Rakam System Vectorstore

The vectorstore package of Rakam Systems providing vector database solutions and document processing capabilities.

Overview

rakam-systems-vectorstore provides comprehensive vector storage, embedding models, and document loading capabilities. This package depends on rakam-systems-core.

Features

• Configuration-First Design: Change your entire vector store setup via YAML - no code changes
• Multiple Backends: PostgreSQL with pgvector and FAISS in-memory storage
• Flexible Embeddings: Support for SentenceTransformers, OpenAI, and Cohere
• Document Loaders: PDF, DOCX, HTML, Markdown, CSV, and more
• Search Capabilities: Vector search, keyword search (BM25), and hybrid search
• Chunking: Intelligent text chunking with context preservation
• Configuration: Comprehensive YAML/JSON configuration support

🎯 Configuration Convenience

The vectorstore package's configurable design allows you to:

• Switch embedding models without code changes (local ↔ OpenAI ↔ Cohere)
• Change search algorithms instantly (BM25 ↔ ts_rank ↔ hybrid)
• Adjust search parameters (similarity metrics, top-k, hybrid weights)
• Toggle features (hybrid search, caching, reranking)
• Tune performance (batch sizes, chunk sizes, connection pools)
• Swap backends (FAISS ↔ PostgreSQL) by updating config

Example: Test different embedding models to find the best accuracy/cost balance - just update your YAML config file, no code changes needed!

Installation

# Requires core package
pip install rakam-systems-core

# Install vectorstore package
pip install rakam-systems-vectorstore

# With specific backends
pip install rakam-systems-vectorstore[postgres]
pip install rakam-systems-vectorstore[faiss]
pip install rakam-systems-vectorstore[all]

Quick Start

FAISS Vector Store (In-Memory)

from rakam_systems_vectorstore.components.vectorstore.faiss_vector_store import FaissStore
from rakam_systems_vectorstore.core import Node, NodeMetadata

# Create store
store = FaissStore(
    name="my_store",
    base_index_path="./indexes",
    embedding_model="Snowflake/snowflake-arctic-embed-m",
    initialising=True
)

# Create nodes
nodes = [
    Node(
        content="Python is great for AI",
        metadata=NodeMetadata(source_file_uuid="doc1", position=0)
    )
]

# Add and search
store.create_collection_from_nodes("my_collection", nodes)
results, _ = store.search("my_collection", "AI programming", number=5)

PostgreSQL Vector Store

import os
import django
from django.conf import settings

# Configure Django (required)
if not settings.configured:
    settings.configure(
        INSTALLED_APPS=[
            'django.contrib.contenttypes',
            'rakam_systems_vectorstore.components.vectorstore',
        ],
        DATABASES={
            'default': {
                'ENGINE': 'django.db.backends.postgresql',
                'NAME': os.getenv('POSTGRES_DB', 'vectorstore_db'),
                'USER': os.getenv('POSTGRES_USER', 'postgres'),
                'PASSWORD': os.getenv('POSTGRES_PASSWORD', 'postgres'),
                'HOST': os.getenv('POSTGRES_HOST', 'localhost'),
                'PORT': os.getenv('POSTGRES_PORT', '5432'),
            }
        },
        DEFAULT_AUTO_FIELD='django.db.models.BigAutoField',
    )
    django.setup()

from rakam_systems_vectorstore import ConfigurablePgVectorStore, VectorStoreConfig

# Create configuration
config = VectorStoreConfig(
    embedding={
        "model_type": "sentence_transformer",
        "model_name": "Snowflake/snowflake-arctic-embed-m"
    },
    search={
        "similarity_metric": "cosine",
        "enable_hybrid_search": True
    }
)

# Create and use store
store = ConfigurablePgVectorStore(config=config)
store.setup()
store.add_nodes(nodes)
results = store.search("What is AI?", top_k=5)
store.shutdown()

Core Components

Vector Stores

• ConfigurablePgVectorStore: PostgreSQL with pgvector, supports hybrid search and keyword search
• FaissStore: In-memory FAISS-based vector search

Embeddings

• ConfigurableEmbeddings: Supports multiple backends
  • SentenceTransformers (local)
  • OpenAI embeddings
  • Cohere embeddings

Document Loaders

• AdaptiveLoader: Automatically detects and loads various file types
• PdfLoader: Advanced PDF processing with Docling
• PdfLoaderLight: Lightweight PDF to markdown conversion
• DocLoader: Microsoft Word documents
• OdtLoader: OpenDocument Text files
• MdLoader: Markdown files
• HtmlLoader: HTML files
• EmlLoader: Email files
• TabularLoader: CSV, Excel files
• CodeLoader: Source code files

Chunking

• TextChunker: Sentence-based chunking with Chonkie
• AdvancedChunker: Context-aware chunking with heading preservation

Package Structure

rakam-systems-vectorstore/
├── src/rakam_systems_vectorstore/
│   ├── core.py                  # Node, VSFile, NodeMetadata
│   ├── config.py                # VectorStoreConfig
│   ├── components/
│   │   ├── vectorstore/         # Store implementations
│   │   │   ├── configurable_pg_vectorstore.py
│   │   │   └── faiss_vector_store.py
│   │   ├── embedding_model/     # Embedding models
│   │   │   └── configurable_embeddings.py
│   │   ├── loader/              # Document loaders
│   │   │   ├── adaptive_loader.py
│   │   │   ├── pdf_loader.py
│   │   │   ├── pdf_loader_light.py
│   │   │   └── ... (other loaders)
│   │   └── chunker/             # Text chunkers
│   │       ├── text_chunker.py
│   │       └── advanced_chunker.py
│   ├── docs/                    # Package documentation
│   └── server/                  # MCP server
└── pyproject.toml

Search Capabilities

Vector Search

Semantic similarity search using embeddings:

results = store.search("machine learning algorithms", top_k=10)

Keyword Search (BM25)

Full-text search with BM25 ranking:

results = store.keyword_search(
    query="machine learning",
    top_k=10,
    ranking_algorithm="bm25"
)

Hybrid Search

Combines vector and keyword search:

results = store.hybrid_search(
    query="neural networks",
    top_k=10,
    alpha=0.7  # 70% vector, 30% keyword
)

Configuration

From YAML

# vectorstore_config.yaml
name: my_vectorstore

embedding:
  model_type: sentence_transformer
  model_name: Snowflake/snowflake-arctic-embed-m
  batch_size: 128
  normalize: true

database:
  host: localhost
  port: 5432
  database: vectorstore_db
  user: postgres
  password: postgres

search:
  similarity_metric: cosine
  default_top_k: 5
  enable_hybrid_search: true
  hybrid_alpha: 0.7

index:
  chunk_size: 512
  chunk_overlap: 50

config = VectorStoreConfig.from_yaml("vectorstore_config.yaml")
store = ConfigurablePgVectorStore(config=config)

Examples

See the examples/ai_vectorstore_examples/ directory in the main repository for complete examples:

• Basic FAISS example
• PostgreSQL example
• Configurable vectorstore examples
• PDF loader examples
• Keyword search examples

Environment Variables

• POSTGRES_HOST: PostgreSQL host (default: localhost)
• POSTGRES_PORT: PostgreSQL port (default: 5432)
• POSTGRES_DB: Database name (default: vectorstore_db)
• POSTGRES_USER: Database user (default: postgres)
• POSTGRES_PASSWORD: Database password
• OPENAI_API_KEY: For OpenAI embeddings
• COHERE_API_KEY: For Cohere embeddings
• HUGGINGFACE_TOKEN: For private HuggingFace models