From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sergei Trofimovich <slyich@gmail.com>
Subject: Re: speeding up slow btrfs filesystem
Date: Sat, 17 Dec 2011 10:03:02 +0300
Message-ID: <20111217100302.6beffbcd@sf.vba.domain>
References: <201112161851.52011.Martin@lichtvoll.de>
	<4906354.Rn8tlOeHyD@venice>
	<201112162053.58332.Martin@lichtvoll.de>
	<201112162158.45819.Martin@lichtvoll.de>
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Cc: linux-btrfs@vger.kernel.org
To: Martin Steigerwald <Martin@lichtvoll.de>
Return-path: <linux-btrfs-owner@vger.kernel.org>
In-Reply-To: <201112162158.45819.Martin@lichtvoll.de>
List-ID: <linux-btrfs.vger.kernel.org>

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On Fri, 16 Dec 2011 21:58:45 +0100
Martin Steigerwald <Martin@lichtvoll.de> wrote:

> Nope. Doesn=C2=B4t seem to help much.
>=20
> How to turn it off, after turning it on?
>=20
> deepdance:~> LANG=3DC mount -o remount,datacow /=20
> mount: / not mounted already, or bad option

In debian you can disable syncing on per-process basis:
    http://packages.debian.org/sid/eatmydata

$ eatmydata apt-get install foo
$ eatmydata firefox
$ eatmydata liferea

makes things more bearable

HTH

--=20

  Sergei

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