18
Accepted answer
Prefer a staging table plus validation gate before promoting to prod tables.
Migrated stacks last quarter and this regression appeared. Stack trace and plan attached:
Context: EMR on EKS vs traditional EMR for Spark, ops overhead?
Happy to share schema snippets or metrics if useful.
Accepted answer
Prefer a staging table plus validation gate before promoting to prod tables.
Idempotent writes with merge keys saved us during backfills.
Document the grain decision, most BI bugs turn out to be grain bugs.
Prefer a staging table plus validation gate before promoting to prod tables.
Sign in to reply.