Gahow Wang
445e491123
third_party/vllm/ now tracked in git for direct patch management.
Based on vLLM v0.18.1 release with one patch applied:
vllm/v1/core/sched/scheduler.py:
Replace fatal assert with graceful skip when KV transfer callback
arrives for an already-aborted request during PD disaggregated serving.
Future vLLM modifications should be made directly in third_party/vllm/
and committed normally. The patches/ directory is kept as documentation
of what changed from upstream.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
3.1 KiB
MooncakeConnector Usage Guide
About Mooncake
Mooncake aims to enhance the inference efficiency of large language models (LLMs), especially in slow object storage environments, by constructing a multi-level caching pool on high-speed interconnected DRAM/SSD resources. Compared to traditional caching systems, Mooncake utilizes (GPUDirect) RDMA technology to transfer data directly in a zero-copy manner, while maximizing the use of multi-NIC resources on a single machine.
For more details about Mooncake, please refer to Mooncake project and Mooncake documents.
Prerequisites
Installation
Install mooncake through pip: uv pip install mooncake-transfer-engine.
Refer to Mooncake official repository for more installation instructions
Usage
Prefiller Node (192.168.0.2)
vllm serve Qwen/Qwen2.5-7B-Instruct --port 8010 --kv-transfer-config '{"kv_connector":"MooncakeConnector","kv_role":"kv_producer"}'
Decoder Node (192.168.0.3)
vllm serve Qwen/Qwen2.5-7B-Instruct --port 8020 --kv-transfer-config '{"kv_connector":"MooncakeConnector","kv_role":"kv_consumer"}'
Proxy
python examples/online_serving/disaggregated_serving/mooncake_connector/mooncake_connector_proxy.py --prefill http://192.168.0.2:8010 --decode http://192.168.0.3:8020
Now you can send requests to the proxy server through port 8000.
Environment Variables
-
VLLM_MOONCAKE_BOOTSTRAP_PORT: Port for Mooncake bootstrap server- Default: 8998
- Required only for prefiller instances
- For headless instances, must be the same as the master instance
- Each instance needs a unique port on its host; using the same port number across different hosts is fine
-
VLLM_MOONCAKE_ABORT_REQUEST_TIMEOUT: Timeout (in seconds) for automatically releasing the prefiller’s KV cache for a particular request. (Optional)- Default: 480
- If a request is aborted and the decoder has not yet notified the prefiller, the prefill instance will release its KV-cache blocks after this timeout to avoid holding them indefinitely.
KV Transfer Config
KV Role Options
- kv_producer: For prefiller instances that generate KV caches
- kv_consumer: For decoder instances that consume KV caches from prefiller
- kv_both: Enables symmetric functionality where the connector can act as both producer and consumer. This provides flexibility for experimental setups and scenarios where the role distinction is not predetermined.
kv_connector_extra_config
- num_workers: Size of thread pool for one prefiller worker to transfer KV caches by mooncake. (default 10)
- mooncake_protocol: Mooncake connector protocol. (default "rdma")
Example Scripts/Code
Refer to these example scripts in the vLLM repository: