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Date: Tue, 19 May 2015 17:21:39 +0200
From: Marc Joliet <marcec@gmx.de>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2
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Am Tue, 19 May 2015 10:53:26 -0400
schrieb Rich Freeman <rich0@gentoo.org>:

> On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey <peter@prh.myzen.co.uk> =
wrote:
> >
> > Incidentally, what's the received wisdom on frequency of file-system tr=
imming
> > on SSDs these days? I've seen values quoted between twice a day and onc=
e a
> > week. And how does trimming affect btrfs?
> >
>=20
> I've been trimming mine daily, and I've yet to be able to distinguish
> it from a no-op.  As far as I can tell fstrim -v always outputs 0
> bytes trimmed.

(Note that I'm also a btrfs user.)

I've been using the systemd timer that comes with util-linux upstream witho=
ut
modification, which runs fstrim weekly.  That seems to work well, but to be
quite honest, I wouldn't know how to tell.  Sometimes I wasn't even sure it
ran, so I would run it manually, and it always finished nigh-instantaneousl=
y.

Before that, I used the discard mount option, but apparently that's only a =
good
idea with high-end SSDs (not that I noticed much of a difference in everyday
usage).

--=20
Marc Joliet
--
"People who think they know everything really annoy those of us who know we
don't" - Bjarne Stroustrup

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