I think the core use case for it is optimistic concurrency https://solr.apache.org/guide/solr/latest/indexing-guide/partial-document-updates.html#optimistic-concurrency
On Wed, Oct 18, 2023 at 12:25 AM David Smiley <dsmi...@apache.org> wrote: > Question: Does the _version_ field have a purpose other than for "atomic > updates"? > I know SolrCloud and/or having an UpdateLog insists on it. But I don't > know if it's for that feature alone, or for additional non-obvious internal > workings of SolrCloud. Mostly I'm just asking to have a deeper > understanding; the field doesn't bother me. If someone knows of any docs > on it or old interesting JIRAs to read, I'd appreciate it. > > ~ David Smiley > Apache Lucene/Solr Search Developer > http://www.linkedin.com/in/davidwsmiley > -- http://www.needhamsoftware.com (work) https://a.co/d/b2sZLD9 (my fantasy fiction book)
