Hans Reiser wrote:
Ingo Bormuth wrote:
#df:
/dev/hda8 6357768 3478716 2879052 55% /cache
Before doing so, the partition was >90% full.
The performance difference between >90% full and 55% full will be large
on every filesystem. When we ship a repacker, that will be less true,
because we will have large chunks of unused space after the repacker runs.
Not always true. For one, doesn't Reiser4 arbitrarily reserve 5%? For
another, look at his results -- unless I'm wrong, that's 3-7%
fragmentation. If I'm wrong, it's more like .03-.07%.
And lastly, at a certain point, percentages aren't really that accurate.
I've got a 350 or 400 gig partition which is 95% full, according to df
(which if I was right about that 5%, it's more like 90% full) and that
still leaves a solid 10-20 gigs free.
I mean, yes, performance will eventually start to suffer, but how much
time and activity will it take to fragment 20 gigs of free space,
especially with lazy allocation?
