Add metrics for mooncake operations#35
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Code Review
This pull request introduces comprehensive metrics tracking for the Mooncake store connector, including instrumentation for save, load, and lookup operations across both worker and connector components. A potential issue was identified in the KVCacheStoreRecvingThread where metrics variables are incorrectly scoped, leading to inaccurate error reporting if an exception occurs during batch processing. I recommend refactoring the loop to ensure batch_bytes and load_get_start are correctly initialized per iteration.
Adds per-operation telemetry (save_exists, save_put, load_get, lookup_exists) to the store-pool variant of the Mooncake KV connector. Each call records duration, key count, byte count, status (ok/partial_failure/error), and failed-key count into a new MooncakeStoreConnectorStats serialized to the engine logger, plus a MooncakeStorePromMetrics histogram+counters exposed via Prometheus, labelled by (operation, status). This closes the TODO at vllm/distributed/kv_transfer/kv_connector/v1/mooncake/stats.py:15 for the store connector, mirroring ivanium#35. Co-authored-by: Claude <noreply@anthropic.com> Signed-off-by: Dao Le <daole@inferact.ai> Signed-off-by: Dao Le <Dao007forever@gmail.com>
Adds per-operation telemetry (save_exists, save_put, load_get, lookup_exists) to the store-pool variant of the Mooncake KV connector. Each call records duration, key count, byte count, status (ok/partial_failure/error), and failed-key count into a new MooncakeStoreConnectorStats serialized to the engine logger, plus a MooncakeStorePromMetrics histogram+counters exposed via Prometheus, labelled by (operation, status). This closes the TODO at vllm/distributed/kv_transfer/kv_connector/v1/mooncake/stats.py:15 for the store connector, mirroring ivanium#35. Co-authored-by: Claude <noreply@anthropic.com> Signed-off-by: Dao Le <daole@inferact.ai> Signed-off-by: Dao Le <Dao007forever@gmail.com>
Add metrics