--- title: Uber’s Hive Federation Decentralizes 16K Datasets and... description: Uber redesigned its Hive data warehouse by federating over 16,000 datasets totaling 10+ petabytes, moving from a monolithic instance to a decentralized,... canonical: https://daily.dev/posts/uber-s-hive-federation-decentralizes-16k-datasets-and-10-pb-for-zero-downtime-analytics-at-scale-mye1iup4n twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Uber’s Hive Federation Decentralizes 16K Datasets and 10+ PB for Zero-Downtime Analytics at Scale | daily.dev og:description: Uber redesigned its Hive data warehouse by federating over 16,000 datasets totaling 10+ petabytes, moving from a monolithic instance to a decentralized,... og:url: https://daily.dev/posts/uber-s-hive-federation-decentralizes-16k-datasets-and-10-pb-for-zero-downtime-analytics-at-scale-mye1iup4n og:image: https://api.daily.dev/og/posts/mYE1IUP4n.png og:image:alt: Uber’s Hive Federation Decentralizes 16K Datasets and 10+ PB for Zero-Downtime Analytics at Scale 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. # Uber’s Hive Federation Decentralizes 16K Datasets and 10+ PB for Zero-Downtime Analytics at Scale **[InfoQ](https://daily.dev/sources/infoq)** · 3 min read · 4 upvotes · 0 comments ## Summary Uber redesigned its Hive data warehouse by federating over 16,000 datasets totaling 10+ petabytes, moving from a monolithic instance to a decentralized, domain-specific architecture. The migration uses a pointer-based approach in the Hive Metastore to redirect datasets to new HDFS locations without duplicating data, ensuring zero downtime for analytics and ML pipelines. Four key components handle the process: Bootstrap Migrator, Realtime Synchronizer, Batch Synchronizer, and Recovery Orchestrator. The result is improved ACL enforcement, reduced noisy-neighbor effects, better governance, and reclamation of over 1 PB of HDFS space through removal of stale datasets. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [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 - [350PB, Millions of Events, One System: Inside Uber’s Cross-Region Data Lake and Disaster Recovery](https://daily.dev/posts/350pb-millions-of-events-one-system-inside-uber-s-cross-region-data-lake-and-disaster-recovery-hwietwknw) · InfoQ · 2 upvotes · 0 comments - [Enterprise-Scale Governance: Migrating from Hive Metastore to Unity Catalog](https://daily.dev/posts/enterprise-scale-governance-migrating-from-hive-metastore-to-unity-catalog-8hzwkkza5) · databricks · 0 upvotes · 0 comments - [Scaling Zero Copy from 1 Trillion to 120 Trillion Rows with File Federation](https://daily.dev/posts/scaling-zero-copy-from-1-trillion-to-120-trillion-rows-with-file-federation-qyrcouu45) · Salesforce Engineering · 0 upvotes · 0 comments --- Tags: [#big-data](https://daily.dev/tags/big-data), [#apache-spark](https://daily.dev/tags/apache-spark) [View this post on daily.dev](https://daily.dev/posts/uber-s-hive-federation-decentralizes-16k-datasets-and-10-pb-for-zero-downtime-analytics-at-scale-mye1iup4n) ```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":"Uber’s Hive Federation Decentralizes 16K Datasets and 10+ PB for Zero-Downtime Analytics at Scale","url":"https://daily.dev/posts/uber-s-hive-federation-decentralizes-16k-datasets-and-10-pb-for-zero-downtime-analytics-at-scale-mye1iup4n","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/uber-s-hive-federation-decentralizes-16k-datasets-and-10-pb-for-zero-downtime-analytics-at-scale-mye1iup4n"},"datePublished":"2026-04-09T13:57:50.478Z","dateModified":"2026-04-09T13:58:10.303Z","description":"Uber redesigned its Hive data warehouse by federating over 16,000 datasets totaling 10+ petabytes, moving from a monolithic instance to a decentralized,...","image":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/07abf0008bbb920d8549759facb70868?_a=AQAEuop","thumbnailUrl":"https://media.daily.dev/image/upload/f_auto,q_auto/v1/posts/07abf0008bbb920d8549759facb70868?_a=AQAEuop","isAccessibleForFree":true,"articleSection":"InfoQ","inLanguage":"en","publisher":{"@type":"Organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180}},"author":{"@type":"Organization","name":"InfoQ","logo":"https://media.daily.dev/image/upload/t_logo,f_auto/v1/logos/afc3bced3e1e4b188dd9127017a60e0c","url":"https://daily.dev/sources/infoq"},"commentCount":0,"discussionUrl":"https://daily.dev/posts/uber-s-hive-federation-decentralizes-16k-datasets-and-10-pb-for-zero-downtime-analytics-at-scale-mye1iup4n","interactionStatistic":[{"@type":"InteractionCounter","interactionType":{"@type":"LikeAction"},"userInteractionCount":4},{"@type":"InteractionCounter","interactionType":{"@type":"CommentAction"},"userInteractionCount":0}],"keywords":"big-data,apache-spark","timeRequired":"PT3M"} {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://daily.dev"},{"@type":"ListItem","position":2,"name":"InfoQ","item":"https://daily.dev/sources/infoq"},{"@type":"ListItem","position":3,"name":"Uber’s Hive Federation Decentralizes 16K Datasets and 10+ PB for Zero-Downtime Analytics at Scale"}]} ```