Northwind Labs

Engineering notes · infrastructure · storage

Recent entries

QUIC path MTU discovery in practice

Why 1200-byte datagrams still matter, and what breaks when middleboxes disagree.

Keepalive intervals and idle connection reaping

Measured behaviour of long-lived TLS sessions behind consumer NAT.

Reading NVMe wear indicators without vendor tools

A short walk through SMART attributes and what they actually predict.

Cheap asynchronous replication for small clusters

Notes from running two-node replication over unstable links.