Astutebay
Practical engineering writing for people who keep systems alive.
What Good Observability Actually Looks Like
May 15, 2026
Dashboards multiply like rabbits and answer questions nobody asked this month. Good observability starts from the opposite direction: the alert fired, a human is awake, and the tooling should answer 'what changed' within a minute.
In practice that means a small set of high-cardinality traces on the request path, deployment markers on every graph that matters, and logs structured enough that you can pivot from a customer ID to a timeline without five grep commands.
Why Edge Caching Still Matters in 2026
July 31, 2026
Every few years someone declares the edge cache obsolete: bandwidth is cheap, compute is fast, so why bother? Yet p99 latency keeps telling a different story. The round trip from a user in Sao Paulo to an origin in Frankfurt costs around 200 ms on a good day, and no amount of application optimisatio…
A Field Guide to Graceful Degradation
April 16, 2026
Architectures need an explicit hierarchy of failure. Recommendation engines should yield before purchasing flows break; query auto-complete should disable before search fails; generated previews should drop before source content vanishes. Formulating this priority map and reinforcing it through isol…
Email Deliverability: Authentication Beyond SPF
August 4, 2026
Traditional SPF checking fails to address modern deliverability challenges on its own. While an envelope IP check might succeed, mismatched headers trigger spam filters that prioritize cryptographic DKIM validations and broader DMARC policy rules.…
HTTP/3 and QUIC: What Changed for Operators
July 11, 2026
Relocating the transport layer to userspace and wrapping headers in encryption makes QUIC a privacy milestone that complicates packet capture analysis. Metrics like congestion parameters and stream flow control are no longer readable off raw wire captures without decrypting via session secrets.…
More reading
- A Practical Guide to API Rate Limiting — Engineering, September 15, 2026
- Reading Latency Percentiles Without Fooling Yourself — Operations, August 14, 2026
- Cache Invalidation Patterns That Survive Traffic — Data, June 25, 2026
About us
We are a small team of infrastructure engineers and technical writers. We publish what we learn running production systems: incident retrospectives, protocol deep-dives and tooling notes.