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School of Computer Science & Engineering
University of New South Wales
 Advanced Operating Systems 
 COMP9242 2002/S2 

LFS Performance: Comparison with FFS

Seltzer et al[SSB$^+$95]:

• Compared Seltzer's BSD implementation of LFS to BSD-FFS
  • without clustering,
  • with clustering.
• Also compared to Ousterhout's Sprite implementation of LFS (for calibration).
• Used a range of benchmarks testing performance under different scenarios.

Small file microbenchmarks

Large file microbenchmarks

Throughput benchmarks

CreateRead

Throughput benchmarks

OverwriteDelete

Transaction processing (TPC-B benchmark)

Random read-update-record, using logging to separate disk.