RGW Bucket Resharding Without Pausing

Introduction: The Foundation of Scalable Object Storage ¶ In the modern data landscape, object storage has evolved from a simple file repository into the foundational layer for AI/ML pipelines, data lakehouses, real-time analytics, and massive-scale archival systems. At the heart of this evolution is a deceptively simple question: How do you efficiently locate and access billions of objects stored in a single bucket? The answer lies in one of Ceph’s most critical performance mechanisms: bucket index sharding .