Which feature of OneFS allows all nodes to be managed as one?

The feature of OneFS that allows all nodes to be managed as one is the concept of a single namespace. A single namespace in OneFS means that all data is accessible from a unified view, regardless of which node in the cluster it resides on. This simplifies data management and provides a seamless experience for users and applications, as they do not need to worry about where the data is stored or which specific node is handling requests.

This unified management approach enhances scalability, as it allows organizations to easily expand their storage capacity by adding nodes without complicating the data structure or requiring significant reconfiguration. With a single namespace, all data is organized under one hierarchical file system, streamlining not only the data retrieval process but also administrative tasks such as backup, recovery, and data migration.

The other options relate to different aspects of data management and storage but do not provide the same benefit of unified management across all nodes. Data mirroring focuses on redundancy and data protection, file compression deals with optimizing storage usage, and system isolation pertains to ensuring certain processes remain separate for security or performance purposes. None of these features facilitate the unified management of nodes like the single namespace does.