Uber Redesigns M3DB Sharding with Subclusters to Limit Failure Impact

Leela Kumili — Mon, 21 Sep 2026 14:37:00 GMT

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.

By Leela Kumili

Kubernetes Multi-Cluster Project Karmada Reaches CNCF Graduation

Claudio Masolo — Thu, 17 Sep 2026 10:00:00 GMT

The Cloud Native Computing Foundation (CNCF) announced on September 2026 that Karmada, a multi-cluster and multi-cloud Kubernetes orchestration project, has graduated. This multi-cluster and multi-cloud Kubernetes orchestration project reached CNCF's highest maturity tier.

By Claudio Masolo

InfoQ - Clusters - News

Uber Redesigns M3DB Sharding with Subclusters to Limit Failure Impact

Kubernetes Multi-Cluster Project Karmada Reaches CNCF Graduation