The Debian Technical Committee has intervened to override a systemd change that restricted the permissions of the /run/lock directory, which is essential for various software applications. This change, introduced in systemd v258, has caused compatibility issues for programs relying on world-writable access to the directory, prompting discussions about the relevance of the Filesystem Hierarchy Standard (FHS) and the future of such configurations in Debian.

The article introduces TernFS, an open-source, exabyte-scale distributed filesystem developed by XTX Markets to meet the growing storage demands of their algorithmic trading operations. TernFS is designed to handle large-scale compute efforts with features like redundancy, multi-region support, and a permissionless architecture, while also addressing the limitations of existing filesystems. The article outlines its architecture, key components, and the practical implementation details of TernFS.