> - Zookeeper. The issues here are similar to those for etcd. > Also, Zookeeper transactions don't seem to be isolated. Zookeeper transactions can be isolated depending on what level of isolation you need. A setData on a node operation can contain a version, so that it fails if that node has changed since the version. This means with a multi[1] of setData operations, you can effectively get a snapshot isolation level of isolation. For serializable, you could probably shoehorn it in by rewriting all nodes that you've written.
Regarding the notification issue, it sounds like what you'd want is to access the transaction log. ZooKeeper kinda does this with observer nodes, where the transaction log is shipped to read only nodes to scale out reads. OVN could do something similar where by each replica tails the transaction log directly, and applies the updates to their local copy. Note that the transaction log isn't officially exposed right now, but it's easy to get at, since observers already do it. -Ivan [1] zookeeper term for transaction _______________________________________________ dev mailing list dev@openvswitch.org http://openvswitch.org/mailman/listinfo/dev
