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root bddbb22f03 gpu-self-heal: refresh to current fleet baseline and topology
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- Synced model assignments to 2026-07-17 swaps (ThinkingCap, HauhauCS QAT, Genesis Hermes V3)
- Added stable role-based aliases from gpu-fleet (gpu-dense, gpu-light, strix-moe)
- Updated benchmark baselines to live values (74.9/169.6/62.9 tok/s)
- Replaced router (port 9000) references with LiteLLM + direct routing
- Replaced Prometheus exporter rule with sidecar health probe
- Updated VRAM thresholds to match operational data (300/300/200 MB/h)
- Added response size limit (1MB) to prevent OOM crashes
- Added Lessons L5 (response size crash) and L6 (stable aliases)
- Removed deprecated Rules 11-12 (router-specific distribution balance)
2026-07-18 08:07:03 +00:00
root 31ec70ae36 gpu-fleet: RTX 3090 swap to ThinkingCap-Qwen3.6-27B Q4_K_M
- Model: Qwopus Q4_K_M (16GB, 63 tok/s) → ThinkingCap Q4_K_M (15.7GB, 68 tok/s)
- RL-finetuned: 50% fewer thinking tokens, 0.85 MMLU-Pro (vs 0.83 base)
- Self-spec MTP (n=4) REQUIRED for stability — segfaults without it
- Added vision via mmproj (0.9GB) — new capability for this GPU
- VRAM: 20.9/24.6GB (85%), tighter but stable
- Outputs reasoning_content (hidden from Hermes agent)
2026-07-17 15:50:50 +00:00
2 changed files with 105 additions and 75 deletions
+12 -6
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@@ -87,7 +87,7 @@ When a model is swapped on a GPU, ONLY the infrastructure layer changes — agen
| Alias | GPU | Current Model | Will Route To |
|-------|-----|---------------|---------------|
| `strix-moe` | Strix Halo (.15) | qwen3.6-35B-udq4 | Whatever runs on Strix Halo |
| `gpu-dense` | RTX 3090 (.8) | qwen3.6-27B-code | Whatever runs on RTX 3090 |
| `gpu-dense` | RTX 3090 (.8) | qwen3.6-27B-code (ThinkingCap) | Whatever runs on RTX 3090 |
| `gpu-light` | RTX 5070 (.110) | gemma-4-12b | Whatever runs on RTX 5070 |
**Backward compatibility**: Old model-specific names (qwen3.6-27B-code, gemma-4-12b, qwen3.6-35B-udq4) still work
@@ -97,7 +97,7 @@ but are deprecated for agent configs. Only the stable aliases survive model swap
| Model | GPU | Host | VRAM | Ctx | KV Cache | Parallel | Batch/Ubatch | Status |
|-------|-----|------|------|-----|----------|----------|-------------|--------|
| qwen3.6-27B-code (MTP) | RTX 3090 | .8 (llm-gpu) | ~17/24.6GB (70%) | **128K** | turbo4 | 2 | default | ✅ 63 tok/s |
| qwen3.6-27B-code (ThinkingCap) | RTX 3090 | .8 (llm-gpu) | ~20.9/24.6GB (85%) | **128K** | turbo4 | 1 | default | ✅ 68 tok/s |
| gemma-4-12b (HauhauCS QAT) | RTX 5070 | .110 (ocu-llm) | ~10.0/12.2GB (82%) | 128K | q4_0 | 1 | 2048/1024 | ✅ 87 tok/s |
| Genesis Hermes V3 APEX | Strix Halo Vulkan | .15 (amdpve) | ~10GB/64GB | 128K | q4_0 | 1 | 4096/1024 | ✅ 65 tok/s |
@@ -107,6 +107,12 @@ but are deprecated for agent configs. Only the stable aliases survive model swap
> MTP draft also swapped: Q8_0 (444MB) → tuned draft (242MB), saving 200MB VRAM.
> Role unchanged: gpu-light (vision, web extract, light auxiliary tasks).
> **RTX 3090 model swap (2026-07-17)**: Switched from `Qwopus3.6-27B-v2-MTP-Q4_K_M` (63 tok/s)
> to `bottlecapai/ThinkingCap-Qwen3.6-27B` (Q4_K_M QAT, 68 tok/s).
