Re: some testing questions

[Gasper Azman <gazman@email.si>]

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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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