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The "SolrCloud" page has been changed by Mark Miller: http://wiki.apache.org/solr/SolrCloud?action=diff&rev1=62&rev2=63 '''A:''' Try raising the ZooKeeper session timeout by editing solr.xml - see the zkClientTimeout attribute. The minimum session timeout is 2 times your ZooKeeper defined tickTime. The maximum is 20 times the tickTime. The default tickTime is 2 seconds. * '''Q:''' How do I use SolrCloud, but distribute updates myself? '''A:''' Add the following UpdateProcessorFactory somewhere in your update chain: '''NoOpDistributingUpdateProcessorFactory''' + * '''Q:''' What is the difference between a Collection and a SolrCore? + '''A:''' In classic single node Solr, a SolrCore is basically equivalent to a Collection. It presents one logical index. In SolrCloud, the SolrCore's on multiple nodes form a Collection. This is still just one logical index, but multiple SolrCores host different 'shards' of the full collection. So a SolrCore encapsulates a single physical index on an instance. A Collection is a combination of all of the SolrCores that together provide a logical index that is distributed across many nodes.
