Publication

Mantle: Efficient Hierarchical Metadata Management for Cloud Object Storage Services

Mantle is a new COSS metadata service for modern cloud workloads. It adopts a two-layer architecture: a scalable, sharded database (TafDB) shared across namespaces and a per-namespace IndexNode that caches basic directory metadata, enabling efficient single-RPC path queries and scalable metadata management.

SOSP 2025 / October 2025

cloud storagemetadata managementdistributed file systemsobject storage

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Authors

Jiahao Li, Yiduo Wang, Cheng Li, Kang Chen, Baidu Canghaixing Storage Team

Abstract

Mantle is a new COSS metadata service for modern cloud workloads. It adopts a two-layer architecture (TafDB + IndexNode) that enables efficient single-RPC path queries and scalable metadata management for large-scale cloud object storage services.