With respect to your 2nd question (in case it didn't get answered) nothing happens to the ephemeral nodes. as long as the client is able to talk to any active server before the session timeout the ephemeral nodes will stay.
ben ________________________________________ From: Nuthan Ashkore [nuthanashk...@yahoo.com] Sent: Tuesday, January 06, 2009 1:00 AM To: firstname.lastname@example.org Subject: group messaging, empheral nodes on zookeeper I've 2 separate questions regarding zookeeper: 1. Group Messaging: Is it possible to do group messaging with zookeeper 3.0.1 ? If not, are there any plans to add group messaging (say w/ casual ordering or even better total ordering) to future releases ? What would be the best approach if I need to do group messaging using zookeeper right now, should I use a separate group messaging or messaging broker service ? 2. What happens to Empheral Nodes when a zookeeper server (not client) dies or is separated from the group ? Supposing there are 5 zookeeper servers: server_1, ..., server_5 And a client c_1 connects to server_1 and creates an empheral node /nd_1 2a: What happens if server_1 dies/crashes (and c_1 is disconnected from server_1) ? Is /nd_1 automatically deleted ? 2b: What happens if server_1 is disconnected from the rest of the group (server_2 to server_5, but client c_1 still remains connected to server_1 ? Is /nd_1 automatically deleted ? What happens if server_1 regions the rest of the group ? what happens to /nd_1 then ? Thanks.