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https://issues.apache.org/jira/browse/ZOOKEEPER-107?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12619109#action_12619109
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Benjamin Reed commented on ZOOKEEPER-107:
-----------------------------------------

I think there are two issues here: 1) adding/removing servers to a ZooKeeper 
cluster and 2) letting clients know about the change. We should probably 
separate them. I like the URL idea for dealing with 1) (especially when used in 
conjunction with the other idea in this Jira of defining a URL scheme for 
ZooKeeper). For 2) I agree with Hiram that it should be stored persistently at 
each replica and changed via the replication protocol.

> Allow dynamic changes to server cluster membership
> --------------------------------------------------
>
>                 Key: ZOOKEEPER-107
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-107
>             Project: Zookeeper
>          Issue Type: Improvement
>          Components: server
>            Reporter: Patrick Hunt
>
> Currently cluster membership is statically defined, adding/removing hosts 
> to/from the server cluster dynamically needs to be supported.

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