# Dify and Singdata Lakehouse Integration Overview

## **Background**

**Dify Platform and Provider Architecture Introduction**

[Dify](https://dify.ai/) is an open-source large language model (LLM) application development platform that combines Backend-as-a-Service (BaaS) and LLMOps principles. As an abbreviation of "Define + Modify", Dify is dedicated to helping developers quickly build production-grade generative AI applications.

**Dify Core Features**:

- 🚀 **Rapid Development**: Visual prompt orchestration interface, supports hundreds of AI models, comprehensive knowledge base management
- 🔧 **Complete Tech Stack**: Built-in high-quality RAG engine, powerful Agent framework, and flexible workflows
- 🌐 **Open Ecosystem**: Apache License 2.0 open-source protocol, supports self-deployment and data control
- 🛠️ **Rich Features**: Supports multiple built-in tools and deployment options (Docker, Helm)

**Dify Provider Architecture Core Concepts**

Dify adopts the Provider architecture pattern to achieve decoupled integration with external services. This is a mature software design pattern, analogous to the "service provider" concept in cloud computing. In the Dify architecture, Providers assume the following key roles:

**Provider Categories and Responsibilities**:

- 🤖 **Model Providers**: Provide AI model services (LLM, Embedding, TTS, etc.)
  * Examples: OpenAI, Anthropic, Azure OpenAI, local models
- 🔍 **Vector Database Providers**: Provide vector storage and retrieval services
  * Examples: Qdrant, Milvus, Weaviate, Singdata (Singdata Lakehouse)
- 💾 **Storage Providers**: Provide file storage services
  * Examples: AWS S3, Azure Blob, Alibaba Cloud OSS, Singdata Volume (Singdata Lakehouse Volume)
- 🛠️ **Tool Providers**: Provide functional tool collections
  * Examples: search tools, API call tools, data processing tools

**Provider Architecture Advantages**:

- ✅ **Standardized Interface**: Unified integration approach, reducing development and maintenance costs
- ✅ **Pluggable Design**: Providers can be freely switched without modifying core code
- ✅ **Strong Extensibility**: New Providers can be integrated non-invasively into existing systems
- ✅ **Flexible Configuration**: Provider parameters managed flexibly via environment variables and configuration files
- ✅ **Vendor Neutrality**: Avoids vendor lock-in, supports multi-cloud and hybrid cloud deployment

**The Unique Positioning of Singdata Lakehouse as a Provider**

Unlike traditional single-function Providers, **Singdata Lakehouse** plays a **multi-role Provider** in Dify:

1\. **Vector Database Provider**: Provides HNSW vector indexing, inverted index, and hybrid search

2\. **Storage Provider**: Provides Volume storage, multi-tenant isolation, and cross-cloud compatibility

3\. **Compute Provider**: Provides elastic computing, SQL querying, and data processing capabilities

This "one Provider, multiple roles" design is the core value proposition of the lakehouse architecture.

**Singdata Lakehouse Introduction**

Singdata Lakehouse is an innovative cloud-native lakehouse integrated data platform, adopting a fully managed service model that fundamentally transforms enterprise data management. Built from the ground up with a new cloud-native design philosophy, it is equipped with a self-developed next-generation SQL computing engine.

**Singdata Lakehouse Core Advantages**:

- 🏗️ **Lakehouse Unification**: Seamlessly integrates data warehouse, data lake, real-time processing, and business intelligence
- ⚡ **Industry-Leading Performance**: 9.84x Trino performance on TPC-H 100GB benchmark
- 🌊 **Extreme Elasticity**: Serverless architecture, second-level start/stop, on-demand scaling, per-second billing
- 🤖 **AI-Native**: Natively supports vector search, HNSW indexing, and AI model integration
- 🔓 **Open Architecture**: Supports mainstream open-source formats, no vendor lock-in
- ☁️ **Multi-Cloud Support**: Covers Alibaba Cloud, Tencent Cloud, AWS, GCP, and other major cloud platforms

**Singdata Lakehouse Provider's Integration Value and Technical Comparison**

Based on in-depth analysis of the existing Dify Provider ecosystem, the Singdata Lakehouse Provider offers unique technical advantages. Currently, Dify supports 32 vector database Providers (including Qdrant, Milvus, Weaviate, pgvector, etc.) and 17 storage Providers (AWS S3, Azure Blob, Alibaba Cloud OSS, etc.), but all adopt a **separated Provider architecture**.

