53 lines
1.3 KiB
Markdown
53 lines
1.3 KiB
Markdown
---
|
|
title: Engine Orchestration
|
|
kind: module
|
|
status: draft
|
|
owners:
|
|
- "@tzhouam"
|
|
- "@yinpeiqi"
|
|
- "@fake0fan"
|
|
- "@Sy0307"
|
|
primary_code_paths:
|
|
- vllm_omni/engine/**
|
|
related_code_paths:
|
|
- vllm_omni/distributed/omni_coordinator/**
|
|
- vllm_omni/distributed/ray_utils/**
|
|
depends_on:
|
|
- vllm_omni_config.md
|
|
- input_output_modality_contracts.md
|
|
- omni_connector.md
|
|
validation_paths:
|
|
- tests/engine/**
|
|
- tests/distributed/omni_coordinator/**
|
|
upstream_refs:
|
|
- vllm.v1.engine
|
|
last_reviewed: 2026-07-16
|
|
---
|
|
|
|
# Engine orchestration
|
|
|
|
Engine orchestration coordinates configured AR and diffusion stages while
|
|
keeping public clients independent from stage processes and transports.
|
|
|
|
## Candidate invariants
|
|
|
|
### ORCH-INV-001: The orchestrator owns cross-stage routing
|
|
|
|
**Rule:** Entrypoints and stage clients MUST NOT independently forward a
|
|
request to a downstream stage.
|
|
|
|
### ORCH-INV-002: Stage clients do not own routing policy
|
|
|
|
**Rule:** Stage clients MUST implement communication and lifecycle operations
|
|
without selecting the next logical stage.
|
|
|
|
### ORCH-INV-003: Terminal state is monotonic
|
|
|
|
**Rule:** Once a request reaches a terminal state, orchestration MUST NOT
|
|
forward new work for that request.
|
|
|
|
## Safe-change guide
|
|
|
|
Test routing, output ordering, cancellation, failure propagation, shutdown, and
|
|
representative multi-stage execution.
|