Global Shortage Has Led to Motor Oil Rationing at Costco

Redis Is Not Your Database: Designing Cache Failures, Fallbacks, and Resilient Backends

Redis can make a backend dramatically faster. It can also make a backend dramatically more fragile if the architecture treats the cache as a dependency that must always be available.

8h ago ·dev.to

One instance was bad at its job and nothing was designed to notice

Checkout errors sat between three and eight percent for most of a Thursday. Not enough to page, because our threshold is one percent sustained across the service and the service was at 0.4.

8h ago ·dev.to

I labelled a dependency cycle "unknown" and called it rigour

I have spent a while arguing that checks need a third value: not every result is pass or fail, and folding "I could not determine this" into either one is how a suite starts lying.

• The author proposes labeling dependency cycles as UNKNOWN instead of FAIL.
• UNKNOWN indicates undetermined outcomes, while FAIL denotes actual failures.
• Implementing this distinction prevents hiding failures and enables informed decisions.

8h ago ·dev.to

Mainframe Migration Tools: What Works and What Fails

Every mainframe migration begins with someone searching for mainframe migration tools, and every vendor demonstration that follows looks remarkably convincing.

• Discovery and analysis tools are most valuable for understanding complex mainframe environments.
• Rehosting platforms are predictable but don't address COBOL codebase maintenance.

8h ago ·dev.to