you can still use the SignatureUpdateProcessorFactory for your usecase, just don't configure teh signatureField to be the same as your uniqueKey field.
configure some othe fieldname (ie "signature") instead. : Date: Tue, 14 Oct 2014 12:08:26 +0330 : From: Ali Nazemian <alinazem...@gmail.com> : Reply-To: solr-user@lucene.apache.org : To: "solr-user@lucene.apache.org" <solr-user@lucene.apache.org> : Subject: mark solr documents as duplicates on hashing the combination of some : fields : : Dear all, : Hi, : I was wondering how can I mark some documents as duplicate (just marking : for future usage not deleting) based on the hash combination of some : fields? Suppose I have 2 fields name "url" and "title" I want to create : hash based on url+title and send it to another field name "signature". If I : do that using solr dedup, it will be resulted to deleting duplicate : documents! So it is not applicable for my situation. Thank you very much. : Best regards. : : -- : A.Nazemian : -Hoss http://www.lucidworks.com/