From mboxrd@z Thu Jan 1 00:00:00 1970 From: Piergiorgio Sartor Subject: Re: Performance question Date: Sat, 17 Jan 2009 19:20:40 +0100 Message-ID: <20090117182040.GA13355@lazy.lzy> References: <2f8901c978ce$f6cb6bde$3d01a8c0@exchange.rackspace.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <2f8901c978ce$f6cb6bde$3d01a8c0@exchange.rackspace.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids Hi, thanks for the answer. Well what I would like to have is exactly a configuration hint, eventually benchmarks and the like. The requirements are: two disks, redundacy. The question is: what configuration is reccommended in view of performances (or "what can be achieved"). Is that specific enough? Thanks again, bye, pg On Sat, Jan 17, 2009 at 12:11:00PM -0600, David Lethe wrote: > All we know is that you use 2 disks and md. This is like posting to a TCP/IP architecture group and saying you have a network connection and want performance advice. Read up, supply full config info, run benchmarks, then ask specific questions. GI=GO. > -----Original Message----- > > From: "Piergiorgio Sartor" > Subj: Performance question > Date: Sat Jan 17, 2009 11:18 am > Size: 874 bytes > To: "linux-raid@vger.kernel.org" > > Hi all, > > I'll have to setup some machines with two HDs (each) > in order to get some redundancy. > > Reading the MD features I noticed there are several > possibilities to create a mirror. > I was wondering which one offer the best perfomances > and/or what are the compromises to accept between > the different solutions. > > One possibility is a classic RAID-1 mirror. > Another is a RAID-10 far. > There would also be the RAID-10 near, but I guess > this is equivalent to RAID-1. > > Any suggestion on which method offers higher "speed"? > Or there are other possibilities with 2 HDs (keeping > the redundancy, of course)? > > Thanks a lot in advance, > > bye, > > -- > > piergiorgio > -- > 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 -- piergiorgio