Chunking Strategy
Recommend chunking granularity based on data characteristics: 256-512 characters for fact-intensive Q&A scenarios, 1024-2048 characters for long coherent discussion scenarios; support fixed-length, semantic, and recursive chunking methods; suggest an overlap ratio of 10%-30% (higher ratios are needed for technical documents with many cross-references).
Vector Databases and Embedding Models
Vector databases: Recommend mainstream options like Milvus and Pinecone based on data scale, query latency, and filtering requirements; Embedding models: General models (e.g., OpenAI text-embedding-3-large) are suitable for broad scenarios, while domain-specific models (CodeBERT, Legal-BERT) perform better on professional datasets. At the same time, balance dimension size (high-dimensional encoding enriches semantics but has higher costs, while low-dimensional encoding is lightweight and efficient).
Retrieval Strategy
Support pure vector, keyword, and hybrid retrieval; decide whether to introduce re-ranking models (recall candidate documents initially, then use cross-encoders for fine-grained sorting) based on latency budgets and accuracy requirements.