sp26-cs537 cs537
Lecture 20 - Fast File System (FFS) Lecture 20 - Fast File System (FFS)
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Recap: VSFS Layout
Locality
File Layout Quality
The Old UNIX File System
Aging Hurts Even More
Old FS Summary
System Building (Pro Approach)
Disk-Aware File System: FFS
Technique: Groups
Replicated Super Blocks
FFS Placement Policy
Revised Strategy
Where to Cut the Tree?
Policy Summary
Problem: Large Files
Solution: Split Large Files Across Groups
Final FFS Policy
Other FFS Features
FFS Summary
Source