ComfyUI-ModelSync

Model Auto-Update & Multi-GPU Sync for ComfyUI

A custom node extension that provides:

• Model Version Tracking - Detect when HuggingFace/CivitAI models have updates
• Auto-Update System - Configurable automatic model downloads
• Multi-GPU Sync - Sync models to secondary machines filtered by VRAM capacity
• Metadata Management - Track installed models with hashes, versions, sources

Features

Model Version Tracking

• Automatically detect updates for models from HuggingFace and CivitAI
• Compare local files with remote versions using SHA256 hashes
• Cache version information to minimize API calls

Auto-Update System

• Background scheduler for periodic update checks
• Configurable update intervals
• Automatic downloads with hash verification
• Backup old versions before updating

Multi-GPU Sync

• Sync models to secondary machines using rsync over SSH
• Filter models by VRAM requirements
• Generate standalone sync scripts for manual execution
• Configurable per-target settings

Web UI

• Integrated panel in ComfyUI interface
• View all tracked models and their status
• Configure sync targets and settings
• Trigger manual updates and syncs

Installation

Using ComfyUI Manager (Recommended)

Search for "ModelSync" in ComfyUI Manager and install.

Manual Installation

1. Clone this repository into your ComfyUI custom_nodes directory:

   cd ComfyUI/custom_nodes
   git clone https://github.com/benfinklea/ComfyUI-ModelSync.git
   

2. Install dependencies:

   cd ComfyUI-ModelSync
   pip install -r requirements.txt
   

3. Restart ComfyUI

Usage

Web Interface

1. Click the "Model Sync" button in the ComfyUI menu

2. Models Tab: View and manage tracked models

   • Click "Scan" to discover models in your models directory
   • Click "Check Updates" to query HuggingFace/CivitAI for updates
   • Enable auto-update per model using the checkbox
   • Click "Download" to update individual models

3. Sync Targets Tab: Configure machines to sync to

   • Add targets with SSH host and models path
   • Set VRAM limits to filter which models sync
   • Click "Sync Now" to sync to a specific target

4. Settings Tab: Configure global options

   • Enable/disable auto-update
   • Set check interval
   • Toggle download verification and backups

API Endpoints

Endpoint	Method	Description
/modelsync/models	GET	List all tracked models
/modelsync/models/scan	POST	Scan filesystem for models
/modelsync/models/{id}	GET	Get model details
/modelsync/models/{id}	PATCH	Update model settings
/modelsync/check	POST	Check models for updates
/modelsync/download/{id}	POST	Download model update
/modelsync/config	GET/POST	Get/set configuration
/modelsync/targets	GET/POST	List/add sync targets
/modelsync/targets/{id}	DELETE	Remove sync target
/modelsync/sync/{id}	POST	Sync to specific target
/modelsync/sync	POST	Sync to all targets
/modelsync/status	GET	Get overall status

Setting Model Sources

To enable update checking for a model, set its source URL:

curl -X PATCH http://localhost:8188/modelsync/models/1 \
  -H "Content-Type: application/json" \
  -d '{"source_url": "https://huggingface.co/stabilityai/sdxl-vae/resolve/main/sdxl_vae.safetensors"}'

Or use the optional workflow node "Set Model Source".

Configuring Sync Targets

Add a sync target:

curl -X POST http://localhost:8188/modelsync/targets \
  -H "Content-Type: application/json" \
  -d '{
    "name": "secondary-gpu",
    "ssh_host": "user@192.168.1.100",
    "model_path": "/home/user/ComfyUI/models",
    "max_vram_mb": 16000
  }'

VRAM Filtering

Models are filtered based on estimated VRAM requirements:

Pattern	Estimated VRAM
wan, hunyuan, mochi	48 GB
flux-dev	24 GB
flux-schnell	12 GB
sdxl	12 GB
sd15, sd1.5	6 GB
lora	2 GB

Models larger than the target's max_vram_mb will be skipped during sync.

Configuration

Default configuration values:

Key	Default	Description
auto_update_enabled	false	Enable automatic updates
check_interval_hours	24	Hours between update checks
cache_ttl_hours	6	Hours to cache version info
verify_downloads	true	Verify file hash after download
backup_before_update	true	Create .bak before replacing
max_concurrent_downloads	2	Max simultaneous downloads

Optional Workflow Nodes

Three utility nodes are included for workflow integration:

• Model Info (ModelSync) - Output model metadata (source URL, VRAM, update status)
• Check Model Update (ModelSync) - Check if a specific model has updates
• Set Model Source (ModelSync) - Associate a model with its source URL

Database

ModelSync uses SQLite for metadata storage. The database is stored at:

ComfyUI/custom_nodes/ComfyUI-ModelSync/modelsync.db

Requirements

• Python 3.10+
• ComfyUI
• huggingface_hub>=0.20.0
• aiohttp>=3.9.0
• SSH and rsync (for multi-GPU sync)

License

MIT License - see LICENSE file for details.

Contributing

Contributions are welcome! Please open an issue or pull request on GitHub.

Support

For issues and feature requests, please use the GitHub issue tracker.