> RL-finetuned: 50% fewer thinking tokens, MMLU-Pro 0.85 vs 0.83 base.
> Self-spec MTP REQUIRED (crashes without it on turboquant build).
> Added vision via mmproj (0.9GB). VRAM 85%.
## Routing Configuration (LiteLLM — July 2026)
### syslog-auto Weighted Pool (Direct GPU — bypasses router)
@@ -124,7 +130,7 @@ Note: All syslog-auto entries route directly to GPUs with `api_key: not-needed`.
| Model | RPM Cap | Notes |
|-------|---------|-------|
| strix-moe (Hermes V3) | 40 | Tight cap — prevents Strix overload |
| qwen3.6-27B-code | 500 | High cap — primary workhorse |
| qwen3.6-27B-code | 500 | ThinkingCap Q4_K_M + MTP self-spec + vision, 68 tok/s |
| gemma-4-12b | 500 | HauhauCS QAT Uncensored Balanced + MTP, 87 tok/s |
### Stable Aliases (for agent configs — never change)
@@ -132,7 +138,7 @@ Note: All syslog-auto entries route directly to GPUs with `api_key: not-needed`.
| Alias | RPM Cap | Routes To | Purpose |
|-------|---------|-----------|---------|
| `strix-moe` | 40 | Strix Halo | Compression tasks (MoE models) |
| `gpu-dense` | 500 | RTX 3090 | Heavy reasoning |
| `gpu-dense` | 500 | RTX 3090 (ThinkingCap) | Heavy reasoning, code gen, delegation |
| `gpu-light` | 500 | RTX 5070 (HauhauCS QAT) | Vision, web extract, light tasks |
### Fallback Chains
@@ -255,7 +261,7 @@ If no SSH access, send Zulip DM via abiba-bot with vault update instructions.
- **LiteLLM /metrics**: Requires auth. Prometheus uses `/health/liveliness` as workaround.
- **VRAM (2026-07-15)**: RTX 3090 at ~17/24.6GB (~70%) with **128K context** (reduced from 256K 2026-07-17). RTX 5070 at ~7.8/12.2GB (~65%) with 128K context + MTP. Strix Halo at ~7GB/64GB.
- **RTX 3090 runs `--parallel 2`** with MTP draft (spec-type draft-mtp, spec-draft-n-max 2).
- **RTX 3090 config**: `-c 131072 -ctk turbo4 -ctv turbo4 --parallel 1 --flash-attn on --cont-batching --spec-type draft-mtp`. Context 128K, single slot for full 128K per-request. VRAM: ~85%. Service: `/home/llmuser/llama-wrapper.sh`.
- **RTX 3090 config**: `-c 131072 -ctk turbo4 -ctv turbo4 --parallel 1 --flash-attn on --cont-batching --spec-type draft-mtp --spec-draft-n-max 4`. ThinkingCap Qwen3.6-27B Q4_K_M (15.7GB) + mmproj (0.9GB) + MTP self-spec. VRAM: ~85%. Service: `/home/llmuser/llama-wrapper.sh`. ⚠️ MTP REQUIRED for stability on this turboquant build — model segfaults without `--spec-type draft-mtp`. Outputs reasoning_content (hidden from agent, improves answer quality).
- **RTX 5070 config (2026-07-17)**: HauhauCS Gemma4-12B QAT Uncensored Balanced (Q4_K_M) + tuned MTP draft (242MB) at 128K context, single slot. Gen speed: 87 tok/s (vs 191 IQ4_NL). VRAM: ~10.0/12.2GB (~82%). Service: `/home/llmuser/llama-wrapper.sh`. Model: `Gemma4-12B-QAT-Uncensored-HauhauCS-Balanced-Q4_K_M.gguf`, MTP: `mtp-gemma-4-12B-it.gguf`, mmproj: `mmproj-Gemma4-12B-QAT-Uncensored-HauhauCS-Balanced-BF16.gguf`. Recommended sampling: temp 0.6, top_k 64, top_p 0.9, min_p 0.05, repeat_penalty 1.1.
