From owner-freebsd-fs@FreeBSD.ORG  Tue Nov  2 19:27:12 2010
Return-Path: <owner-freebsd-fs@FreeBSD.ORG>
Delivered-To: fs@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id C75BA1065674
	for <fs@freebsd.org>; Tue,  2 Nov 2010 19:27:12 +0000 (UTC)
	(envelope-from mi+thun@aldan.algebra.com)
Received: from mail2.timeinc.net (mail2.timeinc.net [64.236.74.30])
	by mx1.freebsd.org (Postfix) with ESMTP id 6E69A8FC27
	for <fs@freebsd.org>; Tue,  2 Nov 2010 19:27:11 +0000 (UTC)
Received: from mail.timeinc.net (mail.timeinc.net [64.12.55.166])
	by mail2.timeinc.net (8.13.8/8.13.8) with ESMTP id oA2JRB58019769
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Tue, 2 Nov 2010 15:27:11 -0400
Received: from ws-mteterin.dev.pathfinder.com (ws-mteterin.dev.pathfinder.com
	[209.251.223.173])
	by mail.timeinc.net (8.13.8/8.13.8) with SMTP id oA2JRAvC018230;
	Tue, 2 Nov 2010 15:27:11 -0400
Message-ID: <4CD0660E.2000102@aldan.algebra.com>
Date: Tue, 02 Nov 2010 15:27:10 -0400
From: "Mikhail T." <mi+thun@aldan.algebra.com>
Organization: Virtual Estates, Inc.
User-Agent: Mozilla/5.0 (X11; U; Linux i686; uk;
	rv:1.9.2.11) Gecko/20101013 Lightning/1.0b2 Thunderbird/3.1.5
MIME-Version: 1.0
To: Julian Elischer <julian@freebsd.org>
References: <4CD04AEC.8040607@aldan.algebra.com> <4CD051A9.7090200@freebsd.org>
In-Reply-To: <4CD051A9.7090200@freebsd.org>
Content-Type: text/plain; charset=KOI8-R; format=flowed
Content-Transfer-Encoding: 8bit
X-Mailman-Approved-At: Tue, 02 Nov 2010 22:08:08 +0000
Cc: fs@freebsd.org
Subject: Re: Using an SSD "disk" for /
X-BeenThere: freebsd-fs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Filesystems <freebsd-fs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-fs>
List-Post: <mailto:freebsd-fs@freebsd.org>
List-Help: <mailto:freebsd-fs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-fs>,
	<mailto:freebsd-fs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 02 Nov 2010 19:27:12 -0000

02.11.2010 14:00, Julian Elischer ΞΑΠΙΣΑΧ(ΜΑ):
> there are trim patches but not in the OS by default as yet.
Would the patches apply to RELENG_8 today, or do they require some 
9-only feature(s)?
>> Does anyone use an SSD under FreeBSD? Which brand/model? Are you 
>> happy with it?
> ...
> usually I use flash for data regions.
And? Do you use the TRIM-patches? Does performance stay high with time 
-- with or without TRIM? Do you use FFS or some other file-system? If 
FFS, are you relying on newfs' defaults?

Thank you! Yours,

    -mi

>> Also, what parameters should I give to newfs? SSDs' characteristics 
>> seem rather different from HDDs', so it is unlikely, that newfs' 
>> defaults will be optimal for an SSD... Would a different filesystem 
>> (ZFS?) be a better choice,