Recommended max. limit of number of files per directory?
Christian Kujau
lists at nerdbynature.de
Thu Mar 26 04:58:53 UTC 2009
On Wed, 25 Mar 2009, howard chen wrote:
>> If you turn on directory hashing it scales better but eventually
>> performance will still tank. You can use tune2fs to see how it is set and
>> change it if necessay.
>
> Yes, but I want to know if any testings was performed before?
This made me curious as well, but apart from an rather old benchmark[0] I
found nothing recent. I wrote a small benchmark script that will touch,
cat, rm a large amount of files in/from a single directory. The script is
currently still running, trying to create 10M files on a 4GB partition;
the results so far:
http://nerdbynature.de/bench/sid/2009-03-26/di-b.log.txt
http://nerdbynature.de/bench/sid/2009-03-26/
(dmesg, .config, JFS oops, benchmark script)
However, the correct answer is of course: do these tests with your
applicaton and see if these results really match. And publish your
results :)
Christian.
[0] http://lwn.net/Articles/14631/
--
Bruce Schneier found the inverse of the constant zero function.
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