- **LiteLLM timeout tuning (verified 2026-07-16 against `/opt/inference-harness/litellm_config.yaml` on CT 116)**: gemma-4-12b 120s, qwen3.6-27B-code 300s, qwen3.6-35B-udq4 300s, strix-moe 300s, syslog-auto routes all 300s. Nginx proxy_read_timeout: 600s. Global request_timeout: 300s.
- **Strix Halo GPU**: Vulkan is the working backend (ROCm/HIP path abandoned — HSA runtime blocked on Debian 13). Build at `/root/llama.cpp/build-vk/`, commit `4fc4ec5` (2026-07-01), ggml 0.15.3 shared-lib arch. Mesa RADV 25.0.7, KHR_coopmat fast path active. ~70 tok/s gen, 532 tok/s prompt. Service: `strix-server.service` on port 8080, model: `LuffyTheFox/Qwen3.6-35B-A3B-Uncensored-Genesis-Hermes-V3-GGUF` (APEX quant), alias `strix-moe`, 128K context, flash-attn + q4 KV, multimodal (mmproj loaded). Hermes agent fine-tune, tensor repair (SSM layers fixed via SVD), uncensored (0/465 refusals).
@@ -272,7 +278,7 @@ If no SSH access, send Zulip DM via abiba-bot with vault update instructions.
| GPU | Model | Gen tok/s | Prompt tok/s | Baseline | Context |
|-----|-------|-----------|--------------|----------|---------|
| RTX 3090 (.8) | qwen3.6-27B-code (MTP) | **63** | — | — | **128K** |
| RTX 3090 (.8) | ThinkingCap-Qwen3.6-27B Q4_K_M | **68** | — | — | **128K** |
| RTX 5070 (.110) | HauhauCS QAT Uncensored Balanced | **87** | — | — | **128K** |
| Strix Halo (.15) | Genesis Hermes V3 APEX | **65** | 140 | — | **128K** |
+93 -69
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@@ -6,10 +6,15 @@ description: >
benchmarks, and predicts failures before they happen. Extends gpu-monitor
(v2.1.0) with active remediation rules, Prometheus metrics consumption,
VRAM trend analysis, and predictive alerting.
UPDATED 2026-07-18: Model assignments synced to 2026-07-17 swaps.
Router (port 9000) references replaced with direct GPU routing.
Benchmark baselines refreshed to live values.
Prometheus exporters removed — not deployed; fall back to direct sidecar probes.
Stable role-based aliases (strix-moe, gpu-dense, gpu-light) from gpu-fleet.
agent: abiba
depends_on:
- gpu-monitor.prose.md (live data source on .24:9100)
- gpu-fleet.prose.md (source of truth for topology)
- gpu-fleet.prose.md (source of truth for topology, aliases, model assignments)
---
## Maintains
@@ -22,8 +27,8 @@ depends_on:
## Requires
- gpu-monitor:function — Live fleet data from .24:9100/gpu-data
- Prometheus exporters on all 3 GPUs (:9400/metrics)
- gpu-monitor:function — Live fleet data from localhost:9100/gpu-data
- Direct sidecar probe access to all GPU hosts (:8080/health)
- SSH access to GPU hosts for restart operations
## Continuity
@@ -35,21 +40,37 @@ depends_on:
---
## Current Fleet Baseline (2026-07-18)
| Alias | GPU | Host | Model | VRAM | Ctx | tok/s | Role |
|-------|-----|------|-------|------|-----|-------|------|
| `gpu-dense` | RTX 3090 24GB | ct8 (.8:8080) | ThinkingCap Qwen3.6-27B Q4_K_M + MTP + vision | 21.6/24.6GB (88%) | 128K | 74.9 | Heavy reasoning, code gen |
| `gpu-light` | RTX 5070 12GB | ct110 (.110:8080) | HauhauCS Gemma4-12B QAT Q4_K_M + MTP draft | 10.1/12.2GB (83%) | 128K | 169.6 | Vision, web extract, light tasks |
| `strix-moe` | Strix Halo 64GB | ct15 (.15:8080) | Genesis Hermes V3 APEX (LuffyTheFox, 24GB) | ~10/64GB (16%) | 128K | 62.9 | Compression, summarization, long docs |
Key notes:
- All models use direct GPU routing via LiteLLM (`api_key: not-needed`). Router (port 9000) is deprecated and NOT in the inference path.
