https://www.infoq.com InfoQ Sharding 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 <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 Database Replication Load Balancing Sharding Availability Distributed Systems Clusters Scalability Time Series Data Open Source Uber Microservices Algorithms Fault Tolerance 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 Leela Kumili 2026-09-21T14:37:00Z /news/2026/09/uber-m3db-subcluster-sharding/en