grepai-storage-qdrant

SKILL.md

GrepAI Storage with Qdrant

This skill covers using Qdrant as the storage backend for GrepAI, offering high-performance vector search.

When to Use This Skill

Need fastest possible search performance

Very large codebases (50K+ files)

Already using Qdrant infrastructure

Want advanced vector search features

What is Qdrant?

Qdrant is a purpose-built vector database offering:

⚡ Extremely fast vector similarity search

📏 Excellent scalability

🔧 Advanced filtering capabilities

🐳 Easy Docker deployment

Prerequisites

Qdrant server running

Network access to Qdrant

Advantages

Benefit
Description

⚡ Performance
Fastest vector search

📏 Scalability
Handles millions of vectors

🔍 Advanced
Filtering, payloads, sharding

🐳 Easy deploy
Docker-ready

☁️ Cloud option
Qdrant Cloud available

Setting Up Qdrant

Option 1: Docker (Recommended)

# Run Qdrant with persistent storage
docker run -d \
  --name grepai-qdrant \
  -p 6333:6333 \
  -p 6334:6334 \
  -v qdrant_storage:/qdrant/storage \
  qdrant/qdrant

Ports:

6333: REST API

6334: gRPC API (used by GrepAI)

Option 2: Docker Compose

# docker-compose.yml
version: '3.8'
services:
  qdrant:
    image: qdrant/qdrant
    ports:
      - "6333:6333"
      - "6334:6334"
    volumes:
      - qdrant_storage:/qdrant/storage
    environment:
      - QDRANT__SERVICE__GRPC_PORT=6334

volumes:
  qdrant_storage:

docker-compose up -d

Option 3: Qdrant Cloud

Sign up at cloud.qdrant.io

Create a cluster

Get your endpoint and API key

Configuration

Basic Configuration (Local)

# .grepai/config.yaml
store:
  backend: qdrant
  qdrant:
    endpoint: localhost
    port: 6334

With TLS (Production)

store:
  backend: qdrant
  qdrant:
    endpoint: qdrant.company.com
    port: 6334
    use_tls: true

With API Key (Qdrant Cloud)

store:
  backend: qdrant
  qdrant:
    endpoint: your-cluster.aws.cloud.qdrant.io
    port: 6334
    use_tls: true
    api_key: ${QDRANT_API_KEY}

Set the environment variable:

export QDRANT_API_KEY="your-api-key"

Configuration Options

Option
Default
Description

endpoint
localhost
Qdrant server hostname

port
6334
gRPC port

use_tls
false
Enable TLS encryption

api_key
none
Authentication key

Verifying Setup

Check Qdrant is Running

# REST API health check
curl http://localhost:6333/health

# Expected: {"status":"ok"}

Check Collections (after indexing)

# List collections
curl http://localhost:6333/collections

# Get collection info
curl http://localhost:6333/collections/grepai

From GrepAI

grepai status

# Should show Qdrant backend info

Qdrant Dashboard

Access the web dashboard at http://localhost:6333/dashboard:

View collections

Browse vectors

Execute queries

Monitor performance

Performance Characteristics

Search Latency

Codebase Size
Vectors
Search Time

Small (1K files)
5,000
<10ms

Medium (10K files)
50,000
<20ms

Large (100K files)
500,000
<50ms

Memory Usage

Qdrant loads vectors into memory for fast search:

Vectors
Dimensions
Memory

10,000
768
~60 MB

100,000
768
~600 MB

1,000,000
768
~6 GB

Advanced Configuration

Qdrant Server Configuration

Create config/production.yaml:

storage:
  storage_path: /qdrant/storage

service:
  grpc_port: 6334
  http_port: 6333
  max_request_size_mb: 32

optimizers:
  memmap_threshold_kb: 200000
  indexing_threshold_kb: 50000

Mount in Docker:

docker run -d \
  -v ./config:/qdrant/config \
  -v qdrant_storage:/qdrant/storage \
  qdrant/qdrant

Collection Settings

GrepAI creates a collection named grepai with:

Vector size: matches your embedding dimensions

Distance: Cosine similarity

On-disk storage for large datasets

Clustering (Advanced)

For very large deployments, Qdrant supports distributed mode:

# qdrant config
cluster:
  enabled: true
  p2p:
    port: 6335

Backup and Restore

Snapshot Creation

# Create snapshot via REST API
curl -X POST 'http://localhost:6333/collections/grepai/snapshots'

Restore Snapshot

# Restore from snapshot
curl -X PUT 'http://localhost:6333/collections/grepai/snapshots/recover' \
  -H 'Content-Type: application/json' \
  -d '{"location": "/path/to/snapshot"}'

Migrating from GOB

Start Qdrant:

docker run -d --name qdrant -p 6333:6333 -p 6334:6334 qdrant/qdrant

Update configuration:

store:
  backend: qdrant
  qdrant:
    endpoint: localhost
    port: 6334

Delete old index:

rm .grepai/index.gob

Re-index:

grepai watch

Migrating from PostgreSQL

Start Qdrant

Update configuration to use Qdrant

Re-index (embeddings must be regenerated)

Common Issues

❌ Problem: Connection refused
✅ Solution: Ensure Qdrant is running:

docker ps | grep qdrant
docker start grepai-qdrant

❌ Problem: gRPC connection failed
✅ Solution: Check port 6334 is exposed:

docker run -p 6334:6334 ...

❌ Problem: Authentication failed
✅ Solution: Check API key:

echo $QDRANT_API_KEY

❌ Problem: Out of memory
✅ Solutions:

Enable on-disk storage in Qdrant config

Increase Docker memory limit

Use Qdrant Cloud for managed scaling

❌ Problem: Slow initial indexing
✅ Solution: This is normal; Qdrant optimizes in background. Searches will be fast after indexing completes.

Qdrant vs PostgreSQL

Feature
Qdrant
PostgreSQL

Search speed
⚡⚡⚡
⚡⚡

Setup complexity
Easy (Docker)
Medium

SQL queries
❌
✅

Scalability
Excellent
Good

Memory efficiency
Excellent
Good

Team familiarity
Lower
Higher

Recommendation: Use Qdrant for large codebases or maximum performance. Use PostgreSQL if you need SQL integration or team is familiar with it.

Best Practices

Use persistent volume: Mount /qdrant/storage

Enable TLS in production: Set use_tls: true

Secure API key: Use environment variables

Monitor memory: Vector search is memory-intensive

Regular snapshots: Backup before major changes

Output Format

Qdrant storage status:

✅ Qdrant Storage Configured

   Backend: Qdrant
   Endpoint: localhost:6334
   TLS: disabled
   Collection: grepai

   Contents:
   - Files: 5,000
   - Vectors: 25,000
   - Dimensions: 768

   Performance:
   - Connection: OK
   - Indexed: Yes
   - Search latency: ~15ms