From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from lists.gentoo.org (pigeon.gentoo.org [208.92.234.80]) by finch.gentoo.org (Postfix) with ESMTP id 91BA1138CD0 for ; Tue, 19 May 2015 15:15:21 +0000 (UTC) Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 0BFDBE09ED; Tue, 19 May 2015 15:15:14 +0000 (UTC) Received: from mail-ie0-f169.google.com (mail-ie0-f169.google.com [209.85.223.169]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by pigeon.gentoo.org (Postfix) with ESMTPS id ECDE0E0942 for ; Tue, 19 May 2015 15:15:12 +0000 (UTC) Received: by ieczm2 with SMTP id zm2so16248727iec.1 for ; Tue, 19 May 2015 08:15:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:content-type; bh=g47N1PJeZlLeKWhbH/y6dqbuWEtUv8xKzUqFutlZPno=; b=FaGat7LMHpknBFjpSKNvkhXtRGuqMiMcwQ9i2u5BLOXsxn3k0+CvOn/De14WX+AVfR hHYPDaz0dWUKSym7tbdOaGb8xlOTLRhwAO+PWygftfttilAQ28icmI0ycscCpxAl4He3 GOL1dmKZyvieFfWN097bxS+GJRjMqVPgW4CAigwm9/W4wi4UULJSuD6zgq5Wl2GdtWQg beLxMA36h6f6TYL+7+5RKaHQnVHLQQNZQeu2q4JgB6wNnt97T7oBgY8nE8OS+GXdr8oW m48VDSOWFeCN8i+AcDWZMJbYuk4oyGvcMbQ/33elv08dUDiUmvJYGyIVeZGHVHuJ2JT2 03LQ== Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 X-Received: by 10.42.63.80 with SMTP id b16mr39991333ici.64.1432048512329; Tue, 19 May 2015 08:15:12 -0700 (PDT) Sender: freemanrich@gmail.com Received: by 10.107.159.81 with HTTP; Tue, 19 May 2015 08:15:12 -0700 (PDT) In-Reply-To: <1974724.vrJ2Jfp0RF@wstn> References: <1830324.ihloPU4zbT@wstn> <1974724.vrJ2Jfp0RF@wstn> Date: Tue, 19 May 2015 11:15:12 -0400 X-Google-Sender-Auth: MoTYHsGc8bfU3Jdt-QhN49rS2cI Message-ID: Subject: Re: [gentoo-user] Tips for fresh install with GRUB2+RAID1+LVM2 From: Rich Freeman To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=UTF-8 X-Archives-Salt: 30f88a65-2b9a-4fc9-98d7-bcdd83f63617 X-Archives-Hash: 7e972674d3439b759df9bb85d9fb8024 On Tue, May 19, 2015 at 11:00 AM, Peter Humphrey wrote: > On Tuesday 19 May 2015 10:53:26 Rich Freeman wrote: >> On Tue, May 19, 2015 at 10:44 AM, Peter Humphrey > wrote: >> > Incidentally, what's the received wisdom on frequency of file-system >> > trimming on SSDs these days? I've seen values quoted between twice a day >> > and once a week. And how does trimming affect btrfs? >> >> 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. > > Ah, well that's quite different from my Atom box with its 64GB SSD; before I > remove the -v a few weeks ago it was reporting many megabytes trimmed most > times it ran. That's on ext4 and running Gentoo with http-replicator service. > So, I was inspired to look into this yet again. Looks like it is the subject of this: https://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg40618.html It doesn't look like this is in 3.18 yet. So, I'm basically running without trimming. -- Rich