a few remarks/questions below. Despite I do not know in details the internals, I Hope that they might be useful. Cheers, Pierre - It is unclear to me how the protocol execute reads, in particular regarding causality. If a reader waits for a single replica to answer, in case every write requires all replicas to answer, this is fine. However, it seems that a writer can return as soon as a single replica returns an acknowledgement. In such a case, it might be the case that a reader do not see its own modifications, if it retrieves data from a replica that did not apply the modifications yet. - Do you ensure impotency of commands inside ISPN ? In my understanding, it is necessary when switching from a view v1 to a view v2, as commands delivered at the end of v1 might be already executed. - I would call your replication protocol "virtual synchrony based" instead, as it is relying on the virtual synchrony abstraction provided by JGroups. On 10. 11. 14 15:49, Pedro Ruivo wrote: