linux-ext4 - Time for "mkdir" on ext3.

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 10 Mar 2011 08:11:19 +0100
From:	Rogier Wolff <R.E.Wolff@...Wizard.nl>
To:	linux-ext4@...r.kernel.org
Subject: Time for "mkdir" on ext3. 

Hi,

I have an ext3 filesystem. When I "cp -lr" a big tree there, it turns
out that the "mkdir" calls take the bulk of the time. IIRC there are
325000 directories (and 4 million files). Each mkdir call takes about
50ms (*), so that accounts for about 4.5 hours of the running time.

Would ext4 perform significantly better?

	Roger.

(*) I forgot about this Email while it was still in my editor. Now a
day layter the mkdir calls all take around 17ms, and things run about
3x faster. On the other hand it's been running for over 5 hours. And
yesterday I've seen a streak of >100ms mkdir calls... So apparently
it depends on "something".... 

-- 
** R.E.Wolff@...Wizard.nl ** http://www.BitWizard.nl/ ** +31-15-2600998 **
**    Delftechpark 26 2628 XH  Delft, The Netherlands. KVK: 27239233    **
*-- BitWizard writes Linux device drivers for any device you may have! --*
Q: It doesn't work. A: Look buddy, doesn't work is an ambiguous statement. 
Does it sit on the couch all day? Is it unemployed? Please be specific! 
Define 'it' and what it isn't doing. --------- Adapted from lxrbot FAQ
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html