From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lars Marowsky-Bree Subject: Re: Raid 0+1 Date: Fri, 30 Nov 2012 16:29:54 +0100 Message-ID: <20121130152954.GR29064@suse.de> References: <50B8C26C.7000807@profitbricks.com> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Content-Disposition: inline In-Reply-To: <50B8C26C.7000807@profitbricks.com> Sender: linux-raid-owner@vger.kernel.org To: linux-raid@vger.kernel.org List-Id: linux-raid.ids On 2012-11-30T15:27:56, Sebastian Riemer wrote: > Yes, it is possible but it only makes sense if you want to mirror to > another server as most people know that the alternative DRBD is too s= low > for serious storage requirements. >=20 > Create the RAID-0 first, then take your RAID-0 device and e.g. an iSC= SI > device from another storage server with the same setup and create a > RAID-1 over them. Then, you've got your stacked MD layers. >=20 > With the flag write-mostly you can even tell the read balancing that = the > remote device is slower than the local one. That is somewhat orthogonal to the original discussion, but in which benchmarks is this approach faster than DRBD - aren't the bottlenecks still the spindle and the network IO? Regards, Lars --=20 Architect Storage/HA SUSE LINUX Products GmbH, GF: Jeff Hawn, Jennifer Guild, Felix Imend=F6= rffer, HRB 21284 (AG N=FCrnberg) "Experience is the name everyone gives to their mistakes." -- Oscar Wil= de -- To unsubscribe from this list: send the line "unsubscribe linux-raid" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html