HighLight: Using a Log-structured File System for Tertiary Storage Management
John T. Kohl, Michael Stonebraker, Carl Staelin · 1992
Abstract Robotic storage devices offer huge storage capacity at alow cost per byte, but with large access times. Integrating these devices into the storage hierarchy presents a chal-lenge to file system designers. Log-structured file systems (LFSs) were developed to reduce latencies involved in ac-cessing disk devices, but their sequential write patterns match well with tertiary storage characteristics. Unfortu-nately, existing versions only manage memory caches and disks, and do not support a broader storage hierarchy. HighLight extends 4.4BSD LFS to incorporate both sec-ondary storage devices (disks) and tertiary storage devices