Xline is an open-source management system for metadata stored in organizations with multiple data centers.

According to the project maintainers, one of the big challenges related to multi-data center architectures is maintaining data consistency and high performance. Xline was created to help solve that problem by allowing distributed storage and management.

“This project aims to enable a high-performance multi-cloud metadata management solution for multi-cloud scenarios, which is critical for organizations with geo-distributed and multi-active deployment requirements,” the project’s GitHub page states. 

It works by caching hot data in memory to provide access to data across clouds. Other features include support for the WAN consensus protocol, a distributed KV storage engine, and compatibility with ETCD.

Xline was accepted into the CNCF as a Sandbox project in June 2023.