10 posts
Build semantic search and a small RAG pipeline over 42,000 movie plots using nothing but Postgres. Marten's new pgvector package stores and searches the embeddings, Ollama generates them locally, and there is not an API key in sight.
Turn the same Marten + pgvector + Ollama stack from Part 1 into a question-answering assistant over the Marten documentation. The new ingredient is chunking: splitting long markdown pages into retrievable passages, then citing the exact page each answer draws from.
The structural problem DCB solves: business rules that span multiple aggregates and cannot be defended by per-stream optimistic concurrency.
We build the coupon redemption command from Part 1 using Marten's DCB API: tag types, BoundaryAggregate, FetchForWritingByTags, and the explicit ConcurrencyException retry cycle.
We rebuild the redemption command from Part 2 using Wolverine.HTTP with a [WolverinePost] endpoint, where the HTTP route, the DCB consistency boundary, and the business decision live in one static method. Includes an Alba HTTP test.
Tag storage modes, the global-lock failure mode of over-broad queries, tag governance, schema evolution, incremental migration from existing aggregates, and when DCB is the wrong tool.
Protecting Personally Identifiable Information (PII) has become essential as organizations handle increasing volumes of sensitive data. Regulations like the GDPR (General Data Protection Regulation) mandate strict controls over PII to safeguard indiv...
Protecting Personally Identifiable Information (PII) has become essential as organizations handle increasing volumes of sensitive data. Regulations like the GDPR (General Data Protection Regulation) mandate strict controls over PII to safeguard indiv...
Protecting Personally Identifiable Information (PII) has become essential as organizations handle increasing volumes of sensitive data. Regulations like the GDPR (General Data Protection Regulation) mandate strict controls over PII to safeguard indiv...
This is a continuation of the Marten native partial updates patching post. All the native patch operations are driven by a bunch of custom PL/pgSQL functions with prefix mt_jsonb_. Marten uses JSONB for all its JSON storage hence all th...