Can I somehow get "documentVersion" for each doc back in the Update Response like the way we get _version back in Optimistic Concurrency when we set "version=true" in the update request? On Dec 14, 2015 10:58 PM, "Chris Hostetter" <hossman_luc...@fucit.org> wrote:
> > The _version_ field used to optimistic concurrency can't be user supplied > -- it's not just a record of the *document's* version, but actually a > record of the *update command* version -- so even deleteByQuery commands > have one -- and the order must (internally) increase across all types of > updates to a shard to ensure that they are executed in the correct order > across all replicas. > > However... > > Your use case sounds like an exact match for the > DocBasedVersionConstraintsProcessorFactory described here... > > > https://cwiki.apache.org/confluence/display/solr/Updating+Parts+of+Documents#UpdatingPartsofDocuments-DocumentCentricVersioningConstraints > > http://lucene.apache.org/solr/5_4_0/solr-core/org/apache/solr/update/processor/DocBasedVersionConstraintsProcessorFactory.html > > > > : Date: Mon, 14 Dec 2015 22:47:43 +0530 > : From: Debraj Manna <subharaj.ma...@gmail.com> > : Reply-To: solr-user@lucene.apache.org > : To: solr-user@lucene.apache.org > : Subject: Providing own _version field in solr doc > : > : We have a use case in which there are multiple clients writing > concurrently > : to solr. Each of the doc is having an 'timestamp' field which indicates > : when these docs were generated. > : > : We also have to ensure that any old doc doesn't overwrite any new doc in > : solr. So to achieve this we were thinking if we can make use of the > : _version field in solr doc and set the _version field equal to the > : 'timestamp' field that is present in each doc. > : > : Can someone let me know if the approach that we thought can be done? If > not > : can someone suggest some other approach of achieving the same with > minimum > : calls to solr? > : > > -Hoss > http://www.lucidworks.com/ >
