[Ocfs2-users] lvm2 not cluster aware - okay, so how should Istripe my LUNs?

[Alexei_Roudnev]

And so, if you are running Oracle cluster, it is better to use ASM - it
keeps you in a single technology.

PS. Are these 12 LUN's from different physical disks or RAID arrays? If not
, it is useles to strip them.

----- Original Message ----- 
From: "Fabio Corazza" <fabio at newbay.com>
To: "Humpherys Philip D Contr 532 CMMXS/CL" <Phil.Humpherys at HILL.af.mil>
Cc: <ocfs2-users at oss.oracle.com>
Sent: Wednesday, October 04, 2006 4:32 PM
Subject: Re: [Ocfs2-users] lvm2 not cluster aware - okay, so how should
Istripe my LUNs?


> Humpherys Philip D Contr 532 CMMXS/CL wrote:
> > Hi, I'm testing ocfs2 in a 2-node ocfs2 cluster.  I have 12 SAN LUNs
> > that I'd like to stripe and mount up as an ocfs2 filesystem.  I've been
> > told that because LVM2 is not cluster aware, that it can't be used.  I'm
> > trying to make mdadm work.  (using EMC powerpath for multipath).  I can
> > create an md raid0 device on one node using the /dev/emcpowerxx
> > pseudo-devices, and on the other node the md device is there, but it has
> > scanned for the devices, and it shows the /dev/sd* devices, not the
> > pseudo-devices that really need to be used for multi-path.
> >
> >
> >
> > Does anyone know how to make the other node only use the pseudo-devices
> > for multi-path.  And what is recommended for RAID in ocfs2?
>
> I don't know about RAID0 striping over emcpower* devices, but you can
> use EVMS clustered within Heartbeat 2.x to stripe LUNs using LVM2
> metadata (that's what I do). But this will add additional point of
> failures to your system.
>
>
>
> Regards,
> Fabio
>
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