--- title: From Minutes to Seconds: Uber Boosts MySQL Cluster... description: Uber redesigned its MySQL infrastructure by replacing external failover mechanisms with MySQL Group Replication (MGR), a Paxos-based consensus protocol. The... canonical: https://daily.dev/posts/from-minutes-to-seconds-uber-boosts-mysql-cluster-uptime-with-consensus-architecture-1uhaxiyym twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: From Minutes to Seconds: Uber Boosts MySQL Cluster Uptime with Consensus Architecture | daily.dev og:description: Uber redesigned its MySQL infrastructure by replacing external failover mechanisms with MySQL Group Replication (MGR), a Paxos-based consensus protocol. The... og:url: https://daily.dev/posts/from-minutes-to-seconds-uber-boosts-mysql-cluster-uptime-with-consensus-architecture-1uhaxiyym og:image: https://api.daily.dev/og/posts/1UHaXiyym.png og:image:alt: From Minutes to Seconds: Uber Boosts MySQL Cluster Uptime with Consensus Architecture og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # From Minutes to Seconds: Uber Boosts MySQL Cluster Uptime with Consensus Architecture **[InfoQ](https://daily.dev/sources/infoq)** · 3 min read · 0 upvotes · 0 comments ## Summary Uber redesigned its MySQL infrastructure by replacing external failover mechanisms with MySQL Group Replication (MGR), a Paxos-based consensus protocol. The new architecture embeds leader election and failure detection directly in the database layer using three-node MGR clusters, reducing failover time from minutes to under 10 seconds. Scalable read replicas fan out from secondaries to separate read scaling from write availability. Flow control within MGR prevents replication lag and errant GTIDs. The rollout was automated with a control plane handling onboarding, node replacement, topology rebalancing, and quorum protection. Trade-offs include a slight increase in write latency (hundreds of microseconds), but write unavailability during failures dropped dramatically. Single-primary mode was chosen over multi-primary for operational simplicity. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Uber Redesigns M3DB Sharding with Subclusters to Limit Failure Impact](https://daily.dev/posts/uber-redesigns-m3db-sharding-with-subclusters-to-limit-failure-impact-4hxesogyl) · InfoQ · 0 upvotes · 0 comments - [The Failover Brownout: Rethinking High Availability in MySQL Group Replication](https://daily.dev/posts/the-failover-brownout-rethinking-high-availability-in-mysql-group-replication-ck8ggeech) · Percona Blog · 4 upvotes · 0 comments - [Hybrid Cloud Data at Uber: How Engineers Solved Extreme-Scale Replication Challenges](https://daily.dev/posts/hybrid-cloud-data-at-uber-how-engineers-solved-extreme-scale-replication-challenges-x893npjjc) · InfoQ · 3 upvotes · 0 comments - [When failover isn’t safe: Building high-availability PostgreSQL on Kubernetes](https://daily.dev/posts/when-failover-isn-t-safe-building-high-availability-postgresql-on-kubernetes-nljmhojvb) · Datadog · 4 upvotes · 1 comments - [How Uber Serves over 150 Million Reads per Second from Integrated Cache](https://daily.dev/posts/how-uber-serves-over-150-million-reads-per-second-from-integrated-cache-mjlsygxjr) · ByteByteGo · 217 upvotes · 5 comments --- Tags: [#mysql](https://daily.dev/tags/mysql), [#distributed-systems](https://daily.dev/tags/distributed-systems), [#uber](https://daily.dev/tags/uber) [View this post on daily.dev](https://daily.dev/posts/from-minutes-to-seconds-uber-boosts-mysql-cluster-uptime-with-consensus-architecture-1uhaxiyym) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"From Minutes to Seconds: Uber Boosts MySQL Cluster Uptime with Consensus Architecture","url":"https://daily.dev/posts/from-minutes-to-seconds-uber-boosts-mysql-cluster-uptime-with-consensus-architecture-1uhaxiyym","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/from-minutes-to-seconds-uber-boosts-mysql-cluster-uptime-with-consensus-architecture-1uhaxiyym"},"datePublished":"2026-03-11T14:21:20.579Z","dateModified":"2026-03-11T14:21:39.328Z","description":"Uber redesigned its MySQL infrastructure by replacing external failover mechanisms with MySQL Group Replication (MGR), a Paxos-based consensus protocol. 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