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From Apache Wiki <wikidi...@apache.org>
Subject [Solr Wiki] Update of "UpdateRequestProcessor" by PeterWolanin
Date Tue, 16 Oct 2012 02:00:01 GMT
Dear Wiki user,

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

The "UpdateRequestProcessor" page has been changed by PeterWolanin:
http://wiki.apache.org/solr/UpdateRequestProcessor?action=diff&rev1=14&rev2=15

  
  = Distributed Updates =
  
- Begining with [[Solr4.0]] all !UpdateRequestProcessorChains which include {{{RunUpdateProcessorFactory}}},
but do not include an implementation of the [[http://lucene.apache.org/solr/api/org/apache/solr/update/processor/DistributingUpdateProcessorFactory.html|DistributingUpdateProcessorFactory]]
will have an instance of {{{DistributedUpdateProcessorFactory}}} automaticly injected immediately
prior to the {{{RunUpdateProcessorFactory}}}.
+ Begining with [[Solr4.0]] all !UpdateRequestProcessorChains which include {{{RunUpdateProcessorFactory}}},
but do not include an implementation of the [[http://lucene.apache.org/solr/4_0_0/solr-core/org/apache/solr/update/processor/DistributingUpdateProcessorFactory.html|DistributingUpdateProcessorFactory]]
will have an instance of {{{DistributedUpdateProcessorFactory}}} automaticly injected immediately
prior to the {{{RunUpdateProcessorFactory}}}.
  
  In single-server instances, {{{DistributedUpdateProcessorFactory}}} is a No-Op, but for
Solr Cloud instances, it determines where the in the chain the request gets forwarded to the
leader (and other all other nodes in the shard). Processors prior to {{{DistributedUpdateProcessorFactory}}}
in the chain will be executed only on the first node to recieve the command, processors after
the {{{DistributedUpdateProcessorFactory}}} will be executed on every node in the appropriate
shard(s).
  

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