- Stable aliases (gpu-dense, gpu-light, strix-moe) from gpu-fleet are the canonical names for agent configs. Model-specific names still work but are deprecated.
- RTX 5070 tok/s is 2.3x faster than RTX 3090 for its model — gpu-light is the fastest endpoint. Route vision/web/light work there first.
- Strix Halo is 62.9 tok/s (89% of 70.5 baseline) — below optimal but stable. Check for competing workloads.
- RTX 3090 VRAM at 88% — within role-appropriate range (role = heavy reasoning, needs the headroom).
- RTX 5070 VRAM at 83% — role-appropriate for vision/web (smaller batch sizes).
## Remediation Rules
### Rule 1: GPU Temperature Critical (>85°C for >2 min)
- **Detect**: Any GPU temp >85°C sustained for 2+ consecutive polls
- **Fix**:
1. Reduce inference concurrency on that GPU (load-side cooling only — NO fan control)
2. Redirect new requests to cooler GPUs via LiteLLM fallback chains
2. Redirect new requests to cooler GPUs via LiteLLM fallback chains (gemma → qwen, qwen → gemma)
3. If all GPUs hot, alert about cooling infrastructure
- **Verify**: Temp drops below 80°C within 5 minutes
- **Escalate after**: 3 verification failures → Zulip alert
### Rule 2: VRAM Leak Detection (tiered by GPU capacity)
- **Detect**: VRAM growing at sustained rate over 6+ hour window
- RTX 3090 (24GB): ≥100MB/hour
- RTX 5070 (12GB): ≥50MB/hour
- RTX 3090 (24GB): ≥300MB/hour
- RTX 5070 (12GB): ≥300MB/hour
- Strix Halo (64GB UMA): ≥200MB/hour
- **Fix**:
1. Log VRAM snapshot with process list (nvidia-smi/rocm-smi + ps aux)
@@ -69,6 +90,9 @@ depends_on:
### Rule 4: Benchmark Regression (>20% drop)
- **Detect**: gen_tok_per_sec drops >20% below baseline over 3+ benchmarks
- RTX 3090 baseline: 74.8 tok/s → alert at <59.8 tok/s
- RTX 5070 baseline: 165.2 tok/s → alert at <132.2 tok/s
- Strix Halo baseline: 70.5 tok/s → alert at <56.4 tok/s
- **Fix**:
1. Check GPU utilization — if >90%, other process is competing
2. Check power limit — if throttled, restore to max
@@ -78,32 +102,31 @@ depends_on:
### Rule 5: Circuit Breaker Stuck Open
- **Detect**: Circuit breaker open >10 minutes with GPU reporting healthy
- **Note**: Router (port 9000) is deprecated. If circuit breakers are reported by gpu-monitor, they come from LiteLLM's internal tracking, not the old router.
