Mmastodon WorldImmigration first seen 1 d ago, last 9 h ago, peak #10
Shadow mode should be a default in software deployment
Original: 🆕 Shadow mode as a default, not a luxury Run the new implementation beside the old on real traffic, with every side effe
A software engineering writer argues that shadow mode—running a new implementation alongside the old one on real traffic with all side effects suppressed—should be standard practice rather than an optional extra. The argument is that contract tests verify the shape of a system, but shadow mode is what proves its actual behaviour before full rollout.
Why now: Practitioners are discussing safer deployment practices as more teams adopt progressive delivery and risk-reduction techniques.
Richard Coopershadow modecontract testing
Evidence
- 🆕 Shadow mode as a default, not a luxury Run the new implementation beside the old on real traffic, with every side effect suppressed. Contract tests prove the shape; shadow mode proves behaviour. Read it → https:// rj-cooper.co.uk/posts/shadow-m ode-as-a-default-not-a-luxury/… · RichardCooper@infosec.exchange · 4
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