Reorganize: llm/old -> old (retired PP/NPU-era scripts, reference only)

old/scripts/prune-rpc-cache.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+# Bound the ggml-rpc worker tensor cache.
+#
+# The worker (frank-pp-worker on Dankserver) keys cache entries per
+# session, so each model load writes a fresh full copy (~15 GB). Left
+# unbounded, the directory filled the root disk to 100% on 2026-08-17;
+# failed cache writes left 0-byte entries, and a later reload served
+# corrupt weights -> degenerate model output (see the cache incident in
+# docs/Pipeline Parallelism/Qwen3.8 PP Deployment.md).
+#
+# This script prunes the cache to a byte cap, oldest files first. Cache
+# entries are derived data: safe to delete. Run from cron on Dankserver.
+set -euo pipefail
+
+CACHE_DIR=/home/dank/.cache/llama.cpp/rpc
+MAX_BYTES=$((40 * 1024 * 1024 * 1024))   # 40 GiB
+
+if [[ ! -d "$CACHE_DIR" ]]; then
+    exit 0
+fi
+
+total=$(du -sb "$CACHE_DIR" | cut -f1)
+if (( total <= MAX_BYTES )); then
+    exit 0
+fi
+
+while (( total > MAX_BYTES )); do
+    oldest=$(ls -1t "$CACHE_DIR" | tail -1)
+    if [[ -z "$oldest" ]]; then
+        break
+    fi
+    rm -f -- "$CACHE_DIR/$oldest"
+    total=$(du -sb "$CACHE_DIR" | cut -f1)
+done
+
+echo "prune-rpc-cache: pruned to $(du -sh "$CACHE_DIR" | cut -f1)"