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Date: Tue, 6 Jan 2009 01:00:21 -0800 (PST)
From: Nuthan Ashkore <nuthanashkore@yahoo.com>
Reply-To: nuthanashkore@yahoo.com
Subject: group messaging, empheral nodes on zookeeper
To: zookeeper-user@hadoop.apache.org
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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 ?=20
What would be the best approach if I need to do group messaging using zooke=
eper 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 ser=
ver_1) ?
=A0=A0=A0 Is /nd_1 automatically deleted ?

2b: What happens if server_1 is disconnected from the rest of the group (se=
rver_2 to
=A0=A0=A0 server_5, but client c_1 still remains connected to server_1 ?
=A0=A0=A0 Is /nd_1 automatically deleted ?
=A0=A0=A0 What happens if server_1 regions the rest of the group ?
=A0=A0=A0 what happens to /nd_1 then ?

Thanks.
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