https://www.infoq.com InfoQ Sharding News feed https://www.infoq.com/news/2026/09/uber-m3db-subcluster-sharding/?utm_campaign=infoq_content&utm_source=infoq&utm_medium=feed&utm_term=Sharding-news <img src="https://res.infoq.com/news/2026/09/uber-m3db-subcluster-sharding/en/headerimage/generatedHeaderImage-1788717337142.jpg"/><p>Uber has redesigned shard placement in M3DB with fixed size subclusters to limit the impact of node failures, maintenance, and cluster scaling. The approach bounds shard dependencies, preserves replica isolation, and uses a greedy algorithm to select shard migrations while avoiding a separate rebalancing pass and unnecessary data movement.</p> <i>By Leela Kumili</i> Database Load Balancing Database Replication Microservices Algorithms Fault Tolerance Open Source Scalability Time Series Data Sharding Uber Availability Distributed Systems Clusters DevOps Architecture & Design Development news Mon, 21 Sep 2026 14:37:00 GMT https://www.infoq.com/news/2026/09/uber-m3db-subcluster-sharding/?utm_campaign=infoq_content&utm_source=infoq&utm_medium=feed&utm_term=Sharding-news Leela Kumili 2026-09-21T14:37:00Z /news/2026/09/uber-m3db-subcluster-sharding/en