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From Jan Høydahl (JIRA) <j...@apache.org>
Subject [jira] [Commented] (SOLR-3167) Allow running embedded zookeeper 1 for 1 dynamically with solr nodes
Date Fri, 20 Jul 2012 09:07:34 GMT

    [ https://issues.apache.org/jira/browse/SOLR-3167?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419015#comment-13419015
] 

Jan Høydahl commented on SOLR-3167:
-----------------------------------

I was thinking "auto-everything" by default :) like ElasticSearch

# Start Solr on a node without any options other than telling it to start in cloud mode
## If -DzkHost is not specified it will try autoDiscover (through some 0-conf protocol) and
join existing ZK
## If no existing ZK found, spin up a local one
# Start Solr on another node, it will discover the existing one(s) without any host:port at
startup
## If "too few" ZK servers, will start another one and refresh the ZK list on all other nodes
## If "enough" ZK servers already, will simply join. Should also be possible to auto-start
ZK on another node if one master has failed.
                
> Allow running embedded zookeeper 1 for 1 dynamically with solr nodes
> --------------------------------------------------------------------
>
>                 Key: SOLR-3167
>                 URL: https://issues.apache.org/jira/browse/SOLR-3167
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Mark Miller
>            Assignee: Mark Miller
>
> Right now you have to decide which nodes run zookeeper up front - each node must know
the list of all the servers in the ensemble. Growing or shrinking the list of nodes requires
a rolling restart. https://issues.apache.org/jira/browse/ZOOKEEPER-1355 (Add zk.updateServerList(newServerList)
might be able to help us here. Perhaps the over seer could make a call to each replica when
the list changes and use the update server list call.

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