From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sander Subject: Re: SSD optimizations Date: Mon, 13 Dec 2010 06:11:57 +0100 Message-ID: <20101213051157.GA19543@attic.humilis.net> References: <1292174654.11248.10.camel@paddy-desktop> <4D05630E.7070809@bobich.net> Reply-To: sander@humilis.net Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: jarktasaa@gmail.com, linux-btrfs@vger.kernel.org To: Gordan Bobic Return-path: In-Reply-To: <4D05630E.7070809@bobich.net> List-ID: Gordan Bobic wrote (ao): > On 12/12/2010 17:24, Paddy Steed wrote: > >In a few weeks parts for my new computer will be arriving. The storage > >will be a 128GB SSD. A few weeks after that I will order three large > >disks for a RAID array. I understand that BTRFS RAID 5 support will be > >available shortly. What is the best possible way for me to get the > >highest performance out of this setup. I know of the option to optimize > >for SSD's > > BTRFS is hardly the best option for SSDs. I typically use ext4 > without a journal on SSDs, or ext2 if that is not available. > Journalling causes more writes to hit the disk, which wears out > flash faster. Plus, SSDs typically have much slower writes than > reads, so avoiding writes is a good thing. Gordan, this you wrote is so wrong I don't even know where to begin. You'd better google a bit on the subject (ssd, and btrfs on ssd) as much is written about it already. Sander -- Humilis IT Services and Solutions http://www.humilis.net