[Info-vax] Anyone interested in another public access system

[glen herrmannsfeldt]

Bill Gunshannon <billg999 at cs.uofs.edu> wrote:
(someone wrote)
 
>> It's a bit weird that 562 files with 293 frags = 0.0% fragmentation...
 
> I have not looked at how the calculation is done but my guess would be
> that the 293 frags included unused areas of the files system that are
> empty frags but might at some point hold an entire file, depending, of
> course, on their size.  The 0.0% fragmentation I would take to mean the
> fragmentation of the files, which is the only thing that really matters
> when computing filesystem performance.

As I wrote earlier, frags are fragmented (large) blocks, mostly
used for small files.  I believe, then, that % fragmentation
is the % of the blocks in the whole file system that are fragmented.
A very large disk with many small files would have all its allocated
blocks fragmented (saves space and doesn't change performance),
and (rounded) 0% fragmentation. 

-- glen