**Traditional Separated Provider Architecture vs. Singdata Unified Provider Architecture**:

**Technical Challenges of Existing Solutions**:

:-: ![](.topwrite/assets/image_1756879734460.png =734)

***

**Key Technical Difference Analysis**:

1\. **Provider Integration Complexity**

* Traditional approach: Requires configuring Storage Provider (S3/OSS) + Vector Provider (Qdrant/Milvus), maintaining dual data mappings
* Singdata Lakehouse approach: Single Provider provides both Volume storage + Vector indexing, with automatic metadata synchronization

2\. **Unified Retrieval Capability Comparison**

**Traditional Separated Approach**:

```Python
```

Vector search: Qdrant/Milvus:

```Python
vector_results = qdrant_client.search(vector=query_vector, limit=top_k)

```

Full-text search: requires Elasticsearch:

```Python
text_results = elasticsearch.search(query=text_query)

```

Hybrid search: requires application-level fusion:

```Python
combined_results = merge_and_rank(vector_results, text_results)
```

**Singdata Lakehouse Unified Approach**:

```Python
```

Vector search - HNSW index:

```Python
vector_results = client.execute("""
    SELECT content, metadata, 
           COSINE_DISTANCE(vector, CAST(? AS VECTOR(1536))) as score
    FROM dataset_table 
    ORDER BY score LIMIT ?
""", [query_vector, top_k])

```

Full-text search - inverted index (Chinese word segmentation):

```Python
text_results = client.execute("""
    SELECT content, metadata, SCORE(content) as score
    FROM dataset_table 
    WHERE MATCH_ALL(content, ?)
    ORDER BY score DESC LIMIT ?
""", [text_query, top_k])

```

SQL Like search - fallback option:

```Python
like_results = client.execute("""
    SELECT content, metadata, 0.5 as score
    FROM dataset_table 
    WHERE content LIKE ?
    LIMIT ?
""", [f"%{text_query}%", top_k])

```

Hybrid search - unified single SQL processing:

```Python
hybrid_results = client.execute("""
    SELECT content, metadata,
           (COSINE_DISTANCE(vector, CAST(? AS VECTOR(1536))) * 0.7 + 
            SCORE(content) * 0.3) as combined_score
    FROM dataset_table 
    WHERE MATCH_ALL(content, ?)
    ORDER BY combined_score DESC LIMIT ?
""", [query_vector, text_query, top_k])
```

3\. **Performance Optimization Strategy Comparison**

* pgvector: Limited to ≤2000 dimensions, standalone HNSW index
* Milvus: Distributed architecture, requires independent cluster operations
* Singdata: CRU-based elastic computing, automatic resource scheduling, 9.84x leading performance in TPC-H benchmarks

4\. **Provider Configuration Cross-Cloud Compatibility**

```Python
```

Traditional separated Provider approach: cross-cloud migration requires modifying multiple Provider configs:

```Python
```

Migrating from AWS S3 to Alibaba Cloud OSS:

```Python
STORAGE_TYPE = 's3'          # needs to be changed to 'aliyun-oss'
AWS_ACCESS_KEY = '...'       # needs to be changed to ALIYUN_OSS_ACCESS_KEY
AWS_SECRET_KEY = '...'       # needs to be changed to ALIYUN_OSS_SECRET_KEY
VECTOR_STORE = 'qdrant'      # Vector Provider may also need adjustment

```

Singdata unified Provider approach: Volume abstraction layer shields cloud storage differences:

```Python
STORAGE_TYPE = 'clickzetta-volume'  # unchanged across clouds
VECTOR_STORE = 'clickzetta'         # unchanged across clouds
CLICKZETTA_VOLUME_TYPE = 'user'     # unchanged across clouds
```

Singdata Provider backend auto-adapts to underlying cloud storage:

```Python
```

^

## **Goals**

**Primary Goals**:

* 🎯 Provide Dify with a unified lakehouse storage solution
* 🚀 Achieve high-performance vector retrieval and full-text search
* 📈 Support storage and processing of large-scale datasets
* 🔧 Provide a complete Provider integration solution
* 🛡️ Ensure enterprise-grade security and reliability

**Technical Goals**:

* Achieve high-performance vector retrieval based on Singdata Lakehouse elastic computing
* Leverage cloud object storage to support massive document storage
* Multi-tenant data isolation and permission management
* Hybrid search (vector + full-text) capabilities
* Serverless elastic scaling and pay-as-you-go billing

## **Core Value**

**For Users**:

- 📚 **Unified Knowledge Base**: File storage, vector retrieval, and full-text search integrated into one
- 🔍 **Multi-Mode Retrieval**: HNSW vector search + inverted index full-text search + SQL Like + hybrid search, covering all Dify scenarios
- ⚡ **Elastic Computing**: CRU-based Serverless computing, second-level start/stop and scaling
- 🔒 **Enterprise-Grade Security**: Complete permission management and data isolation
- 💰 **Cost Optimization**: Storage-compute separation, per-second billing based on actual usage
- 🌐 **Cross-Cloud Compatibility**: Lakehouse Volume shields cloud storage differences, zero code changes for cross-cloud migration
