From: Martin Steigerwald <Martin@lichtvoll.de>
To: linux-btrfs@vger.kernel.org
Cc: "Swâmi Petaramesh" <swami@petaramesh.org>, Alex <alex@bpmit.com>
Subject: Re: BTRFS, getting darn slower everyday
Date: Sun, 7 Oct 2012 16:44:19 +0200 [thread overview]
Message-ID: <201210071644.19815.Martin@lichtvoll.de> (raw)
In-Reply-To: <50718151.8090506@petaramesh.org>
Am Sonntag, 7. Oktober 2012 schrieb Swâmi Petaramesh:
> Hi again ;-)
>
> Le 07/10/2012 14:33, Alex a écrit :
> > 1. Convert to a 16k or 32k leafsize.
>
> How should I do this ? Can I do this on a live FS, and isn't this going
> to double my on-disk used space (I have active snapshots...)
I think you need to backup, reformat and restore from backup for now.
> > 2. defragment (each non-trivial file) every now and again
>
> I believed that the "autodefrag" mount option was supposed to avoid the
> need for manual defrags...?
In theory yes. But AFAIR it is currently limited to certain usecases.
> Plus, with respect to snapshots, isn't this going to increase a lot my
> used disk space ?
I don´t think so, but I will leave this to a developer to answer.
> > 3. Note that btrfs in kernel 3.6 (vs 3.5) does appear to be quite a
> > bit quicker.
>
> I'm not sure that "a bit" quicker will be enough, when I see my BTRFS
> is currently about 8x slower than what ext4 user to...
How did you measure this? Is this just the boot times you mentioned in the
original article?
--
Martin 'Helios' Steigerwald - http://www.Lichtvoll.de
GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7
next prev parent reply other threads:[~2012-10-07 14:44 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-07 9:26 BTRFS, getting darn slower everyday Swâmi Petaramesh
2012-10-07 10:59 ` Martin Steigerwald
2012-10-07 14:05 ` Swâmi Petaramesh
2012-10-07 14:48 ` Martin Steigerwald
2012-10-08 6:16 ` Swâmi Petaramesh
2012-12-09 5:17 ` Jan Engelhardt
2012-12-09 10:13 ` Martin Steigerwald
2012-12-09 10:41 ` Roman Mamedov
2012-12-09 11:20 ` Swâmi Petaramesh
2012-12-09 11:38 ` Hugo Mills
2012-12-09 22:51 ` Bob Marley
2012-12-09 14:38 ` Jan Engelhardt
2012-10-07 11:02 ` Martin Steigerwald
2012-10-07 12:33 ` Alex
2012-10-07 13:19 ` Swâmi Petaramesh
2012-10-07 14:44 ` Martin Steigerwald [this message]
2012-10-07 22:47 ` Goffredo Baroncelli
2012-10-08 6:08 ` Swâmi Petaramesh
2012-10-08 11:38 ` Goffredo Baroncelli
2012-10-08 13:36 ` Swâmi Petaramesh
2012-10-08 15:50 ` Swâmi Petaramesh
2012-10-08 16:46 ` Goffredo Baroncelli
2012-10-08 6:22 ` Swâmi Petaramesh
2012-11-14 16:17 ` Peter Maloney
2012-10-07 13:00 ` Martin Steigerwald
2012-10-07 13:14 ` Swâmi Petaramesh
2012-10-07 14:41 ` Martin Steigerwald
2012-10-08 16:09 ` Josef Bacik
2012-10-08 16:15 ` Swâmi Petaramesh
2012-10-08 16:31 ` Josef Bacik
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