Vladimir V. Saveliev wrote:
Hello
On Friday 11 August 2006 21:44, Gasper Azman wrote:
Hello everyone, especially the namesys team.
I have been reading this list for quite some time, and saw that issues
of fragmentation have again arisen. So, a decision was made to put the
portage tree on a separate reiser4 partition, and to benchmark it over
time.
Because I know I'm not the smartest guy in the universe, I'm asking
everyone here which data they would require (or want to see), how to
obtain it (program names would suffice, but other advice will not go
amiss) and how frequently the analysis is to be run.
reiser4progs incluses a program measurefs.reiser4. It should be able to
measure tree fragmentation. I am not sure how does portage tree evolve, but
maybe it could be interesting too see how does reiser4 tree fragmentation
change when filesystem is loaded regularly.
Ok. I'm gonna see about the program, and run it after each emerge
--sync.
About the portage tree evolving, it's a lot (~150000) of <2k files,
some never change, and some change very often. New ones are added and
old ones deleted on a similar principle. People have been complaining
for quite some time that, while at first they experienced major
speedups regarding the operation of portage and the rsync process, it
slowed to a halt about half a year afterwards. Some blame
fragmentation, and this may be the key to diagnosing the problem.
Thanks for your help.
Gasper
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