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- Need quick prototyping
- Want to avoid cloud costs
- Have < 1M vectors
- Need full control over data
### For Production at Scale
**Choose Pinecone or Milvus** if you:
- Have > 10M vectors
- Need 99.9% uptime SLA
- Want managed infrastructure
- Require horizontal scaling
### For Hybrid Workloads
**Choose Redis or Weaviate** if you:
- Already use Redis/have existing infrastructure
- Need both vector and traditional queries
- Want multi-modal search capabilities
- Require sub-10ms latency
### Cost Considerations
| Solution | Cost Model | Approximate Monthly Cost (1M vectors) |
| ------------ | -------------------- | ------------------------------------- |
| Pinecone | Per vector + queries | $70-150 |
| Qdrant Cloud | Per cluster | $100-300 |
| Self-hosted | Infrastructure only | $50-200 (AWS/GCP) |
| Chroma | Free (local) | $0 |
## Common Pitfalls and Best Practices
### Pitfalls to Avoid
1. **Dimension Mismatch**
- Problem: Using different embedding models for indexing and querying
- Solution: Always use the same model version and dimensions
2. **Not Normalizing Vectors**
- Problem: Inconsistent similarity scores
- Solution: Normalize vectors before indexing when using cosine similarity
3. **Ignoring Metadata Filtering**
- Problem: Returning irrelevant results despite high similarity
- Solution: Use metadata filters (date, category, access control)
4. **Over-indexing**
- Problem: Slow inserts and high memory usage
- Solution: Choose appropriate index parameters for your use case
### Best Practices
1. **Chunk Your Documents Wisely**
```python
# Good: Semantic boundaries
chunks = split_by_paragraphs(document, max_tokens=512)
# Bad: Fixed character count
chunks = [doc[i:i+1000] for i in range(0, len(doc), 1000)]
```
2. **Implement Hybrid Search**
- Combine vector search with keyword search for better results
- Use BM25 for keyword relevance + vector similarity
3. **Monitor Search Quality**
- Track metrics: precision@k, recall@k, MRR
- A/B test different embedding models
- Log user feedback on search results
4. **Handle Edge Cases**
- Empty queries: Provide fallback behavior
- Out-of-domain queries: Set similarity thresholds
- Rate limiting: Implement query throttling
## Scalability and Production Considerations
### Scaling Strategies
1. **Vertical Scaling**
- Add more RAM for larger indexes
- Use SSDs for faster disk operations
- GPU acceleration for similarity computation
2. **Horizontal Scaling**
- Shard by metadata (e.g., user_id, tenant_id)
- Replicate for read-heavy workloads
- Use load balancers for query distribution
3. **Index Optimization**
- **IVF (Inverted File)**: Good for 1M-10M vectors
- **HNSW**: Best for < 1M vectors with high recall
- **LSH**: Suitable for streaming data
### Production Checklist
- [ ] **Backup Strategy**: Regular snapshots, point-in-time recovery