13 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.
Set up pgBackRest against S3-compatible object storage (MinIO as the open source example), then recover Postgres to any moment in the past, including the second before someone ran a bad DELETE.
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...
Partial update or patching JSON involves making changes to specific parts of a JSON document without replacing the entire document. This is particularly useful when you only need to modify certain fields or elements within a large JSON object, rather...
MysticMind.PostgresEmbed v4.0 released with support for .NET 8 and few enhancements. This library provides minimum Postgres binaries for development or unit testing purposes. This library has had around 92K NuGet downloads so far. https://github.com/...