From: Jeff Mahoney <jeffm@suse.com>
To: Jaroslav Fojtik <JaFojtik@seznam.cz>
Cc: Edward Shishkin <edward.shishkin@gmail.com>,
Reiserfs mailing list <reiserfs-devel@vger.kernel.org>
Subject: Re: Re10: Reiserfs3 is crashing - where/whom to report?
Date: Wed, 21 Jan 2009 14:25:24 -0500 [thread overview]
Message-ID: <497776A4.8000002@suse.com> (raw)
In-Reply-To: <497778C6.8346.108280@JaFojtik.seznam.cz>
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Jaroslav Fojtik wrote:
> Dear Jeff,
>
>> Why would you want a file system with a different block size anyway? 4k
>> is nearly universal as a block size, and it also happens to match the
>> page size on most linux systems. Going down just slows your system down.
> It is over, because it does not work. Do not worry.
>
> Please have a look at attached image. It shows how many wasted space is
> generated by larger block sizes on 32GB hard drive with around 20GB data.
> So I assume 7GB of wasted space for my HDD.
>
> I am planning reiserfs just because startup time. Ext2 with 20GB needs
> sometimes more than one hour to be checked up. I am afraid of 32 hours
> running ext2fsck.
Well then I have good news for you. That graph is for fat32, which is
really really dumb in the way it does allocations. Reiserfs does "tail
packing," which allows us to pack data in with metadata, eliminating
most of the waste that you're afraid of. In fact, by choosing a smaller
block size, you actually waste *more* space since more metadata is
needed to describe it, and each of those metadata blocks needs a portion
of it for headers, etc.
- -Jeff
- --
Jeff Mahoney
SUSE Labs
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.9 (GNU/Linux)
Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org
iEYEARECAAYFAkl3dqQACgkQLPWxlyuTD7KOdwCgoPs3UxgdETHZ5p4D/czIqV1I
Jr4AoIA6QFySoLr5OaRsHawTbTD4GDzd
=HRr2
-----END PGP SIGNATURE-----
next prev parent reply other threads:[~2009-01-21 19:25 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <49750FC1.23700.2C929@JaFojtik.seznam.cz>
2009-01-20 0:20 ` Reiserfs3 is crashing - where/whom to report? Edward Shishkin
2009-01-20 4:49 ` Jeff Mahoney
2009-01-20 9:09 ` Re2: " Jaroslav Fojtik
[not found] ` <49759410.20384.D37CA@JaFojtik.seznam.cz>
2009-01-20 10:45 ` Edward Shishkin
2009-01-20 14:54 ` Jeff Mahoney
2009-01-20 17:49 ` Re4: " Jaroslav Fojtik
2009-01-20 18:19 ` Edward Shishkin
2009-01-20 18:49 ` Re6: " Jaroslav Fojtik
2009-01-20 18:54 ` Edward Shishkin
2009-01-20 21:20 ` Re8: " Jaroslav Fojtik
2009-01-20 23:07 ` Jeff Mahoney
2009-01-21 19:34 ` Re10: " Jaroslav Fojtik
2009-01-21 19:25 ` Jeff Mahoney [this message]
2009-01-27 21:30 ` Re12: " Jaroslav Fojtik
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=497776A4.8000002@suse.com \
--to=jeffm@suse.com \
--cc=JaFojtik@seznam.cz \
--cc=edward.shishkin@gmail.com \
--cc=reiserfs-devel@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.