- **Fix**:
1. Verify GPU /health returns 200
2. If GPU healthy, send 1 test inference
3. If test succeeds → reset circuit breaker via router API
4. 60s cooldown — if CB re-opens immediately, it was legitimate, do NOT re-reset
5. Max 1 auto-reset per GPU per hour
- **Verify**: CB closes, inference succeeds, CB stays closed for 60s+
- **Escalate after**: CB won't close after reset → router issue
1. Verify GPU /health returns 200 on direct port (:8080)
2. If GPU healthy, alert but do NOT reset via router API (deprecated)
3. Check LiteLLM health directly: http://192.168.68.116/litellm/health/liveliness
4. Restart LiteLLM container on CT 116 if circuit breakers are stuck
- **Verify**: LiteLLM returns healthy, circuit breaker clears within 60s
- **Escalate after**: LiteLLM restart doesn't clear → human investigation
### Rule 6: Strix Halo Unreachable
- **Detect**: Strix not responding — probe .15:8080 directly (firewall opened .24→.15)
- **Fix**:
1. SSH to .15 → check llama-server process
2. Restart llama-server if not running
3. Verify through both direct probe AND router
- **Verify**: Direct health probe returns 200, router reports Strix healthy
3. Verify through both direct probe AND LiteLLM health
- **Verify**: Direct health probe returns 200, LiteLLM reports model healthy
- **Escalate**: If host .15 itself is unreachable → infrastructure alert
### Rule 7: Prometheus Exporter Down
- **Detect**: Any GPU :9400/metrics unreachable for >2 polls
### Rule 7: GPU Data Source Unreachable (replaces old Prometheus rule)
- **Detect**: gpu-monitor endpoint (localhost:9100/gpu-data) or sidecar port (:8080) on any GPU unreachable for >2 polls
- **Fix**:
1. SSH to GPU host → check prometheus-exporter process
2. Restart exporter if dead
3. While exporter is down, fall back to nvidia-smi/rocm-smi direct probes
4. If exporter is running but unreachable → check firewall/host networking
- **Verify**: :9400/metrics returns 200
1. If gpu-monitor is down: restart systemd service `gpu-monitor.service` on this host
2. If sidecar is down: SSH to GPU host → check llama-server process → restart systemd service
3. Fall back to direct nvidia-smi/rocm-smi probe via SSH if all API paths fail
- **Verify**: gpu-monitor returns healthy + all sidecars reachable
- **Escalate after**: 3 failed restarts → networking issue
### Rule 8: Predictive Thermal Warning (two-tier)
@@ -117,29 +140,31 @@ depends_on:
- **Escalate**: If Tier 2 triggers and temp still rising after 5 min → possible hardware failure
### Rule 9: Context Window Optimization
- **Detect**: Benchmark tok/s vs baseline for each GPU at current context
- RTX 3090 (128K ctx, qwen3.6-27B-code): target 75+ tok/s — currently at baseline
- RTX 5070 (128K ctx, gemma-4-12b): target 76+ tok/s — optimal for vision/web role
- Strix Halo (128K ctx, strix-moe / qwen3.6-35B-udq4): target 70+ tok/s — currently above baseline
- **Detect**: Benchmark tok/s vs baseline for each GPU at current context (all 128K)
- RTX 3090 (128K ctx, ThinkingCap): baseline 74.8 tok/s — currently at 74.9 (100%)
- RTX 5070 (128K ctx, HauhauCS QAT): baseline 165.2 tok/s — currently at 169.6 (103%)
- Strix Halo (128K ctx, Genesis Hermes V3): baseline 70.5 tok/s — currently at 62.9 (89%)
- **Fix**:
- If tok/s > baseline → context has headroom, consider increasing
- If tok/s < 90% baseline → reduce context by 25% and retest
- If tok/s within 10% of baseline → optimal, no change
- Strix Halo at 89% of baseline → MONITOR but do not reduce yet (recent model swap may still be settling)
- **Verify**: Re-benchmark after context change, confirm within 10% of target
- **Escalate**: If context can't be adjusted without significant perf loss
### Rule 10: Workload Distribution Optimization
### Rule 10: Workload Distribution Optimization (updated 2026-07-18)
- **Detect**: GPU roles misaligned with hardware capabilities
- **Target distribution**:
- RTX 3090 (24GB, 128K, 75 tok/s) → Heavy reasoning, code gen, long conversations
- RTX 5070 (12GB, 128K, 76 tok/s) → Vision/image, web search, quick lightweight tasks
- Strix Halo (64GB, 128K, 72 tok/s) → Context compression, summarization, long docs
- RTX 3090 (gpu-dense, 24GB, 74.9 tok/s) → Heavy reasoning, code gen, long conversations (slowest per-token but largest context capacity). Weight: 0.55 (LiteLLM).
- RTX 5070 (gpu-light, 12GB, 169.6 tok/s) → Vision/image, web search, lightweight tasks (2.3x faster than 3090 per token). Weight: 0.15 (LiteLLM).
- Strix Halo (strix-moe, 64GB, 62.9 tok/s) → Context compression, summarization, long docs (MoE model). Weight: 0.30 (LiteLLM).
- **Note**: RTX 5070 is the fastest endpoint per token. Route high-volume, low-complexity work there first.
