For OpenSearch alternatives, run the same representative index and query mix on each candidate.
- Ingest real-shaped documents with nested fields and high-cardinality values.
- Compare full-text relevance, filters, aggregations, and p95 latency.
- Test mapping changes, reindexing, retention, and snapshot restore.
- Exercise access roles, auditability, and a node failure.
- Include storage, compute, and operator time in cost estimates.
A search engine can pass a small query demo yet fail under write load or schema evolution. Evaluate the full lifecycle.