What zero-downtime upgrades actually require
A field guide to sequencing control-plane, storage, and workload changes without turning maintenance into an outage.
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Field notes / Latest
What production is teaching us.
Engineering notes from operating open infrastructure: the failures, design decisions, and upstream work that make open infrastructure better.
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Designing Ceph failure domains for the failures you really have
Why rack diagrams, recovery traffic, and operational ownership belong in the same design review.
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Upstream first is an operating model, not a slogan
How production feedback becomes a smaller patch queue, healthier upstream projects, and fewer private forks.
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