Metadata layout

OneFS protects metadata by spreading it across nodes and drives.

Metadata—which includes information about where a file is stored, how it is protected, and who can access it—is stored in inodes and protected with locks in a B+ tree, a standard structure for organizing data blocks in a file system to provide instant lookups. OneFS replicates file metadata across the cluster so that there is no single point of failure.

Working together as peers, all the nodes help manage metadata access and locking. If a node detects an error in metadata, the node looks up the metadata in an alternate location and then corrects the error.