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The "Optimistic_Concurrency" page has been changed by TadhgMulkern: http://wiki.apache.org/solr/Optimistic_Concurrency?action=diff&rev1=1&rev2=2 = Optimistic Concurrency = - A new feature in Solr 4.0 is Optimistic Locking, along with [[RealTimeGet]] and [[Atomic_Updates]] it allows Solr to be used as a NoSQL Database. It allows a conditional update based on document _version_. Using optimistic concurrency normally involves the following READ-MODIFY-WRITE process. + A new feature in Solr 4.0 is Optimistic Locking, along with [[RealTimeGet]] and [[Atomic_Updates]] it allows Solr to be used as a NoSQL Database. It allows a conditional update based on document _version_. See http://wiki.apache.org/solr/Per%20Steffensen/Update%20semantics for more detail
