Perlmutter Utilization — local Parquet clone

Generated from a local clone of IRIS usage_2026 stored at /pscratch/sd/w/wbhimji/nersc-usage/jobs/. Range: 2026-01-21 → 2026-05-14 (NERSC AY2026 to date).

Plots

Stacked utilization v2 — **util-2026-stacked-v2.png** — stacked by `allocation_type`, filtered to the DOE pool, fixed denominator 1792 nodes × 24 h. Closest match to the official NERSC report (mean 82.7%).

Stacked utilization v1 — **util-2026-stacked.png** — same stack, but capacity = per-day `MAX(ZoneSize)` (~1664). Mean 89.0%.

Single-bar utilization — **util-2026.png** — single total bar, no allocation-type breakdown.

Scripts

pull.py — paged IRIS pull → Parquet partitions; day, range, refresh.
plot_util_stacked.py — stacked bars by allocation type (this is the one to use).
plot_util.py — single-bar utilization plot.
duck_util.py — one-day utilization computation (parity check vs the IRIS skill).

Updated by hand. Re-run the plot scripts or copy fresh PNGs here as the clone updates.