UDT Insights
Practical perspectives on technology, engineering, and delivery.
Reliability and Operations
A maintenance window is a coordinated business change, not simply a quiet time to deploy. Define customer impact, decision authority, rollback limits, and update messages before agreeing when the work may proceed.
Read article
Reliability and Operations
Certificate renewal and domain renewal are different responsibilities. Build an ownership record, verify the certificate actually served, and test recovery paths before a deadline turns a routine dependency into a customer-facing disruption.
Read article
Reliability and Operations
A cache adds a second place from which customers may receive data. Decide acceptable staleness, identity boundaries, invalidation triggers, and failure behavior before using faster responses as the main acceptance criterion.
Read article
Reliability and Operations
Background work needs a visible end to automatic recovery. Define retry eligibility, duplicate protection, attempt limits, and an operator decision for jobs that cannot finish safely within their useful lifetime.
Read article
Reliability and Operations
A registered-user total is a weak capacity specification. Describe the work people and automated tasks create, test representative bursts, and define the service boundary that matters before approving a larger operating budget.
Read article
Reliability and Operations
A responding process may still be unable to serve useful requests. Separate startup, liveness, and readiness decisions, then test dependency failures and recovery behavior before using health checks to control traffic.
Read article
Reliability and Operations
A deployment log should explain what happened without becoming a second store of credentials. Review the entire secret path, distinguish audit metadata from secret values, and prepare a response for accidental disclosure.
Read article
Reliability and Operations
An unchanged application can behave differently after its operating settings change. Compare intended configuration with effective settings, classify approved exceptions, and test a narrow explanation before committing to an application rewrite.
Read article
Reliability and Operations
Collecting more telemetry does not automatically answer a diagnostic question. Assign logs, metrics, and traces distinct jobs, connect their context, and choose evidence that helps explain the customer symptom without unnecessary sensitive data.
Read article