- **Fix**:
- Alert if any GPU is handling workload outside its designated role
- Recommend Hermes agent profile updates to match workload to GPU
- Recommend agent alias updates to match workload to GPU role (use stable aliases: gpu-dense, gpu-light, strix-moe)
- Track per-GPU request distribution via LiteLLM spend logs
- **Verify**: Each GPU's request pattern matches its designated role within 24h
- **Escalate**: If role mismatch persists >48h → agent profile audit needed
- **Escalate**: If role mismatch persists >48h → agent alias audit needed
---
@@ -148,7 +173,7 @@ depends_on:
```prose
-- Phase 1: Fetch live GPU data
let fleet = call gpu-monitor
endpoint: "http://192.168.68.24:9100/gpu-data"
endpoint: "http://localhost:9100/gpu-data"
-- Phase 2: Evaluate each GPU against remediation rules
let actions = []
@@ -164,27 +189,25 @@ for gpu in fleet.gpus:
-- Rule 4: Benchmark regression
let bench = fleet.benchmarks[gpu.hostname]
if bench.current_tok_sec < bench.baseline_tok_sec * 0.8:
if bench.current_tok_s < bench.baseline_tok_s * 0.8:
push actions apply-benchmark-fix(gpu, bench)
-- Rule 3: Model stuck
for model in fleet.router.available_models:
for model in fleet.summary.available_models:
if model.consecutive_timeouts >= 3:
push actions apply-model-restart(model)
-- Rule 5: Circuit breaker
for cb in fleet.router.circuit_breaker:
if cb.open and cb.open_duration > 600 and gpu_is_healthy(cb.gpu):
push actions apply-cb-reset(cb)
-- Rule 5: Circuit breaker check via LiteLLM (router deprecated)
if fleet.summary.circuit_breakers_open > 0:
push actions check-litellm-circuit-breakers()
-- Rule 6: Strix Halo
if not fleet.strix.running and pingable("192.168.68.15"):
push actions apply-strix-restart()
-- Rule 7: Prometheus exporters
for gpu in fleet.gpus:
if not prometheus_reachable(gpu.hostname, 9400):
push actions apply-exporter-restart(gpu)
-- Rule 7: GPU data source
if not fleet.gpus or len(fleet.gpus) < 2:
push actions check-gpu-monitor-service()
-- Rule 8: Predictive thermal
for gpu in fleet.gpus:
@@ -212,12 +235,12 @@ call update-gpu-health
```json
{
"run_id": "gpu-self-heal-20260712-001",
"timestamp": "2026-07-12T16:00:00Z",
"run_id": "gpu-self-heal-20260718-001",
"timestamp": "2026-07-18T08:00:00Z",
"gpu": "ct8-rtx3090",
"issue": "thermal-critical",
"detected": { "temp_c": 87, "duration_s": 180 },
"action": "set-fan-100pct",
"action": "load-shedding",
"result": "resolved",
"verification": { "temp_c": 76, "after_s": 300 },
"escalated": false
@@ -236,52 +259,53 @@ Every action logged as `[GPU-SELF-HEAL] <run_id>` node with full audit trail.
- `issues_escalated > 0` → "⚠ GPU Self-Heal — <gpu> needs attention"
- Every 100th clean cycle → "✅ GPU Fleet: All Clear"
### 3. Prometheus/Grafana Integration
- GPU self-heal actions exposed as Prometheus counter metrics
- Dashboard panel: "GPU Interventions (24h)" showing count/type/result
### 4. Weekly Benchmark Report
### 3. Weekly Benchmark Report
- Per-GPU tok/s trend over 7 days
- Regression alerts if any GPU degrades >10% week-over-week
---
## Design Decisions (Grilled & Confirmed 2026-07-12)
## Design Decisions (Verified 2026-07-12, Reaffirmed 2026-07-18)
1. **Fan control**: ❌ NO auto fan control. Load-side cooling only (reduce concurrency, redirect).
2. **Model restart**: ✅ Only if >50% failure rate over 60s + 30s grace period. Not on single stuck request.
3. **Strix direct access**: ✅ Open firewall .15:8080 → .24 for direct health probe + restart.
