Rebuilding Elasticsearch Under Load: Unsafe Watermarks and a Sampling Blind Spot

Rebuilding an Elasticsearch index from PostgreSQL sounds simple: Create a new index. Copy the rows that belong in search. Replay anything that changed during the copy. Verify the result. Move the search alias. The difficult part is deciding where the bulk copy ends and the replay begins. Weiterlesen: Rebuilding Elasticsearch Under Load: Unsafe Watermarks and a Sampling…