File System With Multi-Class In Situ Tiered Archiving

摘要

Example apparatus and methods provide a file system that stores files in multiple different logical units. The logical units are associated with different classes of devices. The file system interacts with the logical units through block-based interfaces. The file system is a single file system that spans the multiple logical units. The multiple different logical units include data storage devices for which the file system manages block storage allocation and an object storage system that manages its own block storage allocation rather than having the file system manage its block storage allocation. The file system may maintain a single namespace, hierarchy, or directory structure for the multiple logical units. The object storage system may protect files using redundant copies, erasure codes, or other approaches. An archive process may selectively move files from other devices to the object storage system and leave a symbolic link behind.

主权项

1. An electronic data storage system, comprising:
a file system configured to store files in two or more different logical units, where the file system interacts with a logical unit through a block-based interface; where the two or more different logical units comprise:
one or more data storage devices configured as logical units having block-based interfaces; andan object storage system configured as a logical unit having a block-based interface, where the file system manages block storage allocation for the one or more data storage devices, where the file system does not manage block storage allocation for the object storage system, where the object storage system manages block storage allocation for the object storage system, and where the file system addresses files in a single hierarchy that spans the two or more different logical units.