I believe the dense_vector is not part of OpenSearch as it was not part of the OSS version of ElasticSearch?
Is there any (existing or planned) drop in replacements for dense_vector in OpenSearch? Or do I need to use something different and apply different logic and configuration? The knn_vector looks like it provides similar functionality
I wouldn’t expect drop-in replacements for any feature that isn’t yet covered. The roadmaps are distinct between OpenSearch and ES, so while it’s totally possible that similar functionality exists or is planned, there is no plans to maintain compatibility or API parity. It could happen by accident, but it’s not a goal.