Principle:Sgl project Sglang Quantized Model Export Validation
| Knowledge Sources | |
|---|---|
| Domains | Quantization, Validation, Model_Optimization |
| Last Updated | 2026-02-10 00:00 GMT |
Overview
A file system validation pattern that verifies the completeness and correctness of exported quantized model artifacts before deployment.
Description
After model quantization and export, the resulting directory must contain specific files to be loadable by SGLang: a config.json (model architecture), tokenizer.json and related tokenizer files, and .safetensors weight files. Export validation checks for the presence of these files and optionally verifies that the config.json contains the expected quantization metadata. This prevents deploying incomplete or corrupted quantized models.
Usage
Validate exported models after any quantization workflow and before attempting to deploy them with SGLang Engine or Server. This is a safety step that catches export failures early.
Theoretical Basis
The validation follows a file presence checklist pattern:
Required artifacts:
- config.json — Model architecture and quantization config
- tokenizer.json (or tokenizer.model) — Tokenizer definition
- *.safetensors — Quantized weight files (one or more shards)
Optional checks:
- Verify config.json contains quantization metadata
- Check that safetensors file sizes are reasonable
- Validate tokenizer can be loaded