Hi, Your attached picture didn't make it to the mailing list. And I suppose that you mean that a node is "active" if it's online and connected to ZK, right? If my assumptions are right then you can create an ephemeral node for each node, for example, /v1/active-node1 and /v2/active-node2. If one, or even both, of the nodes goes offline then its corresponding ephemeral node will be deleted by ZK once the session associated with that connection expires (~2 secs). Hope this helps.
Edward On Wed, Nov 13, 2013 at 5:23 AM, Techy Teck <[email protected]> wrote: > Suppose I have this hierarchy in my zookeeper schema. Attached is the > diagram. > > > > And there will be some children for /v1 and /v2 as well. > > > At some stage, I will be trying to retrieve children of /root parent node. > And depending on whether /v1 is active or /v2 is active, we will retrieve > its children. > Suppose if /v1 is active, then we will retrieve children of v1 and if v2 > is active, then we will retrieve children of v2. > > Now I am wondering, how to add this active(ness) as a part of znode? > Meaning how to make sure any one node is active at certain point so that > when I retrieve the children of root, I can tell which version is active > and then get the children of those version (v1 or v2) node > > Initially, I was thinking to add some data in /v1 and /v2 node which will > tell us which node is active from v1 and v2. > > But is there any other approach that I can use here? > >
