From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lars Grobe MIME-Version: 1.0 References: <20030708211242.GD8053@questra.com> Subject: Re: [linux-lvm] Multiple Path possible with LVM ? Message-ID: <18486.1057708801@www37.gmx.net> Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: linux-lvm-admin@sistina.com Errors-To: linux-lvm-admin@sistina.com Reply-To: linux-lvm@sistina.com List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: Date: Tue Jul 8 19:01:02 2003 List-Id: To: linux-lvm@sistina.com Hi!=20 =20 > Just put your lvm volume on an md multipath device. Note=20 > that these are not loadbalanced paths in stock kernels, just=20 > failover paths.=20 =20 Well, in evms 2.1, with 2.4.21 and the md-multipath, I am offered=20 a load-balanced multipath configuration. However, as I currently=20 have the expensive emc module mentioned in the firt mail ;-), I=20 didn't really try this.=20 =20 If you want to have load balancing, just divide each raidset into=20 two luns / "devices", and access each raidset via two paths by this=20 configuration. If you put an lvm-stripeset over those two luns,=20 you get a "load-balanced" access to your raidset over both channels.=20 =20 I am currently doing tests with these configurations, but I have moved=20 to evms with our new fileserver because of some cluster functionality=20 in the 2.x-releases of evms. We have shared storage between two nodes,=20 and while you can do this with lvm, it is AFAIK a bit dangerous because=20 you must make sure that one nodes commits an vgscan if the other one=20 changed the lvm configuration.=20 =20 Good luck, CU Lars.=20 --=20 +++ GMX - Mail, Messaging & more http://www.gmx.net +++ Jetzt ein- oder umsteigen und USB-Speicheruhr als Pr=EF=BF=BDmie sichern!