Gahow Wang 255c8e6884 Hybrid routing: LMetric for LB + explicit affinity for high-cache sessions ...

Replace the full unified cost model with a simpler hybrid:
- If session has >50% cache on affinity instance AND instance not overloaded
  (num_requests <= avg * overload_factor) → stick to affinity
- Otherwise → use LMetric (P × BS) for best load balance

This combines LMetric's superior load balance with explicit session
affinity for high-value sessions that have significant cache accumulation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-05-25 09:05:08 +08:00

analysis

Add comprehensive research findings document

2026-05-23 07:16:31 +08:00

docs

Update design doc: final results + review findings

2026-05-25 03:48:18 +08:00

experiments

Add elastic PS evaluation plan for production-realistic trace

2026-05-23 15:56:05 +08:00

patches

Add vLLM patches directory for version-controlled patch management

2026-05-22 00:26:14 +08:00

replayer

Fix multi-turn replay fidelity: track realized output tokens across all components

2026-05-24 14:47:51 +08:00

scripts

Hybrid routing: LMetric for LB + explicit affinity for high-cache sessions

2026-05-25 09:05:08 +08:00

tests

proxy: Settings dataclass + cache-ratio gate + P-pick offload penalty (B4, M2, M3, D5)

2026-05-23 21:11:17 +08:00

third_party/vllm

Evict migrated blocks from prefix cache after KV send completes

2026-05-24 16:56:34 +08:00

.gitignore

Phase 1 milestone: system-level analysis + reproducible report

2026-05-22 16:17:41 +08:00

FIXES.md

Add FIXES.md with prioritized repo cleanup checklist

2026-05-23 20:35:56 +08:00

pyproject.toml

tests: add minimal coverage for percentile + proxy routing (S1)

2026-05-23 21:07:14 +08:00

REPORT.md

Fix A+C: real cache sync + cached-prefill-on-C architecture

2026-05-24 11:22:38 +08:00

TODO.md

LMetric routing policy (OSDI'26) + A/B results vs linear baseline

2026-05-22 16:57:32 +08:00

uv.lock

Fix NONE_HASH import: use module ref instead of from-import (value binding bug)

2026-05-24 01:32:19 +08:00

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