From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Dunn Subject: Re: Reed Solomon coding based Raid? Date: Sun, 29 Nov 2009 10:50:45 -0500 Message-ID: <4B129855.5050702@gmail.com> References: <4B113E90.50904@xs4all.nl> <1259423300.31633.190.camel@localhost> <1f808b4a0911280943x4ab781dbq28a11a2e3a77598a@mail.gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1f808b4a0911280943x4ab781dbq28a11a2e3a77598a@mail.gmail.com> Sender: linux-raid-owner@vger.kernel.org To: Peter Chacko Cc: Kasper Sandberg , John Hendrikx , linux-raid List-Id: linux-raid.ids I have been toying with the idea of an open source project to achieve a more generalized functional spec. than what symform has created. I was thinking of calling it RAINcloud (redundant array of independent nodes) I started drawing up the requirements over the holiday weekend. Peter Chacko wrote: > symform, a startup create 32 parity stipes of 64 original stripes, and > distribute the fragments in different geographies. > > they call it, RAID-96 And apparently reed-solomon coded. > > http://www.symform.com/features-benefits.aspx > > thanks > > On Sat, Nov 28, 2009 at 9:18 PM, Kasper Sandberg wrote: > >> As far as i know, theres not support for this, however, i do believe >> raid6 uses reed-solomon. >> >> On Sat, 2009-11-28 at 16:15 +0100, John Hendrikx wrote: >> >>> I was wondering if there is support for a raid level where one can >>> choose the redundancy level. Raid 5 allows for one redundant drive, >>> Raid 6 for two, but there's no raid level that would support arbitrary >>> redundancy (even to the point of allowing one to add extra redundancy >>> later on, by simply putting spare drives to immediate use). >>> >>> I'm just a casual Software Raid user, and have been using Raid 6 for a >>> small 8 TB array for a few years now and I realize that there's quite >>> some CPU overhead involved for such redundancy, but for my purposes >>> speed is not a relevant concern (10 MB/sec is enough). >>> >>> --John >>> >>> >>> -- >>> To unsubscribe from this list: send the line "unsubscribe linux-raid" in >>> the body of a message to majordomo@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >>> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-raid" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> > -- > To unsubscribe from this list: send the line "unsubscribe linux-raid" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- Andrew Dunn http://agdunn.net