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The "UpdateJSON" page has been changed by TadhgMulkern: http://wiki.apache.org/solr/UpdateJSON?action=diff&rev1=13&rev2=14 }' }}} - == Atomic Updates with Optimistic Concurrency == + === Atomic Updates with Optimistic Concurrency === Solr 4.0 supports comes with a build in _version_ field that is automatically added by Solr, that allows you to perform [[Optimistic_Concurrency]] on Atomic Updates. Example: {{{
