Engineering Notes & Telemetry

Technical documentation, storage benchmarks, and low-latency networking notes.

Optimizing TCP Congestion Control on Long-Fat Networks

Evaluating queueing disciplines (FQ) paired with BBR congestion control across trans-Pacific links to minimize tail latency under bursty workloads.

NVMe I/O Scheduler Tuning for Append-Only Log Engines

Comparing io_uring polling modes and page cache writeback thresholds on Ubuntu LTS kernels for deterministic P99 commit latencies.

Automated Ephemeral TLS Certificate Lifecycle Management

Zero-downtime ECDSA P-256 certificate rotation using DNS-01 validation hooks and systemd service reload triggers.