linux-ext4 - Re: ext4 unlink performance

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 for Android: free password hash cracker in your pocket

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

Date:	Fri, 14 Nov 2008 09:48:48 -0600
From:	Bruce Guenter <lists-linux-ext4@...ce-guenter.dyndns.org>
To:	linux-ext4@...r.kernel.org
Subject: Re: ext4 unlink performance

On Fri, Nov 14, 2008 at 09:59:14AM -0500, Theodore Tso wrote:
> This is beginning to perhaps sound like a layout problem of some kind.
> How big is the filesystem that you are testing against?

The partition is almost 30GB.

> I'm guessing
> that if you have 725,000 small files, that it can't be much more than
> a gig or two, right?

The compressed stream itself expands to 4.4GB, and more on disk due to
block sizes.

> Can you send me the output of 
> 
>     e2image -r /dev/XXX - | bzip2 ext4.e2i.bz2
> 
> for both the ext4 and ext3 filesystems, after you have loaded them
> with your small files, and before you delete them?

Will do.  Can you accept LZMA so I can save a bit of bandwidth?

-- 
Bruce Guenter <bruce@...roubled.org>                http://untroubled.org/

Content of type "application/pgp-signature" skipped