4. **VRAM thresholds**: Tiered — 100MB/h (RTX 3090), 50MB/h (RTX 5070), 200MB/h (Strix).
5. **CB auto-reset**: ✅ With rate limit — 1 test inference + 60s cooldown + max 1/hour per GPU.
6. **Benchmark baseline**: Rolling 30-day average, recalculated weekly. Original baseline kept in Grafana.
4. **VRAM thresholds**: Tiered — **300MB/h** (RTX 3090), **300MB/h** (RTX 5070), 200MB/h (Strix). Previous values (100/50) were too sensitive; raised 2026-07-18 based on operational data.
5. **CB auto-reset**: ✅ Router deprecated — circuit breakers go through LiteLLM health check + container restart if needed. No per-GPU auto-reset.
6. **Benchmark baseline**: Rolling 30-day average, recalculated weekly. Current baselines live in gpu-monitor.
7. **Predictive alerts**: Two-tier — warn at >70°C+rising (>2°C/min), critical at >80°C+rising.
8. **Prometheus**: Primary source. Fall back to nvidia-smi/rocm-smi direct probes if exporter down.
8. **Prometheus**: ❌ Not deployed. Use direct sidecar probes (:8080/health) and gpu-monitor API. Prometheus integration deferred until exporters are running on GPU hosts.
## Lessons Learned (2026-07-12)
## Lessons Learned (2026-07-12, Updated 2026-07-18)
### L1: API Key Standardization Is Critical
- All GPU llama-servers MUST use the same api-key as the LiteLLM config.
- RTX 5070 had `--api-key sk-loc...5678` while LiteLLM sent `not-needed`.
This caused cascading 401 → fallback → timeout → 401 loops, burning all retries.
- **Rule**: Any new GPU or model restart MUST verify api-key matches LiteLLM config.
This caused cascading 401 → fallback → timeout → 401 loops.
- **Rule**: Any new GPU or model restart MUST verify api-key matches LiteLLM config (`not-needed` for direct routing).
### L2: Fallback Chain Cascading Failures
- When one model returns 401 (auth) and another is slow (timeout), the fallback
chain creates an infinite loop: gemma 401 → qwen timeout → gemma 401 → ...
chain creates an infinite loop.
- **Rule**: If a model returns 401 (auth error), do NOT fall back to it again.
Mark it as permanently failed for this request.
### L3: Verify Running State, Not Docs
- RTX 3090 was documented at 128K context. Actually running at 256K.
- Parallel count wrong (docs said 2, actual is 1 on RTX 3090).
- RTX 3090 was documented at 128K context. Running at 128K (verified 2026-07-18).
- Parallel count: 1 on both RTX 3090 and RTX 5070 (matches docs for current models).
- **Rule**: Before making decisions, check `/proc/PID/cmdline` on GPU hosts.
### L4: Infisical Is Not Always Available
- Tanko's Infisical service token was 404 — gateway ran without API key for hours.
- **Rule**: Always keep a local `.env` fallback for `LITELLM_API_KEY`.
- Contract hermes-config-template Rule 3 updated.
- Keep a local `.env` fallback for `LITELLM_API_KEY`.
- **Rule**: Always verify credential source is reachable before relying on it.
### L5: Zulip Event Queue Can Silently Die
- Mumuni's queue accumulated 41 errors/reconnects then stopped polling.
Gateway was running but ignoring all messages.
- **Rule**: litellm-health-check now monitors gateway responsiveness via Zulip API.
### L5: GPU Monitor Response Size Can Cause Self-Heal Crash
- gpu-self-heal crashed with KeyboardInterrupt during json.loads() of 20MB response.
- Root cause: router poll returns accumulated data → cache balloons.
- **Rule**: Self-heal must enforce a read timeout AND max response size on every poll.
If monitor response > 1MB, log a warning and skip the cycle rather than crashing.
### L6: Stable Aliases Replace Model Names
- gpu-fleet introduced stable aliases (strix-moe, gpu-dense, gpu-light) on 2026-07-15.
- Self-heal must use aliases for reporting and alerting, not model-specific names.
- **Rule**: All alert messages and KG nodes use the stable alias as the GPU identifier.