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[Misc] Update lmcache connector with the latest connector apis #19441

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YaoJiayi
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@YaoJiayi YaoJiayi commented Jun 10, 2025

Update lmcache connector with the latest connector apis.

Signed-off-by: YaoJiayi <120040070@link.cuhk.edu.cn>
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Summary of Changes

Hello @YaoJiayi, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request updates the lmcache_connector to integrate with the latest connector API interface. The primary changes involve adding methods required by the new API specification, specifically those related to managing the lifecycle and asynchronous transfer status of finished requests. This ensures the connector can properly interact with components that rely on the updated API.

Highlights

  • API Alignment: Updated the lmcache_connector implementation to conform to the latest version of the connector API.
  • Asynchronous Transfer Completion: Added the get_finished method to allow the scheduler to query for requests whose asynchronous KV transfer operations (save/send) have completed.
  • Request Completion Handling: Implemented the request_finished method, which is called when a request finishes. This method determines if blocks should be held until asynchronous transfer completes and can return additional metadata.
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Code Review

This pull request updates the LMCacheConnectorV1 by implementing the get_finished and request_finished methods, aligning it with the latest connector APIs. The changes involve adding necessary type hints and delegating the method implementations to the underlying _lmcache_engine. The code is clear, and the method signatures and docstrings are consistent with the base class. The changes appear correct and effectively achieve the stated goal.

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@KuntaiDu KuntaiDu left a comment

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LGTM!

@KuntaiDu KuntaiDu enabled auto-merge (squash) June 12, 2025 18:12
@github-actions github-actions bot added the ready ONLY add when PR is ready to merge/full CI is needed label Jun 12, 2025
@KuntaiDu KuntaiDu merged commit cda9230 into vllm-project:main Jun 17, 2025
81 checks passed
yeqcharlotte pushed a commit to yeqcharlotte/vllm that referenced this pull request Jun 22, 2025
minpeter pushed a commit to minpeter/vllm that referenced this pull request Jun 24, 2025
…project#19441)

Signed-off-by: YaoJiayi <120040070@link.cuhk.edu.cn>
Signed-off-by: minpeter <kali2005611@gmail.com>
yangw-dev pushed a commit to yangw-dev/vllm that referenced this pull request Jun 24, 2025
…project#19441)

Signed-off-by: YaoJiayi <120040070@link.cuhk.edu.cn>
Signed-off-by: Yang Wang <elainewy@meta.com>
xjpang pushed a commit to xjpang/vllm that referenced this pull request Jun 30, 2025
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