linux-kernel - Re: the " 'official' point of view" expressed by kernelnewbies.org regarding reiser4 inclusion

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Message-ID: <20060731171620.GL31121@lug-owl.de>
Date:	Mon, 31 Jul 2006 19:16:20 +0200
From:	Jan-Benedict Glaw <jbglaw@...-owl.de>
To:	Dan Oglesby <doglesby@...eformix.com>
Cc:	Adrian Ulrich <reiser4@...nkenlights.ch>,
	Matthias Andree <matthias.andree@....de>,
	vonbrand@....utfsm.cl, ipso@...ppymail.ca, reiser@...esys.com,
	lkml@...productions.com, jeff@...zik.org, tytso@....edu,
	linux-kernel@...r.kernel.org, reiserfs-list@...esys.com
Subject: Re: the " 'official' point of view" expressed by kernelnewbies.org regarding reiser4 inclusion

On Mon, 2006-07-31 11:47:00 -0500, Dan Oglesby <doglesby@...eformix.com> wrote:
> On Mon, 2006-07-31 at 18:22 +0200, Jan-Benedict Glaw wrote:
> > On Mon, 2006-07-31 17:59:58 +0200, Adrian Ulrich <reiser4@...nkenlights.ch> wrote:
> > > A colleague of mine happened to create a ~300gb filesystem and started
> > > to migrate Mailboxes (Maildir-style format = many small files (1-3kb))
> > > to the new LUN. At about 70% the filesystem ran out of inodes; Not a
> > So preparation work wasn't done.
> 
> As someone who is currently planning to migrate ~100GB of stored mail to
> the Maildirs format, it was pretty clear early on that EXT3 would not
> cut it (from past and current experiences), and not just for the sake of
> calculating inodes.

Uh?  Where did you face a problem there?

With maildir, you shouldn't face any problems IMO. Even users with
zillions of mails should work properly with the dir_index stuff:

	tune2fs -O dir_index /dev/hdXX

or alternatively (to start that for already existing directories):

	e2fsck -fD /dev/hdXX


Of course, you'll always face a problem with lots of files in one
directory at getdents() time (eg. opendir()/readdir()/closedir()), but
this is a common limit for all filesystems.

MfG, JBG

-- 
       Jan-Benedict Glaw       jbglaw@...-owl.de                +49-172-7608481
Signature of:           Alles wird gut! ...und heute wirds schon ein bißchen besser.
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