# Lessons from Alaska's outage: Redundant ≠ resilient

DevFeed: [Lessons from Alaska's outage: Redundant ≠ resilient](<https://devfeed.tech/articles/lessons-from-alaska-s-outage-redundant-resilient-11659.md>)

Original publisher: [Read original article](<https://www.gremlin.com/blog/lessons-from-alaskas-outage-redundant-resilient>)

Author: Gavin Cahill

Published: 2025-07-24T00:00:00Z

Content type: article

Language: en

Sources: [Gremlin Blog](<https://devfeed.tech/sources/gremlin-blog.md>)

Topics: [Resilience](<https://devfeed.tech/topics/resilience.md>), [Availability](<https://devfeed.tech/topics/availability.md>), [Cache](<https://devfeed.tech/topics/cache.md>), [Database](<https://devfeed.tech/topics/database.md>), [Network](<https://devfeed.tech/topics/network.md>)

Tags: [architectures](<https://devfeed.tech/tags/architectures.md>), [cache](<https://devfeed.tech/tags/cache.md>), [cost](<https://devfeed.tech/tags/cost.md>), [data](<https://devfeed.tech/tags/data.md>), [network](<https://devfeed.tech/tags/network.md>), [outage](<https://devfeed.tech/tags/outage.md>), [resilience](<https://devfeed.tech/tags/resilience.md>), [testing](<https://devfeed.tech/tags/testing.md>), [use-cases](<https://devfeed.tech/tags/use-cases.md>)

## AI overview

The article examines Alaska Airlines' outage to explain why redundancy does not automatically provide resilience. It argues that resilience testing, including blackhole experiments that simulate unavailable resources, provides data for balancing redundancy costs against outage risk.

## Source excerpt

Redundancy is a core part of designing resilient architectures, but only if you build the right amount of redundancy. Find that sweet spot of redundancy with resilience testing.