BTW, there is no permission on cross-client update order. Best, tison.
tison <[email protected]> 于2020年8月28日周五 上午1:50写道： > Hi Stanislav, > > The question you raise is a user question so I forward to user mailing > list. Please continue discussion here. > > The first thing I'd like to know in order to understand your question is > that what is "data changes" in your mind? > > ZooKeeper uses watcher mechanism to reflect to data changes, which is > designed possibly miss some changes. > > Best, > tison. > > > Stanislav Kozlovski <[email protected]> 于2020年8月28日周五 上午1:26写道： > >> Hello! >> >> We were investigating an issue with consistent reads in ZK which made us >> question our assumptions. >> We believe that ZK offers sequential consistency such that if a client >> creates a node with zxid 0x110000122a, it should be able to see (read) all >> data changes at least up to that zxid. >> >> Could I ask if this is a correct understanding? We seem to be seeing >> evidence that's pointing towards the opposite direction. >> >> Looking at the documentation >> < >> https://zookeeper.apache.org/doc/r3.1.2/zookeeperProgrammers.html#ch_zkGuarantees >> >, >> it does not seem to address this specific point. It says that "Updates >> from >> a client will be applied in the order that they were sent" and talks about >> "Consistent Cross-Client Views" but does not seem to address cross-client >> update order, unless I'm missing something. >> >> -- >> Best, >> Stanislav >> >
