Daily Term: Shadowing

Shadowing

Shadowing is a testing technique where live traffic is mirrored to a new system without affecting the primary system, allowing the new system to be tested under real conditions. For example, a new API version might receive a copy of all requests sent to the old version, comparing responses for validation. Shadowing helps ensure reliability before a full switch, but it doubles the load on infrastructure and requires careful comparison logic.

Date: 2025-09-24

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Previous Terms

Dark Pool

A deployment strategy for testing without user impact.

Date: 2025-09-23

A/B Testing

Comparing two versions to determine the better one.

Date: 2025-09-22