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From Apache Wiki <wikidi...@apache.org>
Subject [Solr Wiki] Trivial Update of "SolrCloud" by Mark Miller
Date Sat, 04 Feb 2012 04:51:26 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Solr Wiki" for change notification.

The "SolrCloud" page has been changed by Mark Miller:
http://wiki.apache.org/solr/SolrCloud?action=diff&rev1=26&rev2=27

  
  Running multiple zookeeper servers in concert (a zookeeper ensemble) allows for high availability
of the zookeeper service.  Every zookeeper server needs to know about every other zookeeper
server in the ensemble, and a majority of servers are needed to provide service.  For example,
a zookeeper ensemble of 3 servers allows any one to fail with the remaining 2 constituting
a majority to continue providing service.  5 zookeeper servers are needed to allow for the
failure of up to 2 servers at a time.
  
- For production, it's recommended that you run an external zookeeper ensemble rather than
having Solr run embedded zookeeper servers.  You can read more about setting up a zookeeper
ensemble [[http://zookeeper.apache.org/doc/r3.3.4/zookeeperAdmin.html|here]]. For this example,
we'll use the embedded servers for simplicity.
+ For production, it's recommended that you run an external zookeeper ensemble rather than
having Solr run embedded zookeeper servers.  You can read more about setting up a zookeeper
ensemble [[http://zookeeper.apache.org/doc/r3.3.4/zookeeperStarted.html|here]]. For this example,
we'll use the embedded servers for simplicity.
  
  First, stop all 4 servers and then clean up the zookeeper data directories for a fresh start.
  

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