Compressing unix disks
Don Speck
mangler at cit-vax.Caltech.Edu
Fri Apr 15 18:08:30 AEST 1988
In article <7582 at ncoast.UUCP>, allbery at ncoast.UUCP (Brandon Allbery) writes:
> you seem to need CPU to use the Berkeley FFS, and System V is popular on the
> little *nix boxes.
I've heard over and over that the Berkeley Fast Filesystem is considered a
CPU hog. So I tried a trivial experiment, a program that does 512 writes
of 8K bytes each (enough to exceed the buffer cache) and the times were:
3B20S SysV.2, 1K fs blocksize 32.6 real 0.0 user 11.4 sys
vax-750 4.3BSD 8K fs blocksize 8.5 real 0.0 user 8.2 sys
BSD beat SysV in system time, even though SysV was running
on a CPU twice as fast and optimized for SysV! So why does
everybody claim that the BSD filesystem is a CPU hog?
Don Speck speck at vlsi.caltech.edu {amdahl,ames!elroy}!cit-vax!speck
More information about the Comp.unix.wizards
mailing list