Date: Thu, 6 Jan 2011 21:23:57 -0500 From: Gary Palmer <gpalmer@freebsd.org> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: Chris Forgeron <cforgeron@acsi.ca>, "freebsd-stable@freebsd.org" <freebsd-stable@freebsd.org>, Artem Belevich <fbsdlist@src.cx>, Jean-Yves Avenard <jyavenard@gmail.com> Subject: Re: ZFS - moving from a zraid1 to zraid2 pool with 1.5tb disks Message-ID: <20110107022357.GA61893@in-addr.com> In-Reply-To: <20110107014249.GA3719@icarus.home.lan> References: <ifsia5$5ub$2@dough.gmane.org> <4D21E679.80002@my.gd> <84882169-0461-480F-8B4C-58E794BCC8E6@my.gd> <BEBC15BA440AB24484C067A3A9D38D7E0149F32D13E3@server7.acsi.ca> <488AE93A-97B9-4F01-AD0A-0098E4B329C3@my.gd> <AANLkTimezasVY%2BMJjWn2T9sBGQV-JrNmYqRwv_gPYPJP@mail.gmail.com> <CC37553B-EE13-4B5B-AC87-80D0ECC1A2B3@my.gd> <BEBC15BA440AB24484C067A3A9D38D7E0149F32D33F9@server7.acsi.ca> <AANLkTikfb7XzCfjetZYK016RoRG3JSs-%2BwiaaoCPTG8q@mail.gmail.com> <20110107014249.GA3719@icarus.home.lan>
index | next in thread | previous in thread | raw e-mail
On Thu, Jan 06, 2011 at 05:42:49PM -0800, Jeremy Chadwick wrote: > On Fri, Jan 07, 2011 at 12:29:17PM +1100, Jean-Yves Avenard wrote: > > On 6 January 2011 22:26, Chris Forgeron <cforgeron@acsi.ca> wrote: > > > You know, these days I'm not as happy with SSD's for ZIL. I may blog about some of the speed results I've been getting over the last 6mo-1yr that I've been running them with ZFS. I think people should be using hardware RAM drives. You can get old Gigabyte i-RAM drives with 4 gig of memory for the cost of a 60 gig SSD, and it will trounce the SSD for speed. > > > > > > I'd put your SSD to L2ARC (cache). > > > > Where do you find those though. > > > > I've looked and looked and all references I could find was that > > battery-powered RAM card that Sun used in their test setup, but it's > > not publicly available.. > > DDRdrive: > http://www.ddrdrive.com/ > http://www.engadget.com/2009/05/05/ddrdrives-ram-based-ssd-is-snappy-costly/ > > ACard ANS-9010: > http://techreport.com/articles.x/16255 There is also https://www.hyperossystems.co.uk/07042003/hardware.htm which I believe is a rebadged ACard drive. They should be SATA-300, but the test results I saw were not that impressive to be honest. I think whatever FPGA they use for the SATA interface and DRAM controller is either underpowered or the gate layout needs work. Regards, Garyhome | help
Want to link to this message? Use this
URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20110107022357.GA61893>